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| <span id="1003">1003</span> |
| <span id="1004">1004</span> |
| <span id="1005">1005</span> |
| <span id="1006">1006</span> |
| <span id="1007">1007</span> |
| <span id="1008">1008</span> |
| <span id="1009">1009</span> |
| <span id="1010">1010</span> |
| <span id="1011">1011</span> |
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| <span id="1016">1016</span> |
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| <span id="1020">1020</span> |
| <span id="1021">1021</span> |
| <span id="1022">1022</span> |
| <span id="1023">1023</span> |
| <span id="1024">1024</span> |
| <span id="1025">1025</span> |
| <span id="1026">1026</span> |
| <span id="1027">1027</span> |
| <span id="1028">1028</span> |
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| <span id="1030">1030</span> |
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| <span id="1032">1032</span> |
| <span id="1033">1033</span> |
| <span id="1034">1034</span> |
| <span id="1035">1035</span> |
| <span id="1036">1036</span> |
| <span id="1037">1037</span> |
| <span id="1038">1038</span> |
| <span id="1039">1039</span> |
| <span id="1040">1040</span> |
| <span id="1041">1041</span> |
| <span id="1042">1042</span> |
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| <span id="1045">1045</span> |
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| <span id="1049">1049</span> |
| <span id="1050">1050</span> |
| <span id="1051">1051</span> |
| <span id="1052">1052</span> |
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| <span id="1932">1932</span> |
| <span id="1933">1933</span> |
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| <span id="1936">1936</span> |
| <span id="1937">1937</span> |
| <span id="1938">1938</span> |
| <span id="1939">1939</span> |
| <span id="1940">1940</span> |
| <span id="1941">1941</span> |
| <span id="1942">1942</span> |
| <span id="1943">1943</span> |
| <span id="1944">1944</span> |
| <span id="1945">1945</span> |
| <span id="1946">1946</span> |
| <span id="1947">1947</span> |
| <span id="1948">1948</span> |
| <span id="1949">1949</span> |
| <span id="1950">1950</span> |
| <span id="1951">1951</span> |
| <span id="1952">1952</span> |
| <span id="1953">1953</span> |
| <span id="1954">1954</span> |
| </pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">internals::respan::respan</span>; |
| <span class="kw">use</span> <span class="ident">internals::symbol</span>::<span class="kw-2">*</span>; |
| <span class="kw">use</span> <span class="ident">internals</span>::{<span class="ident">ungroup</span>, <span class="ident">Ctxt</span>}; |
| <span class="kw">use</span> <span class="ident">proc_macro2</span>::{<span class="ident">Spacing</span>, <span class="ident">Span</span>, <span class="ident">TokenStream</span>, <span class="ident">TokenTree</span>}; |
| <span class="kw">use</span> <span class="ident">quote::ToTokens</span>; |
| <span class="kw">use</span> <span class="ident">std::borrow::Cow</span>; |
| <span class="kw">use</span> <span class="ident">std::collections::BTreeSet</span>; |
| <span class="kw">use</span> <span class="ident">syn</span>; |
| <span class="kw">use</span> <span class="ident">syn::parse</span>::{<span class="self">self</span>, <span class="ident">Parse</span>, <span class="ident">ParseStream</span>}; |
| <span class="kw">use</span> <span class="ident">syn::punctuated::Punctuated</span>; |
| <span class="kw">use</span> <span class="ident">syn::Ident</span>; |
| <span class="kw">use</span> <span class="ident">syn::Meta</span>::{<span class="ident">List</span>, <span class="ident">NameValue</span>, <span class="ident">Path</span>}; |
| <span class="kw">use</span> <span class="ident">syn::NestedMeta</span>::{<span class="ident">Lit</span>, <span class="ident">Meta</span>}; |
| |
| <span class="comment">// This module handles parsing of `#[serde(...)]` attributes. The entrypoints</span> |
| <span class="comment">// are `attr::Container::from_ast`, `attr::Variant::from_ast`, and</span> |
| <span class="comment">// `attr::Field::from_ast`. Each returns an instance of the corresponding</span> |
| <span class="comment">// struct. Note that none of them return a Result. Unrecognized, malformed, or</span> |
| <span class="comment">// duplicated attributes result in a span_err but otherwise are ignored. The</span> |
| <span class="comment">// user will see errors simultaneously for all bad attributes in the crate</span> |
| <span class="comment">// rather than just the first.</span> |
| |
| <span class="kw">pub</span> <span class="kw">use</span> <span class="ident">internals::case::RenameRule</span>; |
| |
| <span class="kw">struct</span> <span class="ident">Attr</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Ctxt</span>, |
| <span class="ident">name</span>: <span class="ident">Symbol</span>, |
| <span class="ident">tokens</span>: <span class="ident">TokenStream</span>, |
| <span class="ident">value</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">Attr</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="kw">fn</span> <span class="ident">none</span>(<span class="ident">cx</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Ctxt</span>, <span class="ident">name</span>: <span class="ident">Symbol</span>) -> <span class="self">Self</span> { |
| <span class="ident">Attr</span> { |
| <span class="ident">cx</span>, |
| <span class="ident">name</span>, |
| <span class="ident">tokens</span>: <span class="ident">TokenStream::new</span>(), |
| <span class="ident">value</span>: <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">set</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToTokens</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">obj</span>: <span class="ident">A</span>, <span class="ident">value</span>: <span class="ident">T</span>) { |
| <span class="kw">let</span> <span class="ident">tokens</span> <span class="op">=</span> <span class="ident">obj</span>.<span class="ident">into_token_stream</span>(); |
| |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">value</span>.<span class="ident">is_some</span>() { |
| <span class="self">self</span>.<span class="ident">cx</span> |
| .<span class="ident">error_spanned_by</span>(<span class="ident">tokens</span>, <span class="macro">format!</span>(<span class="string">"duplicate serde attribute `{}`"</span>, <span class="self">self</span>.<span class="ident">name</span>)); |
| } <span class="kw">else</span> { |
| <span class="self">self</span>.<span class="ident">tokens</span> <span class="op">=</span> <span class="ident">tokens</span>; |
| <span class="self">self</span>.<span class="ident">value</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">value</span>); |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">set_opt</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToTokens</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">obj</span>: <span class="ident">A</span>, <span class="ident">value</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">value</span>) <span class="op">=</span> <span class="ident">value</span> { |
| <span class="self">self</span>.<span class="ident">set</span>(<span class="ident">obj</span>, <span class="ident">value</span>); |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">set_if_none</span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">value</span>: <span class="ident">T</span>) { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">value</span>.<span class="ident">is_none</span>() { |
| <span class="self">self</span>.<span class="ident">value</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">value</span>); |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">get</span>(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">value</span> |
| } |
| |
| <span class="kw">fn</span> <span class="ident">get_with_tokens</span>(<span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span>(<span class="ident">TokenStream</span>, <span class="ident">T</span>)<span class="op">></span> { |
| <span class="kw">match</span> <span class="self">self</span>.<span class="ident">value</span> { |
| <span class="prelude-val">Some</span>(<span class="ident">v</span>) => <span class="prelude-val">Some</span>((<span class="self">self</span>.<span class="ident">tokens</span>, <span class="ident">v</span>)), |
| <span class="prelude-val">None</span> => <span class="prelude-val">None</span>, |
| } |
| } |
| } |
| |
| <span class="kw">struct</span> <span class="ident">BoolAttr</span><span class="op"><</span><span class="lifetime">'c</span><span class="op">></span>(<span class="ident">Attr</span><span class="op"><</span><span class="lifetime">'c</span>, ()<span class="op">></span>); |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'c</span><span class="op">></span> <span class="ident">BoolAttr</span><span class="op"><</span><span class="lifetime">'c</span><span class="op">></span> { |
| <span class="kw">fn</span> <span class="ident">none</span>(<span class="ident">cx</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Ctxt</span>, <span class="ident">name</span>: <span class="ident">Symbol</span>) -> <span class="self">Self</span> { |
| <span class="ident">BoolAttr</span>(<span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">name</span>)) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">set_true</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToTokens</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">obj</span>: <span class="ident">A</span>) { |
| <span class="self">self</span>.<span class="number">0</span>.<span class="ident">set</span>(<span class="ident">obj</span>, ()); |
| } |
| |
| <span class="kw">fn</span> <span class="ident">get</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="number">0</span>.<span class="ident">value</span>.<span class="ident">is_some</span>() |
| } |
| } |
| |
| <span class="kw">struct</span> <span class="ident">VecAttr</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Ctxt</span>, |
| <span class="ident">name</span>: <span class="ident">Symbol</span>, |
| <span class="ident">first_dup_tokens</span>: <span class="ident">TokenStream</span>, |
| <span class="ident">values</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> <span class="ident">VecAttr</span><span class="op"><</span><span class="lifetime">'c</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="kw">fn</span> <span class="ident">none</span>(<span class="ident">cx</span>: <span class="kw-2">&</span><span class="lifetime">'c</span> <span class="ident">Ctxt</span>, <span class="ident">name</span>: <span class="ident">Symbol</span>) -> <span class="self">Self</span> { |
| <span class="ident">VecAttr</span> { |
| <span class="ident">cx</span>, |
| <span class="ident">name</span>, |
| <span class="ident">first_dup_tokens</span>: <span class="ident">TokenStream::new</span>(), |
| <span class="ident">values</span>: <span class="ident">Vec::new</span>(), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">insert</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">ToTokens</span><span class="op">></span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">obj</span>: <span class="ident">A</span>, <span class="ident">value</span>: <span class="ident">T</span>) { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">values</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">1</span> { |
| <span class="self">self</span>.<span class="ident">first_dup_tokens</span> <span class="op">=</span> <span class="ident">obj</span>.<span class="ident">into_token_stream</span>(); |
| } |
| <span class="self">self</span>.<span class="ident">values</span>.<span class="ident">push</span>(<span class="ident">value</span>); |
| } |
| |
| <span class="kw">fn</span> <span class="ident">at_most_one</span>(<span class="kw-2">mut</span> <span class="self">self</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, ()<span class="op">></span> { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">values</span>.<span class="ident">len</span>() <span class="op">></span> <span class="number">1</span> { |
| <span class="kw">let</span> <span class="ident">dup_token</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">first_dup_tokens</span>; |
| <span class="self">self</span>.<span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">dup_token</span>, |
| <span class="macro">format!</span>(<span class="string">"duplicate serde attribute `{}`"</span>, <span class="self">self</span>.<span class="ident">name</span>), |
| ); |
| <span class="prelude-val">Err</span>(()) |
| } <span class="kw">else</span> { |
| <span class="prelude-val">Ok</span>(<span class="self">self</span>.<span class="ident">values</span>.<span class="ident">pop</span>()) |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">get</span>(<span class="self">self</span>) -> <span class="ident">Vec</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">values</span> |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Name</span> { |
| <span class="ident">serialize</span>: <span class="ident">String</span>, |
| <span class="ident">serialize_renamed</span>: <span class="ident">bool</span>, |
| <span class="ident">deserialize</span>: <span class="ident">String</span>, |
| <span class="ident">deserialize_renamed</span>: <span class="ident">bool</span>, |
| <span class="ident">deserialize_aliases</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>, |
| } |
| |
| <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span> |
| <span class="kw">fn</span> <span class="ident">unraw</span>(<span class="ident">ident</span>: <span class="kw-2">&</span><span class="ident">Ident</span>) -> <span class="ident">String</span> { |
| <span class="comment">// str::trim_start_matches was added in 1.30, trim_left_matches deprecated</span> |
| <span class="comment">// in 1.33. We currently support rustc back to 1.15 so we need to continue</span> |
| <span class="comment">// to use the deprecated one.</span> |
| <span class="ident">ident</span>.<span class="ident">to_string</span>().<span class="ident">trim_left_matches</span>(<span class="string">"r#"</span>).<span class="ident">to_owned</span>() |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Name</span> { |
| <span class="kw">fn</span> <span class="ident">from_attrs</span>( |
| <span class="ident">source_name</span>: <span class="ident">String</span>, |
| <span class="ident">ser_name</span>: <span class="ident">Attr</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>, |
| <span class="ident">de_name</span>: <span class="ident">Attr</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>, |
| <span class="ident">de_aliases</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">VecAttr</span><span class="op"><</span><span class="ident">String</span><span class="op">></span><span class="op">></span>, |
| ) -> <span class="ident">Name</span> { |
| <span class="kw">let</span> <span class="ident">deserialize_aliases</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">de_aliases</span> { |
| <span class="prelude-val">Some</span>(<span class="ident">de_aliases</span>) => { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">alias_list</span> <span class="op">=</span> <span class="ident">BTreeSet::new</span>(); |
| <span class="kw">for</span> <span class="ident">alias_name</span> <span class="kw">in</span> <span class="ident">de_aliases</span>.<span class="ident">get</span>() { |
| <span class="ident">alias_list</span>.<span class="ident">insert</span>(<span class="ident">alias_name</span>); |
| } |
| <span class="ident">alias_list</span>.<span class="ident">into_iter</span>().<span class="ident">collect</span>() |
| } |
| <span class="prelude-val">None</span> => <span class="ident">Vec::new</span>(), |
| }; |
| |
| <span class="kw">let</span> <span class="ident">ser_name</span> <span class="op">=</span> <span class="ident">ser_name</span>.<span class="ident">get</span>(); |
| <span class="kw">let</span> <span class="ident">ser_renamed</span> <span class="op">=</span> <span class="ident">ser_name</span>.<span class="ident">is_some</span>(); |
| <span class="kw">let</span> <span class="ident">de_name</span> <span class="op">=</span> <span class="ident">de_name</span>.<span class="ident">get</span>(); |
| <span class="kw">let</span> <span class="ident">de_renamed</span> <span class="op">=</span> <span class="ident">de_name</span>.<span class="ident">is_some</span>(); |
| <span class="ident">Name</span> { |
| <span class="ident">serialize</span>: <span class="ident">ser_name</span>.<span class="ident">unwrap_or_else</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">source_name</span>.<span class="ident">clone</span>()), |
| <span class="ident">serialize_renamed</span>: <span class="ident">ser_renamed</span>, |
| <span class="ident">deserialize</span>: <span class="ident">de_name</span>.<span class="ident">unwrap_or</span>(<span class="ident">source_name</span>), |
| <span class="ident">deserialize_renamed</span>: <span class="ident">de_renamed</span>, |
| <span class="ident">deserialize_aliases</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Return the container name for the container when serializing.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">serialize_name</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">String</span> { |
| <span class="self">self</span>.<span class="ident">serialize</span>.<span class="ident">clone</span>() |
| } |
| |
| <span class="doccomment">/// Return the container name for the container when deserializing.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">deserialize_name</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">String</span> { |
| <span class="self">self</span>.<span class="ident">deserialize</span>.<span class="ident">clone</span>() |
| } |
| |
| <span class="kw">fn</span> <span class="ident">deserialize_aliases</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Vec</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">aliases</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">deserialize_aliases</span>.<span class="ident">clone</span>(); |
| <span class="kw">let</span> <span class="ident">main_name</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">deserialize_name</span>(); |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">aliases</span>.<span class="ident">contains</span>(<span class="kw-2">&</span><span class="ident">main_name</span>) { |
| <span class="ident">aliases</span>.<span class="ident">push</span>(<span class="ident">main_name</span>); |
| } |
| <span class="ident">aliases</span> |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">RenameAllRules</span> { |
| <span class="ident">serialize</span>: <span class="ident">RenameRule</span>, |
| <span class="ident">deserialize</span>: <span class="ident">RenameRule</span>, |
| } |
| |
| <span class="doccomment">/// Represents struct or enum attribute information.</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Container</span> { |
| <span class="ident">name</span>: <span class="ident">Name</span>, |
| <span class="ident">transparent</span>: <span class="ident">bool</span>, |
| <span class="ident">deny_unknown_fields</span>: <span class="ident">bool</span>, |
| <span class="ident">default</span>: <span class="ident">Default</span>, |
| <span class="ident">rename_all_rules</span>: <span class="ident">RenameAllRules</span>, |
| <span class="ident">ser_bound</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">syn::WherePredicate</span><span class="op">></span><span class="op">></span>, |
| <span class="ident">de_bound</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">syn::WherePredicate</span><span class="op">></span><span class="op">></span>, |
| <span class="ident">tag</span>: <span class="ident">TagType</span>, |
| <span class="ident">type_from</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::Type</span><span class="op">></span>, |
| <span class="ident">type_try_from</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::Type</span><span class="op">></span>, |
| <span class="ident">type_into</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::Type</span><span class="op">></span>, |
| <span class="ident">remote</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::Path</span><span class="op">></span>, |
| <span class="ident">identifier</span>: <span class="ident">Identifier</span>, |
| <span class="ident">has_flatten</span>: <span class="ident">bool</span>, |
| <span class="ident">serde_path</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::Path</span><span class="op">></span>, |
| <span class="ident">is_packed</span>: <span class="ident">bool</span>, |
| <span class="doccomment">/// Error message generated when type can't be deserialized</span> |
| <span class="ident">expecting</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>, |
| } |
| |
| <span class="doccomment">/// Styles of representing an enum.</span> |
| <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">TagType</span> { |
| <span class="doccomment">/// The default.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// ```json</span> |
| <span class="doccomment">/// {"variant1": {"key1": "value1", "key2": "value2"}}</span> |
| <span class="doccomment">/// ```</span> |
| <span class="ident">External</span>, |
| |
| <span class="doccomment">/// `#[serde(tag = "type")]`</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// ```json</span> |
| <span class="doccomment">/// {"type": "variant1", "key1": "value1", "key2": "value2"}</span> |
| <span class="doccomment">/// ```</span> |
| <span class="ident">Internal</span> { <span class="ident">tag</span>: <span class="ident">String</span> }, |
| |
| <span class="doccomment">/// `#[serde(tag = "t", content = "c")]`</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// ```json</span> |
| <span class="doccomment">/// {"t": "variant1", "c": {"key1": "value1", "key2": "value2"}}</span> |
| <span class="doccomment">/// ```</span> |
| <span class="ident">Adjacent</span> { <span class="ident">tag</span>: <span class="ident">String</span>, <span class="ident">content</span>: <span class="ident">String</span> }, |
| |
| <span class="doccomment">/// `#[serde(untagged)]`</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// ```json</span> |
| <span class="doccomment">/// {"key1": "value1", "key2": "value2"}</span> |
| <span class="doccomment">/// ```</span> |
| <span class="prelude-val">None</span>, |
| } |
| |
| <span class="doccomment">/// Whether this enum represents the fields of a struct or the variants of an</span> |
| <span class="doccomment">/// enum.</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Copy</span>, <span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Identifier</span> { |
| <span class="doccomment">/// It does not.</span> |
| <span class="ident">No</span>, |
| |
| <span class="doccomment">/// This enum represents the fields of a struct. All of the variants must be</span> |
| <span class="doccomment">/// unit variants, except possibly one which is annotated with</span> |
| <span class="doccomment">/// `#[serde(other)]` and is a newtype variant.</span> |
| <span class="ident">Field</span>, |
| |
| <span class="doccomment">/// This enum represents the variants of an enum. All of the variants must</span> |
| <span class="doccomment">/// be unit variants.</span> |
| <span class="ident">Variant</span>, |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Identifier</span> { |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"deserialize_in_place"</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_some</span>(<span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Identifier::No</span> => <span class="bool-val">false</span>, |
| <span class="ident">Identifier::Field</span> <span class="op">|</span> <span class="ident">Identifier::Variant</span> => <span class="bool-val">true</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Container</span> { |
| <span class="doccomment">/// Extract out the `#[serde(...)]` attributes from an item.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_ast</span>(<span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">syn::DeriveInput</span>) -> <span class="self">Self</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ser_name</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_name</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">transparent</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">TRANSPARENT</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">deny_unknown_fields</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">DENY_UNKNOWN_FIELDS</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">default</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">DEFAULT</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">rename_all_ser_rule</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME_ALL</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">rename_all_de_rule</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME_ALL</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ser_bound</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">BOUND</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_bound</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">BOUND</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">untagged</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">UNTAGGED</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">internal_tag</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">TAG</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">content</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">CONTENT</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">type_from</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">FROM</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">type_try_from</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">TRY_FROM</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">type_into</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">INTO</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">remote</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">REMOTE</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">field_identifier</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">FIELD_IDENTIFIER</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">variant_identifier</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">VARIANT_IDENTIFIER</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">serde_path</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">CRATE</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">expecting</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">EXPECTING</span>); |
| |
| <span class="kw">for</span> <span class="ident">meta_item</span> <span class="kw">in</span> <span class="ident">item</span> |
| .<span class="ident">attrs</span> |
| .<span class="ident">iter</span>() |
| .<span class="ident">flat_map</span>(<span class="op">|</span><span class="ident">attr</span><span class="op">|</span> <span class="ident">get_serde_meta_items</span>(<span class="ident">cx</span>, <span class="ident">attr</span>)) |
| .<span class="ident">flatten</span>() |
| { |
| <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">meta_item</span> { |
| <span class="comment">// Parse `#[serde(rename = "foo")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">RENAME</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">ser_name</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| <span class="ident">de_name</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(rename(serialize = "foo", deserialize = "bar"))]`</span> |
| <span class="ident">Meta</span>(<span class="ident">List</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">RENAME</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>((<span class="ident">ser</span>, <span class="ident">de</span>)) <span class="op">=</span> <span class="ident">get_renames</span>(<span class="ident">cx</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">nested</span>) { |
| <span class="ident">ser_name</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">ser</span>.<span class="ident">map</span>(<span class="ident">syn::LitStr::value</span>)); |
| <span class="ident">de_name</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">de</span>.<span class="ident">map</span>(<span class="ident">syn::LitStr::value</span>)); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(rename_all = "foo")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">RENAME_ALL</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">RENAME_ALL</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="kw">match</span> <span class="ident">RenameRule::from_str</span>(<span class="kw-2">&</span><span class="ident">s</span>.<span class="ident">value</span>()) { |
| <span class="prelude-val">Ok</span>(<span class="ident">rename_rule</span>) => { |
| <span class="ident">rename_all_ser_rule</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">rename_rule</span>); |
| <span class="ident">rename_all_de_rule</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">rename_rule</span>); |
| } |
| <span class="prelude-val">Err</span>(<span class="ident">err</span>) => <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">s</span>, <span class="ident">err</span>), |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(rename_all(serialize = "foo", deserialize = "bar"))]`</span> |
| <span class="ident">Meta</span>(<span class="ident">List</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">RENAME_ALL</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>((<span class="ident">ser</span>, <span class="ident">de</span>)) <span class="op">=</span> <span class="ident">get_renames</span>(<span class="ident">cx</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">nested</span>) { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">ser</span>) <span class="op">=</span> <span class="ident">ser</span> { |
| <span class="kw">match</span> <span class="ident">RenameRule::from_str</span>(<span class="kw-2">&</span><span class="ident">ser</span>.<span class="ident">value</span>()) { |
| <span class="prelude-val">Ok</span>(<span class="ident">rename_rule</span>) => <span class="ident">rename_all_ser_rule</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">rename_rule</span>), |
| <span class="prelude-val">Err</span>(<span class="ident">err</span>) => <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">ser</span>, <span class="ident">err</span>), |
| } |
| } |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">de</span>) <span class="op">=</span> <span class="ident">de</span> { |
| <span class="kw">match</span> <span class="ident">RenameRule::from_str</span>(<span class="kw-2">&</span><span class="ident">de</span>.<span class="ident">value</span>()) { |
| <span class="prelude-val">Ok</span>(<span class="ident">rename_rule</span>) => <span class="ident">rename_all_de_rule</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">rename_rule</span>), |
| <span class="prelude-val">Err</span>(<span class="ident">err</span>) => <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">de</span>, <span class="ident">err</span>), |
| } |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(transparent)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">TRANSPARENT</span> => { |
| <span class="ident">transparent</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(deny_unknown_fields)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">DENY_UNKNOWN_FIELDS</span> => { |
| <span class="ident">deny_unknown_fields</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(default)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">DEFAULT</span> => <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">data</span> { |
| <span class="ident">syn::Data::Struct</span>(<span class="ident">syn::DataStruct</span> { <span class="ident">fields</span>, .. }) => <span class="kw">match</span> <span class="ident">fields</span> { |
| <span class="ident">syn::Fields::Named</span>(<span class="kw">_</span>) => { |
| <span class="ident">default</span>.<span class="ident">set</span>(<span class="ident">word</span>, <span class="ident">Default::Default</span>); |
| } |
| <span class="ident">syn::Fields::Unnamed</span>(<span class="kw">_</span>) <span class="op">|</span> <span class="ident">syn::Fields::Unit</span> => <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">fields</span>, |
| <span class="string">"#[serde(default)] can only be used on structs with named fields"</span>, |
| ), |
| }, |
| <span class="ident">syn::Data::Enum</span>(<span class="ident">syn::DataEnum</span> { <span class="ident">enum_token</span>, .. }) => <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">enum_token</span>, |
| <span class="string">"#[serde(default)] can only be used on structs with named fields"</span>, |
| ), |
| <span class="ident">syn::Data::Union</span>(<span class="ident">syn::DataUnion</span> { <span class="ident">union_token</span>, .. }) => <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">union_token</span>, |
| <span class="string">"#[serde(default)] can only be used on structs with named fields"</span>, |
| ), |
| }, |
| |
| <span class="comment">// Parse `#[serde(default = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">DEFAULT</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_expr_path</span>(<span class="ident">cx</span>, <span class="ident">DEFAULT</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">data</span> { |
| <span class="ident">syn::Data::Struct</span>(<span class="ident">syn::DataStruct</span> { <span class="ident">fields</span>, .. }) => { |
| <span class="kw">match</span> <span class="ident">fields</span> { |
| <span class="ident">syn::Fields::Named</span>(<span class="kw">_</span>) => { |
| <span class="ident">default</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">Default::Path</span>(<span class="ident">path</span>)); |
| } |
| <span class="ident">syn::Fields::Unnamed</span>(<span class="kw">_</span>) <span class="op">|</span> <span class="ident">syn::Fields::Unit</span> => <span class="ident">cx</span> |
| .<span class="ident">error_spanned_by</span>( |
| <span class="ident">fields</span>, |
| <span class="string">"#[serde(default = \"...\")] can only be used on structs with named fields"</span>, |
| ), |
| } |
| } |
| <span class="ident">syn::Data::Enum</span>(<span class="ident">syn::DataEnum</span> { <span class="ident">enum_token</span>, .. }) => <span class="ident">cx</span> |
| .<span class="ident">error_spanned_by</span>( |
| <span class="ident">enum_token</span>, |
| <span class="string">"#[serde(default = \"...\")] can only be used on structs with named fields"</span>, |
| ), |
| <span class="ident">syn::Data::Union</span>(<span class="ident">syn::DataUnion</span> { |
| <span class="ident">union_token</span>, .. |
| }) => <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">union_token</span>, |
| <span class="string">"#[serde(default = \"...\")] can only be used on structs with named fields"</span>, |
| ), |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(bound = "T: SomeBound")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">BOUND</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">where_predicates</span>) <span class="op">=</span> <span class="ident">parse_lit_into_where</span>(<span class="ident">cx</span>, <span class="ident">BOUND</span>, <span class="ident">BOUND</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">ser_bound</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">where_predicates</span>.<span class="ident">clone</span>()); |
| <span class="ident">de_bound</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">where_predicates</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(bound(serialize = "...", deserialize = "..."))]`</span> |
| <span class="ident">Meta</span>(<span class="ident">List</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">BOUND</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>((<span class="ident">ser</span>, <span class="ident">de</span>)) <span class="op">=</span> <span class="ident">get_where_predicates</span>(<span class="ident">cx</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">nested</span>) { |
| <span class="ident">ser_bound</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">ser</span>); |
| <span class="ident">de_bound</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">de</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(untagged)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">UNTAGGED</span> => <span class="kw">match</span> <span class="ident">item</span>.<span class="ident">data</span> { |
| <span class="ident">syn::Data::Enum</span>(<span class="kw">_</span>) => { |
| <span class="ident">untagged</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| <span class="ident">syn::Data::Struct</span>(<span class="ident">syn::DataStruct</span> { <span class="ident">struct_token</span>, .. }) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">struct_token</span>, |
| <span class="string">"#[serde(untagged)] can only be used on enums"</span>, |
| ); |
| } |
| <span class="ident">syn::Data::Union</span>(<span class="ident">syn::DataUnion</span> { <span class="ident">union_token</span>, .. }) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">union_token</span>, |
| <span class="string">"#[serde(untagged)] can only be used on enums"</span>, |
| ); |
| } |
| }, |
| |
| <span class="comment">// Parse `#[serde(tag = "type")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">TAG</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">TAG</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">data</span> { |
| <span class="ident">syn::Data::Enum</span>(<span class="kw">_</span>) => { |
| <span class="ident">internal_tag</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| } |
| <span class="ident">syn::Data::Struct</span>(<span class="ident">syn::DataStruct</span> { <span class="ident">fields</span>, .. }) => <span class="kw">match</span> <span class="ident">fields</span> { |
| <span class="ident">syn::Fields::Named</span>(<span class="kw">_</span>) => { |
| <span class="ident">internal_tag</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| } |
| <span class="ident">syn::Fields::Unnamed</span>(<span class="kw">_</span>) <span class="op">|</span> <span class="ident">syn::Fields::Unit</span> => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">fields</span>, |
| <span class="string">"#[serde(tag = \"...\")] can only be used on enums and structs with named fields"</span>, |
| ); |
| } |
| }, |
| <span class="ident">syn::Data::Union</span>(<span class="ident">syn::DataUnion</span> { <span class="ident">union_token</span>, .. }) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">union_token</span>, |
| <span class="string">"#[serde(tag = \"...\")] can only be used on enums and structs with named fields"</span>, |
| ); |
| } |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(content = "c")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">CONTENT</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">CONTENT</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">data</span> { |
| <span class="ident">syn::Data::Enum</span>(<span class="kw">_</span>) => { |
| <span class="ident">content</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| } |
| <span class="ident">syn::Data::Struct</span>(<span class="ident">syn::DataStruct</span> { <span class="ident">struct_token</span>, .. }) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">struct_token</span>, |
| <span class="string">"#[serde(content = \"...\")] can only be used on enums"</span>, |
| ); |
| } |
| <span class="ident">syn::Data::Union</span>(<span class="ident">syn::DataUnion</span> { <span class="ident">union_token</span>, .. }) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">union_token</span>, |
| <span class="string">"#[serde(content = \"...\")] can only be used on enums"</span>, |
| ); |
| } |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(from = "Type")]</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">FROM</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">from_ty</span>) <span class="op">=</span> <span class="ident">parse_lit_into_ty</span>(<span class="ident">cx</span>, <span class="ident">FROM</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">type_from</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="prelude-val">Some</span>(<span class="ident">from_ty</span>)); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(try_from = "Type")]</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">TRY_FROM</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">try_from_ty</span>) <span class="op">=</span> <span class="ident">parse_lit_into_ty</span>(<span class="ident">cx</span>, <span class="ident">TRY_FROM</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">type_try_from</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="prelude-val">Some</span>(<span class="ident">try_from_ty</span>)); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(into = "Type")]</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">INTO</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">into_ty</span>) <span class="op">=</span> <span class="ident">parse_lit_into_ty</span>(<span class="ident">cx</span>, <span class="ident">INTO</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">type_into</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="prelude-val">Some</span>(<span class="ident">into_ty</span>)); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(remote = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">REMOTE</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_path</span>(<span class="ident">cx</span>, <span class="ident">REMOTE</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="kw">if</span> <span class="ident">is_primitive_path</span>(<span class="kw-2">&</span><span class="ident">path</span>, <span class="string">"Self"</span>) { |
| <span class="ident">remote</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">item</span>.<span class="ident">ident</span>.<span class="ident">clone</span>().<span class="ident">into</span>()); |
| } <span class="kw">else</span> { |
| <span class="ident">remote</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">path</span>); |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(field_identifier)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">FIELD_IDENTIFIER</span> => { |
| <span class="ident">field_identifier</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(variant_identifier)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">VARIANT_IDENTIFIER</span> => { |
| <span class="ident">variant_identifier</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(crate = "foo")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">CRATE</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_path</span>(<span class="ident">cx</span>, <span class="ident">CRATE</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">serde_path</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">path</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(expecting = "a message")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">EXPECTING</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">EXPECTING</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">expecting</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| } |
| } |
| |
| <span class="ident">Meta</span>(<span class="ident">meta_item</span>) => { |
| <span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">meta_item</span> |
| .<span class="ident">path</span>() |
| .<span class="ident">into_token_stream</span>() |
| .<span class="ident">to_string</span>() |
| .<span class="ident">replace</span>(<span class="string">' '</span>, <span class="string">""</span>); |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">meta_item</span>.<span class="ident">path</span>(), |
| <span class="macro">format!</span>(<span class="string">"unknown serde container attribute `{}`"</span>, <span class="ident">path</span>), |
| ); |
| } |
| |
| <span class="ident">Lit</span>(<span class="ident">lit</span>) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">lit</span>, <span class="string">"unexpected literal in serde container attribute"</span>); |
| } |
| } |
| } |
| |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">is_packed</span> <span class="op">=</span> <span class="bool-val">false</span>; |
| <span class="kw">for</span> <span class="ident">attr</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">attrs</span> { |
| <span class="kw">if</span> <span class="ident">attr</span>.<span class="ident">path</span>.<span class="ident">is_ident</span>(<span class="string">"repr"</span>) { |
| <span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="ident">attr</span>.<span class="ident">parse_args_with</span>(<span class="op">|</span><span class="ident">input</span>: <span class="ident">ParseStream</span><span class="op">|</span> { |
| <span class="kw">while</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">token</span>) <span class="op">=</span> <span class="ident">input</span>.<span class="ident">parse</span>()<span class="question-mark">?</span> { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="ident">TokenTree::Ident</span>(<span class="ident">ident</span>) <span class="op">=</span> <span class="ident">token</span> { |
| <span class="ident">is_packed</span> <span class="op">|</span><span class="op">=</span> <span class="ident">ident</span> <span class="op">==</span> <span class="string">"packed"</span>; |
| } |
| } |
| <span class="prelude-val">Ok</span>(()) |
| }); |
| } |
| } |
| |
| <span class="ident">Container</span> { |
| <span class="ident">name</span>: <span class="ident">Name::from_attrs</span>(<span class="ident">unraw</span>(<span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">ident</span>), <span class="ident">ser_name</span>, <span class="ident">de_name</span>, <span class="prelude-val">None</span>), |
| <span class="ident">transparent</span>: <span class="ident">transparent</span>.<span class="ident">get</span>(), |
| <span class="ident">deny_unknown_fields</span>: <span class="ident">deny_unknown_fields</span>.<span class="ident">get</span>(), |
| <span class="ident">default</span>: <span class="ident">default</span>.<span class="ident">get</span>().<span class="ident">unwrap_or</span>(<span class="ident">Default::None</span>), |
| <span class="ident">rename_all_rules</span>: <span class="ident">RenameAllRules</span> { |
| <span class="ident">serialize</span>: <span class="ident">rename_all_ser_rule</span>.<span class="ident">get</span>().<span class="ident">unwrap_or</span>(<span class="ident">RenameRule::None</span>), |
| <span class="ident">deserialize</span>: <span class="ident">rename_all_de_rule</span>.<span class="ident">get</span>().<span class="ident">unwrap_or</span>(<span class="ident">RenameRule::None</span>), |
| }, |
| <span class="ident">ser_bound</span>: <span class="ident">ser_bound</span>.<span class="ident">get</span>(), |
| <span class="ident">de_bound</span>: <span class="ident">de_bound</span>.<span class="ident">get</span>(), |
| <span class="ident">tag</span>: <span class="ident">decide_tag</span>(<span class="ident">cx</span>, <span class="ident">item</span>, <span class="ident">untagged</span>, <span class="ident">internal_tag</span>, <span class="ident">content</span>), |
| <span class="ident">type_from</span>: <span class="ident">type_from</span>.<span class="ident">get</span>(), |
| <span class="ident">type_try_from</span>: <span class="ident">type_try_from</span>.<span class="ident">get</span>(), |
| <span class="ident">type_into</span>: <span class="ident">type_into</span>.<span class="ident">get</span>(), |
| <span class="ident">remote</span>: <span class="ident">remote</span>.<span class="ident">get</span>(), |
| <span class="ident">identifier</span>: <span class="ident">decide_identifier</span>(<span class="ident">cx</span>, <span class="ident">item</span>, <span class="ident">field_identifier</span>, <span class="ident">variant_identifier</span>), |
| <span class="ident">has_flatten</span>: <span class="bool-val">false</span>, |
| <span class="ident">serde_path</span>: <span class="ident">serde_path</span>.<span class="ident">get</span>(), |
| <span class="ident">is_packed</span>, |
| <span class="ident">expecting</span>: <span class="ident">expecting</span>.<span class="ident">get</span>(), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">name</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident">Name</span> { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">name</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">rename_all_rules</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident">RenameAllRules</span> { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">rename_all_rules</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">transparent</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">transparent</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">deny_unknown_fields</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">deny_unknown_fields</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">default</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident">Default</span> { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">default</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ser_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span>[<span class="ident">syn::WherePredicate</span>]<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">ser_bound</span>.<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">vec</span><span class="op">|</span> <span class="kw-2">&</span><span class="ident">vec</span>[..]) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">de_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span>[<span class="ident">syn::WherePredicate</span>]<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">de_bound</span>.<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">vec</span><span class="op">|</span> <span class="kw-2">&</span><span class="ident">vec</span>[..]) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">tag</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident">TagType</span> { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">tag</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">type_from</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::Type</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">type_from</span>.<span class="ident">as_ref</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">type_try_from</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::Type</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">type_try_from</span>.<span class="ident">as_ref</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">type_into</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::Type</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">type_into</span>.<span class="ident">as_ref</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">remote</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::Path</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">remote</span>.<span class="ident">as_ref</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_packed</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">is_packed</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">identifier</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Identifier</span> { |
| <span class="self">self</span>.<span class="ident">identifier</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">has_flatten</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">has_flatten</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">mark_has_flatten</span>(<span class="kw-2">&mut</span> <span class="self">self</span>) { |
| <span class="self">self</span>.<span class="ident">has_flatten</span> <span class="op">=</span> <span class="bool-val">true</span>; |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">custom_serde_path</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::Path</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">serde_path</span>.<span class="ident">as_ref</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">serde_path</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Cow</span><span class="op"><</span><span class="ident">syn::Path</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">custom_serde_path</span>() |
| .<span class="ident">map_or_else</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">Cow::Owned</span>(<span class="macro">parse_quote!</span>(<span class="ident">_serde</span>)), <span class="ident">Cow::Borrowed</span>) |
| } |
| |
| <span class="doccomment">/// Error message generated when type can't be deserialized.</span> |
| <span class="doccomment">/// If `None`, default message will be used</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">expecting</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">expecting</span>.<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="ident">String::as_ref</span>) |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">decide_tag</span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">syn::DeriveInput</span>, |
| <span class="ident">untagged</span>: <span class="ident">BoolAttr</span>, |
| <span class="ident">internal_tag</span>: <span class="ident">Attr</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>, |
| <span class="ident">content</span>: <span class="ident">Attr</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>, |
| ) -> <span class="ident">TagType</span> { |
| <span class="kw">match</span> ( |
| <span class="ident">untagged</span>.<span class="number">0</span>.<span class="ident">get_with_tokens</span>(), |
| <span class="ident">internal_tag</span>.<span class="ident">get_with_tokens</span>(), |
| <span class="ident">content</span>.<span class="ident">get_with_tokens</span>(), |
| ) { |
| (<span class="prelude-val">None</span>, <span class="prelude-val">None</span>, <span class="prelude-val">None</span>) => <span class="ident">TagType::External</span>, |
| (<span class="prelude-val">Some</span>(<span class="kw">_</span>), <span class="prelude-val">None</span>, <span class="prelude-val">None</span>) => <span class="ident">TagType::None</span>, |
| (<span class="prelude-val">None</span>, <span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="ident">tag</span>)), <span class="prelude-val">None</span>) => { |
| <span class="comment">// Check that there are no tuple variants.</span> |
| <span class="kw">if</span> <span class="kw">let</span> <span class="ident">syn::Data::Enum</span>(<span class="ident">data</span>) <span class="op">=</span> <span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">data</span> { |
| <span class="kw">for</span> <span class="ident">variant</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">data</span>.<span class="ident">variants</span> { |
| <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">variant</span>.<span class="ident">fields</span> { |
| <span class="ident">syn::Fields::Named</span>(<span class="kw">_</span>) <span class="op">|</span> <span class="ident">syn::Fields::Unit</span> => {} |
| <span class="ident">syn::Fields::Unnamed</span>(<span class="ident">fields</span>) => { |
| <span class="kw">if</span> <span class="ident">fields</span>.<span class="ident">unnamed</span>.<span class="ident">len</span>() <span class="op">!</span><span class="op">=</span> <span class="number">1</span> { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">variant</span>, |
| <span class="string">"#[serde(tag = \"...\")] cannot be used with tuple variants"</span>, |
| ); |
| <span class="kw">break</span>; |
| } |
| } |
| } |
| } |
| } |
| <span class="ident">TagType::Internal</span> { <span class="ident">tag</span> } |
| } |
| (<span class="prelude-val">Some</span>((<span class="ident">untagged_tokens</span>, <span class="kw">_</span>)), <span class="prelude-val">Some</span>((<span class="ident">tag_tokens</span>, <span class="kw">_</span>)), <span class="prelude-val">None</span>) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">untagged_tokens</span>, |
| <span class="string">"enum cannot be both untagged and internally tagged"</span>, |
| ); |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">tag_tokens</span>, |
| <span class="string">"enum cannot be both untagged and internally tagged"</span>, |
| ); |
| <span class="ident">TagType::External</span> <span class="comment">// doesn't matter, will error</span> |
| } |
| (<span class="prelude-val">None</span>, <span class="prelude-val">None</span>, <span class="prelude-val">Some</span>((<span class="ident">content_tokens</span>, <span class="kw">_</span>))) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">content_tokens</span>, |
| <span class="string">"#[serde(tag = \"...\", content = \"...\")] must be used together"</span>, |
| ); |
| <span class="ident">TagType::External</span> |
| } |
| (<span class="prelude-val">Some</span>((<span class="ident">untagged_tokens</span>, <span class="kw">_</span>)), <span class="prelude-val">None</span>, <span class="prelude-val">Some</span>((<span class="ident">content_tokens</span>, <span class="kw">_</span>))) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">untagged_tokens</span>, |
| <span class="string">"untagged enum cannot have #[serde(content = \"...\")]"</span>, |
| ); |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">content_tokens</span>, |
| <span class="string">"untagged enum cannot have #[serde(content = \"...\")]"</span>, |
| ); |
| <span class="ident">TagType::External</span> |
| } |
| (<span class="prelude-val">None</span>, <span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="ident">tag</span>)), <span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="ident">content</span>))) => <span class="ident">TagType::Adjacent</span> { <span class="ident">tag</span>, <span class="ident">content</span> }, |
| (<span class="prelude-val">Some</span>((<span class="ident">untagged_tokens</span>, <span class="kw">_</span>)), <span class="prelude-val">Some</span>((<span class="ident">tag_tokens</span>, <span class="kw">_</span>)), <span class="prelude-val">Some</span>((<span class="ident">content_tokens</span>, <span class="kw">_</span>))) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">untagged_tokens</span>, |
| <span class="string">"untagged enum cannot have #[serde(tag = \"...\", content = \"...\")]"</span>, |
| ); |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">tag_tokens</span>, |
| <span class="string">"untagged enum cannot have #[serde(tag = \"...\", content = \"...\")]"</span>, |
| ); |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">content_tokens</span>, |
| <span class="string">"untagged enum cannot have #[serde(tag = \"...\", content = \"...\")]"</span>, |
| ); |
| <span class="ident">TagType::External</span> |
| } |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">decide_identifier</span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">item</span>: <span class="kw-2">&</span><span class="ident">syn::DeriveInput</span>, |
| <span class="ident">field_identifier</span>: <span class="ident">BoolAttr</span>, |
| <span class="ident">variant_identifier</span>: <span class="ident">BoolAttr</span>, |
| ) -> <span class="ident">Identifier</span> { |
| <span class="kw">match</span> ( |
| <span class="kw-2">&</span><span class="ident">item</span>.<span class="ident">data</span>, |
| <span class="ident">field_identifier</span>.<span class="number">0</span>.<span class="ident">get_with_tokens</span>(), |
| <span class="ident">variant_identifier</span>.<span class="number">0</span>.<span class="ident">get_with_tokens</span>(), |
| ) { |
| (<span class="kw">_</span>, <span class="prelude-val">None</span>, <span class="prelude-val">None</span>) => <span class="ident">Identifier::No</span>, |
| (<span class="kw">_</span>, <span class="prelude-val">Some</span>((<span class="ident">field_identifier_tokens</span>, <span class="kw">_</span>)), <span class="prelude-val">Some</span>((<span class="ident">variant_identifier_tokens</span>, <span class="kw">_</span>))) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">field_identifier_tokens</span>, |
| <span class="string">"#[serde(field_identifier)] and #[serde(variant_identifier)] cannot both be set"</span>, |
| ); |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">variant_identifier_tokens</span>, |
| <span class="string">"#[serde(field_identifier)] and #[serde(variant_identifier)] cannot both be set"</span>, |
| ); |
| <span class="ident">Identifier::No</span> |
| } |
| (<span class="ident">syn::Data::Enum</span>(<span class="kw">_</span>), <span class="prelude-val">Some</span>(<span class="kw">_</span>), <span class="prelude-val">None</span>) => <span class="ident">Identifier::Field</span>, |
| (<span class="ident">syn::Data::Enum</span>(<span class="kw">_</span>), <span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(<span class="kw">_</span>)) => <span class="ident">Identifier::Variant</span>, |
| (<span class="ident">syn::Data::Struct</span>(<span class="ident">syn::DataStruct</span> { <span class="ident">struct_token</span>, .. }), <span class="prelude-val">Some</span>(<span class="kw">_</span>), <span class="prelude-val">None</span>) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">struct_token</span>, |
| <span class="string">"#[serde(field_identifier)] can only be used on an enum"</span>, |
| ); |
| <span class="ident">Identifier::No</span> |
| } |
| (<span class="ident">syn::Data::Union</span>(<span class="ident">syn::DataUnion</span> { <span class="ident">union_token</span>, .. }), <span class="prelude-val">Some</span>(<span class="kw">_</span>), <span class="prelude-val">None</span>) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">union_token</span>, |
| <span class="string">"#[serde(field_identifier)] can only be used on an enum"</span>, |
| ); |
| <span class="ident">Identifier::No</span> |
| } |
| (<span class="ident">syn::Data::Struct</span>(<span class="ident">syn::DataStruct</span> { <span class="ident">struct_token</span>, .. }), <span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(<span class="kw">_</span>)) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">struct_token</span>, |
| <span class="string">"#[serde(variant_identifier)] can only be used on an enum"</span>, |
| ); |
| <span class="ident">Identifier::No</span> |
| } |
| (<span class="ident">syn::Data::Union</span>(<span class="ident">syn::DataUnion</span> { <span class="ident">union_token</span>, .. }), <span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(<span class="kw">_</span>)) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">union_token</span>, |
| <span class="string">"#[serde(variant_identifier)] can only be used on an enum"</span>, |
| ); |
| <span class="ident">Identifier::No</span> |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Represents variant attribute information</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Variant</span> { |
| <span class="ident">name</span>: <span class="ident">Name</span>, |
| <span class="ident">rename_all_rules</span>: <span class="ident">RenameAllRules</span>, |
| <span class="ident">ser_bound</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">syn::WherePredicate</span><span class="op">></span><span class="op">></span>, |
| <span class="ident">de_bound</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">syn::WherePredicate</span><span class="op">></span><span class="op">></span>, |
| <span class="ident">skip_deserializing</span>: <span class="ident">bool</span>, |
| <span class="ident">skip_serializing</span>: <span class="ident">bool</span>, |
| <span class="ident">other</span>: <span class="ident">bool</span>, |
| <span class="ident">serialize_with</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::ExprPath</span><span class="op">></span>, |
| <span class="ident">deserialize_with</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::ExprPath</span><span class="op">></span>, |
| <span class="ident">borrow</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::Meta</span><span class="op">></span>, |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Variant</span> { |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_ast</span>(<span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, <span class="ident">variant</span>: <span class="kw-2">&</span><span class="ident">syn::Variant</span>) -> <span class="self">Self</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ser_name</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_name</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_aliases</span> <span class="op">=</span> <span class="ident">VecAttr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">skip_deserializing</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">SKIP_DESERIALIZING</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">skip_serializing</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">SKIP_SERIALIZING</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">rename_all_ser_rule</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME_ALL</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">rename_all_de_rule</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME_ALL</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ser_bound</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">BOUND</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_bound</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">BOUND</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">other</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">OTHER</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">serialize_with</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">SERIALIZE_WITH</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">DESERIALIZE_WITH</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">borrow</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">BORROW</span>); |
| |
| <span class="kw">for</span> <span class="ident">meta_item</span> <span class="kw">in</span> <span class="ident">variant</span> |
| .<span class="ident">attrs</span> |
| .<span class="ident">iter</span>() |
| .<span class="ident">flat_map</span>(<span class="op">|</span><span class="ident">attr</span><span class="op">|</span> <span class="ident">get_serde_meta_items</span>(<span class="ident">cx</span>, <span class="ident">attr</span>)) |
| .<span class="ident">flatten</span>() |
| { |
| <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">meta_item</span> { |
| <span class="comment">// Parse `#[serde(rename = "foo")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">RENAME</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">ser_name</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| <span class="ident">de_name</span>.<span class="ident">set_if_none</span>(<span class="ident">s</span>.<span class="ident">value</span>()); |
| <span class="ident">de_aliases</span>.<span class="ident">insert</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(rename(serialize = "foo", deserialize = "bar"))]`</span> |
| <span class="ident">Meta</span>(<span class="ident">List</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">RENAME</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>((<span class="ident">ser</span>, <span class="ident">de</span>)) <span class="op">=</span> <span class="ident">get_multiple_renames</span>(<span class="ident">cx</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">nested</span>) { |
| <span class="ident">ser_name</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">ser</span>.<span class="ident">map</span>(<span class="ident">syn::LitStr::value</span>)); |
| <span class="kw">for</span> <span class="ident">de_value</span> <span class="kw">in</span> <span class="ident">de</span> { |
| <span class="ident">de_name</span>.<span class="ident">set_if_none</span>(<span class="ident">de_value</span>.<span class="ident">value</span>()); |
| <span class="ident">de_aliases</span>.<span class="ident">insert</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">de_value</span>.<span class="ident">value</span>()); |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(alias = "foo")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">ALIAS</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">ALIAS</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">de_aliases</span>.<span class="ident">insert</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(rename_all = "foo")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">RENAME_ALL</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">RENAME_ALL</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="kw">match</span> <span class="ident">RenameRule::from_str</span>(<span class="kw-2">&</span><span class="ident">s</span>.<span class="ident">value</span>()) { |
| <span class="prelude-val">Ok</span>(<span class="ident">rename_rule</span>) => { |
| <span class="ident">rename_all_ser_rule</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">rename_rule</span>); |
| <span class="ident">rename_all_de_rule</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">rename_rule</span>); |
| } |
| <span class="prelude-val">Err</span>(<span class="ident">err</span>) => <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">s</span>, <span class="ident">err</span>), |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(rename_all(serialize = "foo", deserialize = "bar"))]`</span> |
| <span class="ident">Meta</span>(<span class="ident">List</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">RENAME_ALL</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>((<span class="ident">ser</span>, <span class="ident">de</span>)) <span class="op">=</span> <span class="ident">get_renames</span>(<span class="ident">cx</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">nested</span>) { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">ser</span>) <span class="op">=</span> <span class="ident">ser</span> { |
| <span class="kw">match</span> <span class="ident">RenameRule::from_str</span>(<span class="kw-2">&</span><span class="ident">ser</span>.<span class="ident">value</span>()) { |
| <span class="prelude-val">Ok</span>(<span class="ident">rename_rule</span>) => <span class="ident">rename_all_ser_rule</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">rename_rule</span>), |
| <span class="prelude-val">Err</span>(<span class="ident">err</span>) => <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">ser</span>, <span class="ident">err</span>), |
| } |
| } |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">de</span>) <span class="op">=</span> <span class="ident">de</span> { |
| <span class="kw">match</span> <span class="ident">RenameRule::from_str</span>(<span class="kw-2">&</span><span class="ident">de</span>.<span class="ident">value</span>()) { |
| <span class="prelude-val">Ok</span>(<span class="ident">rename_rule</span>) => <span class="ident">rename_all_de_rule</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">rename_rule</span>), |
| <span class="prelude-val">Err</span>(<span class="ident">err</span>) => <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">de</span>, <span class="ident">err</span>), |
| } |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(skip)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">SKIP</span> => { |
| <span class="ident">skip_serializing</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| <span class="ident">skip_deserializing</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(skip_deserializing)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">SKIP_DESERIALIZING</span> => { |
| <span class="ident">skip_deserializing</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(skip_serializing)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">SKIP_SERIALIZING</span> => { |
| <span class="ident">skip_serializing</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(other)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">OTHER</span> => { |
| <span class="ident">other</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(bound = "T: SomeBound")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">BOUND</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">where_predicates</span>) <span class="op">=</span> <span class="ident">parse_lit_into_where</span>(<span class="ident">cx</span>, <span class="ident">BOUND</span>, <span class="ident">BOUND</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">ser_bound</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">where_predicates</span>.<span class="ident">clone</span>()); |
| <span class="ident">de_bound</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">where_predicates</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(bound(serialize = "...", deserialize = "..."))]`</span> |
| <span class="ident">Meta</span>(<span class="ident">List</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">BOUND</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>((<span class="ident">ser</span>, <span class="ident">de</span>)) <span class="op">=</span> <span class="ident">get_where_predicates</span>(<span class="ident">cx</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">nested</span>) { |
| <span class="ident">ser_bound</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">ser</span>); |
| <span class="ident">de_bound</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">de</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(with = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">WITH</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_expr_path</span>(<span class="ident">cx</span>, <span class="ident">WITH</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ser_path</span> <span class="op">=</span> <span class="ident">path</span>.<span class="ident">clone</span>(); |
| <span class="ident">ser_path</span> |
| .<span class="ident">path</span> |
| .<span class="ident">segments</span> |
| .<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"serialize"</span>, <span class="ident">Span::call_site</span>()).<span class="ident">into</span>()); |
| <span class="ident">serialize_with</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">ser_path</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_path</span> <span class="op">=</span> <span class="ident">path</span>; |
| <span class="ident">de_path</span> |
| .<span class="ident">path</span> |
| .<span class="ident">segments</span> |
| .<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"deserialize"</span>, <span class="ident">Span::call_site</span>()).<span class="ident">into</span>()); |
| <span class="ident">deserialize_with</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">de_path</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(serialize_with = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">SERIALIZE_WITH</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_expr_path</span>(<span class="ident">cx</span>, <span class="ident">SERIALIZE_WITH</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">serialize_with</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">path</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(deserialize_with = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">DESERIALIZE_WITH</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_expr_path</span>(<span class="ident">cx</span>, <span class="ident">DESERIALIZE_WITH</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">deserialize_with</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">path</span>); |
| } |
| } |
| |
| <span class="comment">// Defer `#[serde(borrow)]` and `#[serde(borrow = "'a + 'b")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">m</span>) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span>() <span class="op">==</span> <span class="ident">BORROW</span> => <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">variant</span>.<span class="ident">fields</span> { |
| <span class="ident">syn::Fields::Unnamed</span>(<span class="ident">fields</span>) <span class="kw">if</span> <span class="ident">fields</span>.<span class="ident">unnamed</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">1</span> => { |
| <span class="ident">borrow</span>.<span class="ident">set</span>(<span class="ident">m</span>.<span class="ident">path</span>(), <span class="ident">m</span>.<span class="ident">clone</span>()); |
| } |
| <span class="kw">_</span> => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">variant</span>, |
| <span class="string">"#[serde(borrow)] may only be used on newtype variants"</span>, |
| ); |
| } |
| }, |
| |
| <span class="ident">Meta</span>(<span class="ident">meta_item</span>) => { |
| <span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">meta_item</span> |
| .<span class="ident">path</span>() |
| .<span class="ident">into_token_stream</span>() |
| .<span class="ident">to_string</span>() |
| .<span class="ident">replace</span>(<span class="string">' '</span>, <span class="string">""</span>); |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">meta_item</span>.<span class="ident">path</span>(), |
| <span class="macro">format!</span>(<span class="string">"unknown serde variant attribute `{}`"</span>, <span class="ident">path</span>), |
| ); |
| } |
| |
| <span class="ident">Lit</span>(<span class="ident">lit</span>) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">lit</span>, <span class="string">"unexpected literal in serde variant attribute"</span>); |
| } |
| } |
| } |
| |
| <span class="ident">Variant</span> { |
| <span class="ident">name</span>: <span class="ident">Name::from_attrs</span>(<span class="ident">unraw</span>(<span class="kw-2">&</span><span class="ident">variant</span>.<span class="ident">ident</span>), <span class="ident">ser_name</span>, <span class="ident">de_name</span>, <span class="prelude-val">Some</span>(<span class="ident">de_aliases</span>)), |
| <span class="ident">rename_all_rules</span>: <span class="ident">RenameAllRules</span> { |
| <span class="ident">serialize</span>: <span class="ident">rename_all_ser_rule</span>.<span class="ident">get</span>().<span class="ident">unwrap_or</span>(<span class="ident">RenameRule::None</span>), |
| <span class="ident">deserialize</span>: <span class="ident">rename_all_de_rule</span>.<span class="ident">get</span>().<span class="ident">unwrap_or</span>(<span class="ident">RenameRule::None</span>), |
| }, |
| <span class="ident">ser_bound</span>: <span class="ident">ser_bound</span>.<span class="ident">get</span>(), |
| <span class="ident">de_bound</span>: <span class="ident">de_bound</span>.<span class="ident">get</span>(), |
| <span class="ident">skip_deserializing</span>: <span class="ident">skip_deserializing</span>.<span class="ident">get</span>(), |
| <span class="ident">skip_serializing</span>: <span class="ident">skip_serializing</span>.<span class="ident">get</span>(), |
| <span class="ident">other</span>: <span class="ident">other</span>.<span class="ident">get</span>(), |
| <span class="ident">serialize_with</span>: <span class="ident">serialize_with</span>.<span class="ident">get</span>(), |
| <span class="ident">deserialize_with</span>: <span class="ident">deserialize_with</span>.<span class="ident">get</span>(), |
| <span class="ident">borrow</span>: <span class="ident">borrow</span>.<span class="ident">get</span>(), |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">name</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident">Name</span> { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">name</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">aliases</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Vec</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">name</span>.<span class="ident">deserialize_aliases</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">rename_by_rules</span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">rules</span>: <span class="kw-2">&</span><span class="ident">RenameAllRules</span>) { |
| <span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">name</span>.<span class="ident">serialize_renamed</span> { |
| <span class="self">self</span>.<span class="ident">name</span>.<span class="ident">serialize</span> <span class="op">=</span> <span class="ident">rules</span>.<span class="ident">serialize</span>.<span class="ident">apply_to_variant</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">name</span>.<span class="ident">serialize</span>); |
| } |
| <span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">name</span>.<span class="ident">deserialize_renamed</span> { |
| <span class="self">self</span>.<span class="ident">name</span>.<span class="ident">deserialize</span> <span class="op">=</span> <span class="ident">rules</span>.<span class="ident">deserialize</span>.<span class="ident">apply_to_variant</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">name</span>.<span class="ident">deserialize</span>); |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">rename_all_rules</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident">RenameAllRules</span> { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">rename_all_rules</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ser_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span>[<span class="ident">syn::WherePredicate</span>]<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">ser_bound</span>.<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">vec</span><span class="op">|</span> <span class="kw-2">&</span><span class="ident">vec</span>[..]) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">de_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span>[<span class="ident">syn::WherePredicate</span>]<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">de_bound</span>.<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">vec</span><span class="op">|</span> <span class="kw-2">&</span><span class="ident">vec</span>[..]) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">skip_deserializing</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">skip_deserializing</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">skip_serializing</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">skip_serializing</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">other</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">other</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">serialize_with</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::ExprPath</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">serialize_with</span>.<span class="ident">as_ref</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">deserialize_with</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::ExprPath</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">deserialize_with</span>.<span class="ident">as_ref</span>() |
| } |
| } |
| |
| <span class="doccomment">/// Represents field attribute information</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Field</span> { |
| <span class="ident">name</span>: <span class="ident">Name</span>, |
| <span class="ident">skip_serializing</span>: <span class="ident">bool</span>, |
| <span class="ident">skip_deserializing</span>: <span class="ident">bool</span>, |
| <span class="ident">skip_serializing_if</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::ExprPath</span><span class="op">></span>, |
| <span class="ident">default</span>: <span class="ident">Default</span>, |
| <span class="ident">serialize_with</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::ExprPath</span><span class="op">></span>, |
| <span class="ident">deserialize_with</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::ExprPath</span><span class="op">></span>, |
| <span class="ident">ser_bound</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">syn::WherePredicate</span><span class="op">></span><span class="op">></span>, |
| <span class="ident">de_bound</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">syn::WherePredicate</span><span class="op">></span><span class="op">></span>, |
| <span class="ident">borrowed_lifetimes</span>: <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">syn::Lifetime</span><span class="op">></span>, |
| <span class="ident">getter</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">syn::ExprPath</span><span class="op">></span>, |
| <span class="ident">flatten</span>: <span class="ident">bool</span>, |
| <span class="ident">transparent</span>: <span class="ident">bool</span>, |
| } |
| |
| <span class="doccomment">/// Represents the default to use for a field when deserializing.</span> |
| <span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Default</span> { |
| <span class="doccomment">/// Field must always be specified because it does not have a default.</span> |
| <span class="prelude-val">None</span>, |
| <span class="doccomment">/// The default is given by `std::default::Default::default()`.</span> |
| <span class="ident">Default</span>, |
| <span class="doccomment">/// The default is given by this function.</span> |
| <span class="ident">Path</span>(<span class="ident">syn::ExprPath</span>), |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Default</span> { |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_none</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="kw">match</span> <span class="self">self</span> { |
| <span class="ident">Default::None</span> => <span class="bool-val">true</span>, |
| <span class="ident">Default::Default</span> <span class="op">|</span> <span class="ident">Default::Path</span>(<span class="kw">_</span>) => <span class="bool-val">false</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Field</span> { |
| <span class="doccomment">/// Extract out the `#[serde(...)]` attributes from a struct field.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_ast</span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">index</span>: <span class="ident">usize</span>, |
| <span class="ident">field</span>: <span class="kw-2">&</span><span class="ident">syn::Field</span>, |
| <span class="ident">attrs</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">Variant</span><span class="op">></span>, |
| <span class="ident">container_default</span>: <span class="kw-2">&</span><span class="ident">Default</span>, |
| ) -> <span class="self">Self</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ser_name</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_name</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_aliases</span> <span class="op">=</span> <span class="ident">VecAttr::none</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">skip_serializing</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">SKIP_SERIALIZING</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">skip_deserializing</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">SKIP_DESERIALIZING</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">skip_serializing_if</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">SKIP_SERIALIZING_IF</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">default</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">DEFAULT</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">serialize_with</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">SERIALIZE_WITH</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">DESERIALIZE_WITH</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ser_bound</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">BOUND</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_bound</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">BOUND</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">borrowed_lifetimes</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">BORROW</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">getter</span> <span class="op">=</span> <span class="ident">Attr::none</span>(<span class="ident">cx</span>, <span class="ident">GETTER</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">flatten</span> <span class="op">=</span> <span class="ident">BoolAttr::none</span>(<span class="ident">cx</span>, <span class="ident">FLATTEN</span>); |
| |
| <span class="kw">let</span> <span class="ident">ident</span> <span class="op">=</span> <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">field</span>.<span class="ident">ident</span> { |
| <span class="prelude-val">Some</span>(<span class="ident">ident</span>) => <span class="ident">unraw</span>(<span class="ident">ident</span>), |
| <span class="prelude-val">None</span> => <span class="ident">index</span>.<span class="ident">to_string</span>(), |
| }; |
| |
| <span class="kw">let</span> <span class="ident">variant_borrow</span> <span class="op">=</span> <span class="ident">attrs</span> |
| .<span class="ident">and_then</span>(<span class="op">|</span><span class="ident">variant</span><span class="op">|</span> <span class="ident">variant</span>.<span class="ident">borrow</span>.<span class="ident">as_ref</span>()) |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">borrow</span><span class="op">|</span> <span class="ident">Meta</span>(<span class="ident">borrow</span>.<span class="ident">clone</span>())); |
| |
| <span class="kw">for</span> <span class="ident">meta_item</span> <span class="kw">in</span> <span class="ident">field</span> |
| .<span class="ident">attrs</span> |
| .<span class="ident">iter</span>() |
| .<span class="ident">flat_map</span>(<span class="op">|</span><span class="ident">attr</span><span class="op">|</span> <span class="ident">get_serde_meta_items</span>(<span class="ident">cx</span>, <span class="ident">attr</span>)) |
| .<span class="ident">flatten</span>() |
| .<span class="ident">chain</span>(<span class="ident">variant_borrow</span>) |
| { |
| <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">meta_item</span> { |
| <span class="comment">// Parse `#[serde(rename = "foo")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">RENAME</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">ser_name</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| <span class="ident">de_name</span>.<span class="ident">set_if_none</span>(<span class="ident">s</span>.<span class="ident">value</span>()); |
| <span class="ident">de_aliases</span>.<span class="ident">insert</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(rename(serialize = "foo", deserialize = "bar"))]`</span> |
| <span class="ident">Meta</span>(<span class="ident">List</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">RENAME</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>((<span class="ident">ser</span>, <span class="ident">de</span>)) <span class="op">=</span> <span class="ident">get_multiple_renames</span>(<span class="ident">cx</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">nested</span>) { |
| <span class="ident">ser_name</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">ser</span>.<span class="ident">map</span>(<span class="ident">syn::LitStr::value</span>)); |
| <span class="kw">for</span> <span class="ident">de_value</span> <span class="kw">in</span> <span class="ident">de</span> { |
| <span class="ident">de_name</span>.<span class="ident">set_if_none</span>(<span class="ident">de_value</span>.<span class="ident">value</span>()); |
| <span class="ident">de_aliases</span>.<span class="ident">insert</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">de_value</span>.<span class="ident">value</span>()); |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(alias = "foo")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">ALIAS</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">s</span>) <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">ALIAS</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">de_aliases</span>.<span class="ident">insert</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">s</span>.<span class="ident">value</span>()); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(default)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">DEFAULT</span> => { |
| <span class="ident">default</span>.<span class="ident">set</span>(<span class="ident">word</span>, <span class="ident">Default::Default</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(default = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">DEFAULT</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_expr_path</span>(<span class="ident">cx</span>, <span class="ident">DEFAULT</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">default</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">Default::Path</span>(<span class="ident">path</span>)); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(skip_serializing)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">SKIP_SERIALIZING</span> => { |
| <span class="ident">skip_serializing</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(skip_deserializing)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">SKIP_DESERIALIZING</span> => { |
| <span class="ident">skip_deserializing</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(skip)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">SKIP</span> => { |
| <span class="ident">skip_serializing</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| <span class="ident">skip_deserializing</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="comment">// Parse `#[serde(skip_serializing_if = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">SKIP_SERIALIZING_IF</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_expr_path</span>(<span class="ident">cx</span>, <span class="ident">SKIP_SERIALIZING_IF</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">skip_serializing_if</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">path</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(serialize_with = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">SERIALIZE_WITH</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_expr_path</span>(<span class="ident">cx</span>, <span class="ident">SERIALIZE_WITH</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">serialize_with</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">path</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(deserialize_with = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">DESERIALIZE_WITH</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_expr_path</span>(<span class="ident">cx</span>, <span class="ident">DESERIALIZE_WITH</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">deserialize_with</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">path</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(with = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">WITH</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_expr_path</span>(<span class="ident">cx</span>, <span class="ident">WITH</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ser_path</span> <span class="op">=</span> <span class="ident">path</span>.<span class="ident">clone</span>(); |
| <span class="ident">ser_path</span> |
| .<span class="ident">path</span> |
| .<span class="ident">segments</span> |
| .<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"serialize"</span>, <span class="ident">Span::call_site</span>()).<span class="ident">into</span>()); |
| <span class="ident">serialize_with</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">ser_path</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_path</span> <span class="op">=</span> <span class="ident">path</span>; |
| <span class="ident">de_path</span> |
| .<span class="ident">path</span> |
| .<span class="ident">segments</span> |
| .<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"deserialize"</span>, <span class="ident">Span::call_site</span>()).<span class="ident">into</span>()); |
| <span class="ident">deserialize_with</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">de_path</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(bound = "T: SomeBound")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">BOUND</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">where_predicates</span>) <span class="op">=</span> <span class="ident">parse_lit_into_where</span>(<span class="ident">cx</span>, <span class="ident">BOUND</span>, <span class="ident">BOUND</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">ser_bound</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">where_predicates</span>.<span class="ident">clone</span>()); |
| <span class="ident">de_bound</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">where_predicates</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(bound(serialize = "...", deserialize = "..."))]`</span> |
| <span class="ident">Meta</span>(<span class="ident">List</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">BOUND</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>((<span class="ident">ser</span>, <span class="ident">de</span>)) <span class="op">=</span> <span class="ident">get_where_predicates</span>(<span class="ident">cx</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">nested</span>) { |
| <span class="ident">ser_bound</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">ser</span>); |
| <span class="ident">de_bound</span>.<span class="ident">set_opt</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">de</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(borrow)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">BORROW</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">borrowable</span>) <span class="op">=</span> <span class="ident">borrowable_lifetimes</span>(<span class="ident">cx</span>, <span class="kw-2">&</span><span class="ident">ident</span>, <span class="ident">field</span>) { |
| <span class="ident">borrowed_lifetimes</span>.<span class="ident">set</span>(<span class="ident">word</span>, <span class="ident">borrowable</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(borrow = "'a + 'b")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">BORROW</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">lifetimes</span>) <span class="op">=</span> <span class="ident">parse_lit_into_lifetimes</span>(<span class="ident">cx</span>, <span class="ident">BORROW</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">borrowable</span>) <span class="op">=</span> <span class="ident">borrowable_lifetimes</span>(<span class="ident">cx</span>, <span class="kw-2">&</span><span class="ident">ident</span>, <span class="ident">field</span>) { |
| <span class="kw">for</span> <span class="ident">lifetime</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">lifetimes</span> { |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">borrowable</span>.<span class="ident">contains</span>(<span class="ident">lifetime</span>) { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">field</span>, |
| <span class="macro">format!</span>( |
| <span class="string">"field `{}` does not have lifetime {}"</span>, |
| <span class="ident">ident</span>, <span class="ident">lifetime</span> |
| ), |
| ); |
| } |
| } |
| <span class="ident">borrowed_lifetimes</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">lifetimes</span>); |
| } |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(getter = "...")]`</span> |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">m</span>)) <span class="kw">if</span> <span class="ident">m</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">GETTER</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">path</span>) <span class="op">=</span> <span class="ident">parse_lit_into_expr_path</span>(<span class="ident">cx</span>, <span class="ident">GETTER</span>, <span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">lit</span>) { |
| <span class="ident">getter</span>.<span class="ident">set</span>(<span class="kw-2">&</span><span class="ident">m</span>.<span class="ident">path</span>, <span class="ident">path</span>); |
| } |
| } |
| |
| <span class="comment">// Parse `#[serde(flatten)]`</span> |
| <span class="ident">Meta</span>(<span class="ident">Path</span>(<span class="ident">word</span>)) <span class="kw">if</span> <span class="ident">word</span> <span class="op">==</span> <span class="ident">FLATTEN</span> => { |
| <span class="ident">flatten</span>.<span class="ident">set_true</span>(<span class="ident">word</span>); |
| } |
| |
| <span class="ident">Meta</span>(<span class="ident">meta_item</span>) => { |
| <span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">meta_item</span> |
| .<span class="ident">path</span>() |
| .<span class="ident">into_token_stream</span>() |
| .<span class="ident">to_string</span>() |
| .<span class="ident">replace</span>(<span class="string">' '</span>, <span class="string">""</span>); |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">meta_item</span>.<span class="ident">path</span>(), |
| <span class="macro">format!</span>(<span class="string">"unknown serde field attribute `{}`"</span>, <span class="ident">path</span>), |
| ); |
| } |
| |
| <span class="ident">Lit</span>(<span class="ident">lit</span>) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">lit</span>, <span class="string">"unexpected literal in serde field attribute"</span>); |
| } |
| } |
| } |
| |
| <span class="comment">// Is skip_deserializing, initialize the field to Default::default() unless a</span> |
| <span class="comment">// different default is specified by `#[serde(default = "...")]` on</span> |
| <span class="comment">// ourselves or our container (e.g. the struct we are in).</span> |
| <span class="kw">if</span> <span class="kw">let</span> <span class="ident">Default::None</span> <span class="op">=</span> <span class="kw-2">*</span><span class="ident">container_default</span> { |
| <span class="kw">if</span> <span class="ident">skip_deserializing</span>.<span class="number">0</span>.<span class="ident">value</span>.<span class="ident">is_some</span>() { |
| <span class="ident">default</span>.<span class="ident">set_if_none</span>(<span class="ident">Default::Default</span>); |
| } |
| } |
| |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">borrowed_lifetimes</span> <span class="op">=</span> <span class="ident">borrowed_lifetimes</span>.<span class="ident">get</span>().<span class="ident">unwrap_or_default</span>(); |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">borrowed_lifetimes</span>.<span class="ident">is_empty</span>() { |
| <span class="comment">// Cow<str> and Cow<[u8]> never borrow by default:</span> |
| <span class="comment">//</span> |
| <span class="comment">// impl<'de, 'a, T: ?Sized> Deserialize<'de> for Cow<'a, T></span> |
| <span class="comment">//</span> |
| <span class="comment">// A #[serde(borrow)] attribute enables borrowing that corresponds</span> |
| <span class="comment">// roughly to these impls:</span> |
| <span class="comment">//</span> |
| <span class="comment">// impl<'de: 'a, 'a> Deserialize<'de> for Cow<'a, str></span> |
| <span class="comment">// impl<'de: 'a, 'a> Deserialize<'de> for Cow<'a, [u8]></span> |
| <span class="kw">if</span> <span class="ident">is_cow</span>(<span class="kw-2">&</span><span class="ident">field</span>.<span class="ident">ty</span>, <span class="ident">is_str</span>) { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">syn::Path</span> { |
| <span class="ident">leading_colon</span>: <span class="prelude-val">None</span>, |
| <span class="ident">segments</span>: <span class="ident">Punctuated::new</span>(), |
| }; |
| <span class="kw">let</span> <span class="ident">span</span> <span class="op">=</span> <span class="ident">Span::call_site</span>(); |
| <span class="ident">path</span>.<span class="ident">segments</span>.<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"_serde"</span>, <span class="ident">span</span>).<span class="ident">into</span>()); |
| <span class="ident">path</span>.<span class="ident">segments</span>.<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"__private"</span>, <span class="ident">span</span>).<span class="ident">into</span>()); |
| <span class="ident">path</span>.<span class="ident">segments</span>.<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"de"</span>, <span class="ident">span</span>).<span class="ident">into</span>()); |
| <span class="ident">path</span>.<span class="ident">segments</span> |
| .<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"borrow_cow_str"</span>, <span class="ident">span</span>).<span class="ident">into</span>()); |
| <span class="kw">let</span> <span class="ident">expr</span> <span class="op">=</span> <span class="ident">syn::ExprPath</span> { |
| <span class="ident">attrs</span>: <span class="ident">Vec::new</span>(), |
| <span class="ident">qself</span>: <span class="prelude-val">None</span>, |
| <span class="ident">path</span>, |
| }; |
| <span class="ident">deserialize_with</span>.<span class="ident">set_if_none</span>(<span class="ident">expr</span>); |
| } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">is_cow</span>(<span class="kw-2">&</span><span class="ident">field</span>.<span class="ident">ty</span>, <span class="ident">is_slice_u8</span>) { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">syn::Path</span> { |
| <span class="ident">leading_colon</span>: <span class="prelude-val">None</span>, |
| <span class="ident">segments</span>: <span class="ident">Punctuated::new</span>(), |
| }; |
| <span class="kw">let</span> <span class="ident">span</span> <span class="op">=</span> <span class="ident">Span::call_site</span>(); |
| <span class="ident">path</span>.<span class="ident">segments</span>.<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"_serde"</span>, <span class="ident">span</span>).<span class="ident">into</span>()); |
| <span class="ident">path</span>.<span class="ident">segments</span>.<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"__private"</span>, <span class="ident">span</span>).<span class="ident">into</span>()); |
| <span class="ident">path</span>.<span class="ident">segments</span>.<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"de"</span>, <span class="ident">span</span>).<span class="ident">into</span>()); |
| <span class="ident">path</span>.<span class="ident">segments</span> |
| .<span class="ident">push</span>(<span class="ident">Ident::new</span>(<span class="string">"borrow_cow_bytes"</span>, <span class="ident">span</span>).<span class="ident">into</span>()); |
| <span class="kw">let</span> <span class="ident">expr</span> <span class="op">=</span> <span class="ident">syn::ExprPath</span> { |
| <span class="ident">attrs</span>: <span class="ident">Vec::new</span>(), |
| <span class="ident">qself</span>: <span class="prelude-val">None</span>, |
| <span class="ident">path</span>, |
| }; |
| <span class="ident">deserialize_with</span>.<span class="ident">set_if_none</span>(<span class="ident">expr</span>); |
| } |
| } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">is_implicitly_borrowed</span>(<span class="kw-2">&</span><span class="ident">field</span>.<span class="ident">ty</span>) { |
| <span class="comment">// Types &str and &[u8] are always implicitly borrowed. No need for</span> |
| <span class="comment">// a #[serde(borrow)].</span> |
| <span class="ident">collect_lifetimes</span>(<span class="kw-2">&</span><span class="ident">field</span>.<span class="ident">ty</span>, <span class="kw-2">&mut</span> <span class="ident">borrowed_lifetimes</span>); |
| } |
| |
| <span class="ident">Field</span> { |
| <span class="ident">name</span>: <span class="ident">Name::from_attrs</span>(<span class="ident">ident</span>, <span class="ident">ser_name</span>, <span class="ident">de_name</span>, <span class="prelude-val">Some</span>(<span class="ident">de_aliases</span>)), |
| <span class="ident">skip_serializing</span>: <span class="ident">skip_serializing</span>.<span class="ident">get</span>(), |
| <span class="ident">skip_deserializing</span>: <span class="ident">skip_deserializing</span>.<span class="ident">get</span>(), |
| <span class="ident">skip_serializing_if</span>: <span class="ident">skip_serializing_if</span>.<span class="ident">get</span>(), |
| <span class="ident">default</span>: <span class="ident">default</span>.<span class="ident">get</span>().<span class="ident">unwrap_or</span>(<span class="ident">Default::None</span>), |
| <span class="ident">serialize_with</span>: <span class="ident">serialize_with</span>.<span class="ident">get</span>(), |
| <span class="ident">deserialize_with</span>: <span class="ident">deserialize_with</span>.<span class="ident">get</span>(), |
| <span class="ident">ser_bound</span>: <span class="ident">ser_bound</span>.<span class="ident">get</span>(), |
| <span class="ident">de_bound</span>: <span class="ident">de_bound</span>.<span class="ident">get</span>(), |
| <span class="ident">borrowed_lifetimes</span>, |
| <span class="ident">getter</span>: <span class="ident">getter</span>.<span class="ident">get</span>(), |
| <span class="ident">flatten</span>: <span class="ident">flatten</span>.<span class="ident">get</span>(), |
| <span class="ident">transparent</span>: <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">name</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident">Name</span> { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">name</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">aliases</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">Vec</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">name</span>.<span class="ident">deserialize_aliases</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">rename_by_rules</span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">rules</span>: <span class="kw-2">&</span><span class="ident">RenameAllRules</span>) { |
| <span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">name</span>.<span class="ident">serialize_renamed</span> { |
| <span class="self">self</span>.<span class="ident">name</span>.<span class="ident">serialize</span> <span class="op">=</span> <span class="ident">rules</span>.<span class="ident">serialize</span>.<span class="ident">apply_to_field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">name</span>.<span class="ident">serialize</span>); |
| } |
| <span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">name</span>.<span class="ident">deserialize_renamed</span> { |
| <span class="self">self</span>.<span class="ident">name</span>.<span class="ident">deserialize</span> <span class="op">=</span> <span class="ident">rules</span>.<span class="ident">deserialize</span>.<span class="ident">apply_to_field</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">name</span>.<span class="ident">deserialize</span>); |
| } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">skip_serializing</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">skip_serializing</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">skip_deserializing</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">skip_deserializing</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">skip_serializing_if</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::ExprPath</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">skip_serializing_if</span>.<span class="ident">as_ref</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">default</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident">Default</span> { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">default</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">serialize_with</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::ExprPath</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">serialize_with</span>.<span class="ident">as_ref</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">deserialize_with</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::ExprPath</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">deserialize_with</span>.<span class="ident">as_ref</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">ser_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span>[<span class="ident">syn::WherePredicate</span>]<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">ser_bound</span>.<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">vec</span><span class="op">|</span> <span class="kw-2">&</span><span class="ident">vec</span>[..]) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">de_bound</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span>[<span class="ident">syn::WherePredicate</span>]<span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">de_bound</span>.<span class="ident">as_ref</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">vec</span><span class="op">|</span> <span class="kw-2">&</span><span class="ident">vec</span>[..]) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">borrowed_lifetimes</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">syn::Lifetime</span><span class="op">></span> { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">borrowed_lifetimes</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">getter</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">syn::ExprPath</span><span class="op">></span> { |
| <span class="self">self</span>.<span class="ident">getter</span>.<span class="ident">as_ref</span>() |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">flatten</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">flatten</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">transparent</span>(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">transparent</span> |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">mark_transparent</span>(<span class="kw-2">&mut</span> <span class="self">self</span>) { |
| <span class="self">self</span>.<span class="ident">transparent</span> <span class="op">=</span> <span class="bool-val">true</span>; |
| } |
| } |
| |
| <span class="kw">type</span> <span class="ident">SerAndDe</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="op">=</span> (<span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>); |
| |
| <span class="kw">fn</span> <span class="ident">get_ser_and_de</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="lifetime">'b</span>, <span class="ident">T</span>, <span class="ident">F</span><span class="op">></span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="lifetime">'b</span> <span class="ident">Ctxt</span>, |
| <span class="ident">attr_name</span>: <span class="ident">Symbol</span>, |
| <span class="ident">metas</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Punctuated</span><span class="op"><</span><span class="ident">syn::NestedMeta</span>, <span class="macro">Token!</span>[,]<span class="op">></span>, |
| <span class="ident">f</span>: <span class="ident">F</span>, |
| ) -> <span class="prelude-ty">Result</span><span class="op"><</span>(<span class="ident">VecAttr</span><span class="op"><</span><span class="lifetime">'b</span>, <span class="ident">T</span><span class="op">></span>, <span class="ident">VecAttr</span><span class="op"><</span><span class="lifetime">'b</span>, <span class="ident">T</span><span class="op">></span>), ()<span class="op">></span> |
| <span class="kw">where</span> |
| <span class="ident">T</span>: <span class="lifetime">'a</span>, |
| <span class="ident">F</span>: <span class="ident">Fn</span>(<span class="kw-2">&</span><span class="ident">Ctxt</span>, <span class="ident">Symbol</span>, <span class="ident">Symbol</span>, <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">syn::Lit</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">T</span>, ()<span class="op">></span>, |
| { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ser_meta</span> <span class="op">=</span> <span class="ident">VecAttr::none</span>(<span class="ident">cx</span>, <span class="ident">attr_name</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">de_meta</span> <span class="op">=</span> <span class="ident">VecAttr::none</span>(<span class="ident">cx</span>, <span class="ident">attr_name</span>); |
| |
| <span class="kw">for</span> <span class="ident">meta</span> <span class="kw">in</span> <span class="ident">metas</span> { |
| <span class="kw">match</span> <span class="ident">meta</span> { |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">meta</span>)) <span class="kw">if</span> <span class="ident">meta</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">SERIALIZE</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">v</span>) <span class="op">=</span> <span class="ident">f</span>(<span class="ident">cx</span>, <span class="ident">attr_name</span>, <span class="ident">SERIALIZE</span>, <span class="kw-2">&</span><span class="ident">meta</span>.<span class="ident">lit</span>) { |
| <span class="ident">ser_meta</span>.<span class="ident">insert</span>(<span class="kw-2">&</span><span class="ident">meta</span>.<span class="ident">path</span>, <span class="ident">v</span>); |
| } |
| } |
| |
| <span class="ident">Meta</span>(<span class="ident">NameValue</span>(<span class="ident">meta</span>)) <span class="kw">if</span> <span class="ident">meta</span>.<span class="ident">path</span> <span class="op">==</span> <span class="ident">DESERIALIZE</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">v</span>) <span class="op">=</span> <span class="ident">f</span>(<span class="ident">cx</span>, <span class="ident">attr_name</span>, <span class="ident">DESERIALIZE</span>, <span class="kw-2">&</span><span class="ident">meta</span>.<span class="ident">lit</span>) { |
| <span class="ident">de_meta</span>.<span class="ident">insert</span>(<span class="kw-2">&</span><span class="ident">meta</span>.<span class="ident">path</span>, <span class="ident">v</span>); |
| } |
| } |
| |
| <span class="kw">_</span> => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">meta</span>, |
| <span class="macro">format!</span>( |
| <span class="string">"malformed {0} attribute, expected `{0}(serialize = ..., deserialize = ...)`"</span>, |
| <span class="ident">attr_name</span> |
| ), |
| ); |
| <span class="kw">return</span> <span class="prelude-val">Err</span>(()); |
| } |
| } |
| } |
| |
| <span class="prelude-val">Ok</span>((<span class="ident">ser_meta</span>, <span class="ident">de_meta</span>)) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">get_renames</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">items</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Punctuated</span><span class="op"><</span><span class="ident">syn::NestedMeta</span>, <span class="macro">Token!</span>[,]<span class="op">></span>, |
| ) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">SerAndDe</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">syn::LitStr</span><span class="op">></span>, ()<span class="op">></span> { |
| <span class="kw">let</span> (<span class="ident">ser</span>, <span class="ident">de</span>) <span class="op">=</span> <span class="ident">get_ser_and_de</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>, <span class="ident">items</span>, <span class="ident">get_lit_str2</span>)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>((<span class="ident">ser</span>.<span class="ident">at_most_one</span>()<span class="question-mark">?</span>, <span class="ident">de</span>.<span class="ident">at_most_one</span>()<span class="question-mark">?</span>)) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">get_multiple_renames</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">items</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Punctuated</span><span class="op"><</span><span class="ident">syn::NestedMeta</span>, <span class="macro">Token!</span>[,]<span class="op">></span>, |
| ) -> <span class="prelude-ty">Result</span><span class="op"><</span>(<span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">syn::LitStr</span><span class="op">></span>, <span class="ident">Vec</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">syn::LitStr</span><span class="op">></span>), ()<span class="op">></span> { |
| <span class="kw">let</span> (<span class="ident">ser</span>, <span class="ident">de</span>) <span class="op">=</span> <span class="ident">get_ser_and_de</span>(<span class="ident">cx</span>, <span class="ident">RENAME</span>, <span class="ident">items</span>, <span class="ident">get_lit_str2</span>)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>((<span class="ident">ser</span>.<span class="ident">at_most_one</span>()<span class="question-mark">?</span>, <span class="ident">de</span>.<span class="ident">get</span>())) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">get_where_predicates</span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">items</span>: <span class="kw-2">&</span><span class="ident">Punctuated</span><span class="op"><</span><span class="ident">syn::NestedMeta</span>, <span class="macro">Token!</span>[,]<span class="op">></span>, |
| ) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">SerAndDe</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">syn::WherePredicate</span><span class="op">></span><span class="op">></span>, ()<span class="op">></span> { |
| <span class="kw">let</span> (<span class="ident">ser</span>, <span class="ident">de</span>) <span class="op">=</span> <span class="ident">get_ser_and_de</span>(<span class="ident">cx</span>, <span class="ident">BOUND</span>, <span class="ident">items</span>, <span class="ident">parse_lit_into_where</span>)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>((<span class="ident">ser</span>.<span class="ident">at_most_one</span>()<span class="question-mark">?</span>, <span class="ident">de</span>.<span class="ident">at_most_one</span>()<span class="question-mark">?</span>)) |
| } |
| |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_serde_meta_items</span>(<span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, <span class="ident">attr</span>: <span class="kw-2">&</span><span class="ident">syn::Attribute</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">syn::NestedMeta</span><span class="op">></span>, ()<span class="op">></span> { |
| <span class="kw">if</span> <span class="ident">attr</span>.<span class="ident">path</span> <span class="op">!</span><span class="op">=</span> <span class="ident">SERDE</span> { |
| <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Vec::new</span>()); |
| } |
| |
| <span class="kw">match</span> <span class="ident">attr</span>.<span class="ident">parse_meta</span>() { |
| <span class="prelude-val">Ok</span>(<span class="ident">List</span>(<span class="ident">meta</span>)) => <span class="prelude-val">Ok</span>(<span class="ident">meta</span>.<span class="ident">nested</span>.<span class="ident">into_iter</span>().<span class="ident">collect</span>()), |
| <span class="prelude-val">Ok</span>(<span class="ident">other</span>) => { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">other</span>, <span class="string">"expected #[serde(...)]"</span>); |
| <span class="prelude-val">Err</span>(()) |
| } |
| <span class="prelude-val">Err</span>(<span class="ident">err</span>) => { |
| <span class="ident">cx</span>.<span class="ident">syn_error</span>(<span class="ident">err</span>); |
| <span class="prelude-val">Err</span>(()) |
| } |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">get_lit_str</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>(<span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, <span class="ident">attr_name</span>: <span class="ident">Symbol</span>, <span class="ident">lit</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">syn::Lit</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">syn::LitStr</span>, ()<span class="op">></span> { |
| <span class="ident">get_lit_str2</span>(<span class="ident">cx</span>, <span class="ident">attr_name</span>, <span class="ident">attr_name</span>, <span class="ident">lit</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">get_lit_str2</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">attr_name</span>: <span class="ident">Symbol</span>, |
| <span class="ident">meta_item_name</span>: <span class="ident">Symbol</span>, |
| <span class="ident">lit</span>: <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">syn::Lit</span>, |
| ) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">syn::LitStr</span>, ()<span class="op">></span> { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="ident">syn::Lit::Str</span>(<span class="ident">lit</span>) <span class="op">=</span> <span class="ident">lit</span> { |
| <span class="prelude-val">Ok</span>(<span class="ident">lit</span>) |
| } <span class="kw">else</span> { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">lit</span>, |
| <span class="macro">format!</span>( |
| <span class="string">"expected serde {} attribute to be a string: `{} = \"...\"`"</span>, |
| <span class="ident">attr_name</span>, <span class="ident">meta_item_name</span> |
| ), |
| ); |
| <span class="prelude-val">Err</span>(()) |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">parse_lit_into_path</span>(<span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, <span class="ident">attr_name</span>: <span class="ident">Symbol</span>, <span class="ident">lit</span>: <span class="kw-2">&</span><span class="ident">syn::Lit</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">syn::Path</span>, ()<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">string</span> <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">attr_name</span>, <span class="ident">lit</span>)<span class="question-mark">?</span>; |
| <span class="ident">parse_lit_str</span>(<span class="ident">string</span>).<span class="ident">map_err</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">lit</span>, <span class="macro">format!</span>(<span class="string">"failed to parse path: {:?}"</span>, <span class="ident">string</span>.<span class="ident">value</span>())); |
| }) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">parse_lit_into_expr_path</span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">attr_name</span>: <span class="ident">Symbol</span>, |
| <span class="ident">lit</span>: <span class="kw-2">&</span><span class="ident">syn::Lit</span>, |
| ) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">syn::ExprPath</span>, ()<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">string</span> <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">attr_name</span>, <span class="ident">lit</span>)<span class="question-mark">?</span>; |
| <span class="ident">parse_lit_str</span>(<span class="ident">string</span>).<span class="ident">map_err</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">lit</span>, <span class="macro">format!</span>(<span class="string">"failed to parse path: {:?}"</span>, <span class="ident">string</span>.<span class="ident">value</span>())); |
| }) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">parse_lit_into_where</span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">attr_name</span>: <span class="ident">Symbol</span>, |
| <span class="ident">meta_item_name</span>: <span class="ident">Symbol</span>, |
| <span class="ident">lit</span>: <span class="kw-2">&</span><span class="ident">syn::Lit</span>, |
| ) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">syn::WherePredicate</span><span class="op">></span>, ()<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">string</span> <span class="op">=</span> <span class="ident">get_lit_str2</span>(<span class="ident">cx</span>, <span class="ident">attr_name</span>, <span class="ident">meta_item_name</span>, <span class="ident">lit</span>)<span class="question-mark">?</span>; |
| <span class="kw">if</span> <span class="ident">string</span>.<span class="ident">value</span>().<span class="ident">is_empty</span>() { |
| <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">Vec::new</span>()); |
| } |
| |
| <span class="kw">let</span> <span class="ident">where_string</span> <span class="op">=</span> <span class="ident">syn::LitStr::new</span>(<span class="kw-2">&</span><span class="macro">format!</span>(<span class="string">"where {}"</span>, <span class="ident">string</span>.<span class="ident">value</span>()), <span class="ident">string</span>.<span class="ident">span</span>()); |
| |
| <span class="ident">parse_lit_str</span>::<span class="op"><</span><span class="ident">syn::WhereClause</span><span class="op">></span>(<span class="kw-2">&</span><span class="ident">where_string</span>) |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">wh</span><span class="op">|</span> <span class="ident">wh</span>.<span class="ident">predicates</span>.<span class="ident">into_iter</span>().<span class="ident">collect</span>()) |
| .<span class="ident">map_err</span>(<span class="op">|</span><span class="ident">err</span><span class="op">|</span> <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">lit</span>, <span class="ident">err</span>)) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">parse_lit_into_ty</span>(<span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, <span class="ident">attr_name</span>: <span class="ident">Symbol</span>, <span class="ident">lit</span>: <span class="kw-2">&</span><span class="ident">syn::Lit</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">syn::Type</span>, ()<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">string</span> <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">attr_name</span>, <span class="ident">lit</span>)<span class="question-mark">?</span>; |
| |
| <span class="ident">parse_lit_str</span>(<span class="ident">string</span>).<span class="ident">map_err</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">lit</span>, |
| <span class="macro">format!</span>(<span class="string">"failed to parse type: {} = {:?}"</span>, <span class="ident">attr_name</span>, <span class="ident">string</span>.<span class="ident">value</span>()), |
| ); |
| }) |
| } |
| |
| <span class="comment">// Parses a string literal like "'a + 'b + 'c" containing a nonempty list of</span> |
| <span class="comment">// lifetimes separated by `+`.</span> |
| <span class="kw">fn</span> <span class="ident">parse_lit_into_lifetimes</span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">attr_name</span>: <span class="ident">Symbol</span>, |
| <span class="ident">lit</span>: <span class="kw-2">&</span><span class="ident">syn::Lit</span>, |
| ) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">syn::Lifetime</span><span class="op">></span>, ()<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">string</span> <span class="op">=</span> <span class="ident">get_lit_str</span>(<span class="ident">cx</span>, <span class="ident">attr_name</span>, <span class="ident">lit</span>)<span class="question-mark">?</span>; |
| <span class="kw">if</span> <span class="ident">string</span>.<span class="ident">value</span>().<span class="ident">is_empty</span>() { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">lit</span>, <span class="string">"at least one lifetime must be borrowed"</span>); |
| <span class="kw">return</span> <span class="prelude-val">Err</span>(()); |
| } |
| |
| <span class="kw">struct</span> <span class="ident">BorrowedLifetimes</span>(<span class="ident">Punctuated</span><span class="op"><</span><span class="ident">syn::Lifetime</span>, <span class="macro">Token!</span>[<span class="op">+</span>]<span class="op">></span>); |
| |
| <span class="kw">impl</span> <span class="ident">Parse</span> <span class="kw">for</span> <span class="ident">BorrowedLifetimes</span> { |
| <span class="kw">fn</span> <span class="ident">parse</span>(<span class="ident">input</span>: <span class="ident">ParseStream</span>) -> <span class="ident">parse::Result</span><span class="op"><</span><span class="self">Self</span><span class="op">></span> { |
| <span class="ident">Punctuated::parse_separated_nonempty</span>(<span class="ident">input</span>).<span class="ident">map</span>(<span class="ident">BorrowedLifetimes</span>) |
| } |
| } |
| |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">BorrowedLifetimes</span>(<span class="ident">lifetimes</span>)) <span class="op">=</span> <span class="ident">parse_lit_str</span>(<span class="ident">string</span>) { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">set</span> <span class="op">=</span> <span class="ident">BTreeSet::new</span>(); |
| <span class="kw">for</span> <span class="ident">lifetime</span> <span class="kw">in</span> <span class="ident">lifetimes</span> { |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">set</span>.<span class="ident">insert</span>(<span class="ident">lifetime</span>.<span class="ident">clone</span>()) { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>(<span class="ident">lit</span>, <span class="macro">format!</span>(<span class="string">"duplicate borrowed lifetime `{}`"</span>, <span class="ident">lifetime</span>)); |
| } |
| } |
| <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">set</span>); |
| } |
| |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">lit</span>, |
| <span class="macro">format!</span>(<span class="string">"failed to parse borrowed lifetimes: {:?}"</span>, <span class="ident">string</span>.<span class="ident">value</span>()), |
| ); |
| <span class="prelude-val">Err</span>(()) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">is_implicitly_borrowed</span>(<span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">syn::Type</span>) -> <span class="ident">bool</span> { |
| <span class="ident">is_implicitly_borrowed_reference</span>(<span class="ident">ty</span>) <span class="op">|</span><span class="op">|</span> <span class="ident">is_option</span>(<span class="ident">ty</span>, <span class="ident">is_implicitly_borrowed_reference</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">is_implicitly_borrowed_reference</span>(<span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">syn::Type</span>) -> <span class="ident">bool</span> { |
| <span class="ident">is_reference</span>(<span class="ident">ty</span>, <span class="ident">is_str</span>) <span class="op">|</span><span class="op">|</span> <span class="ident">is_reference</span>(<span class="ident">ty</span>, <span class="ident">is_slice_u8</span>) |
| } |
| |
| <span class="comment">// Whether the type looks like it might be `std::borrow::Cow<T>` where elem="T".</span> |
| <span class="comment">// This can have false negatives and false positives.</span> |
| <span class="comment">//</span> |
| <span class="comment">// False negative:</span> |
| <span class="comment">//</span> |
| <span class="comment">// use std::borrow::Cow as Pig;</span> |
| <span class="comment">//</span> |
| <span class="comment">// #[derive(Deserialize)]</span> |
| <span class="comment">// struct S<'a> {</span> |
| <span class="comment">// #[serde(borrow)]</span> |
| <span class="comment">// pig: Pig<'a, str>,</span> |
| <span class="comment">// }</span> |
| <span class="comment">//</span> |
| <span class="comment">// False positive:</span> |
| <span class="comment">//</span> |
| <span class="comment">// type str = [i16];</span> |
| <span class="comment">//</span> |
| <span class="comment">// #[derive(Deserialize)]</span> |
| <span class="comment">// struct S<'a> {</span> |
| <span class="comment">// #[serde(borrow)]</span> |
| <span class="comment">// cow: Cow<'a, str>,</span> |
| <span class="comment">// }</span> |
| <span class="kw">fn</span> <span class="ident">is_cow</span>(<span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">syn::Type</span>, <span class="ident">elem</span>: <span class="kw">fn</span>(<span class="kw-2">&</span><span class="ident">syn::Type</span>) -> <span class="ident">bool</span>) -> <span class="ident">bool</span> { |
| <span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">ungroup</span>(<span class="ident">ty</span>) { |
| <span class="ident">syn::Type::Path</span>(<span class="ident">ty</span>) => <span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">path</span>, |
| <span class="kw">_</span> => { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| }; |
| <span class="kw">let</span> <span class="ident">seg</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">path</span>.<span class="ident">segments</span>.<span class="ident">last</span>() { |
| <span class="prelude-val">Some</span>(<span class="ident">seg</span>) => <span class="ident">seg</span>, |
| <span class="prelude-val">None</span> => { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| }; |
| <span class="kw">let</span> <span class="ident">args</span> <span class="op">=</span> <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">seg</span>.<span class="ident">arguments</span> { |
| <span class="ident">syn::PathArguments::AngleBracketed</span>(<span class="ident">bracketed</span>) => <span class="kw-2">&</span><span class="ident">bracketed</span>.<span class="ident">args</span>, |
| <span class="kw">_</span> => { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| }; |
| <span class="ident">seg</span>.<span class="ident">ident</span> <span class="op">==</span> <span class="string">"Cow"</span> |
| <span class="op">&&</span> <span class="ident">args</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">2</span> |
| <span class="op">&&</span> <span class="kw">match</span> (<span class="kw-2">&</span><span class="ident">args</span>[<span class="number">0</span>], <span class="kw-2">&</span><span class="ident">args</span>[<span class="number">1</span>]) { |
| (<span class="ident">syn::GenericArgument::Lifetime</span>(<span class="kw">_</span>), <span class="ident">syn::GenericArgument::Type</span>(<span class="ident">arg</span>)) => <span class="ident">elem</span>(<span class="ident">arg</span>), |
| <span class="kw">_</span> => <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">is_option</span>(<span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">syn::Type</span>, <span class="ident">elem</span>: <span class="kw">fn</span>(<span class="kw-2">&</span><span class="ident">syn::Type</span>) -> <span class="ident">bool</span>) -> <span class="ident">bool</span> { |
| <span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">ungroup</span>(<span class="ident">ty</span>) { |
| <span class="ident">syn::Type::Path</span>(<span class="ident">ty</span>) => <span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">path</span>, |
| <span class="kw">_</span> => { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| }; |
| <span class="kw">let</span> <span class="ident">seg</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">path</span>.<span class="ident">segments</span>.<span class="ident">last</span>() { |
| <span class="prelude-val">Some</span>(<span class="ident">seg</span>) => <span class="ident">seg</span>, |
| <span class="prelude-val">None</span> => { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| }; |
| <span class="kw">let</span> <span class="ident">args</span> <span class="op">=</span> <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">seg</span>.<span class="ident">arguments</span> { |
| <span class="ident">syn::PathArguments::AngleBracketed</span>(<span class="ident">bracketed</span>) => <span class="kw-2">&</span><span class="ident">bracketed</span>.<span class="ident">args</span>, |
| <span class="kw">_</span> => { |
| <span class="kw">return</span> <span class="bool-val">false</span>; |
| } |
| }; |
| <span class="ident">seg</span>.<span class="ident">ident</span> <span class="op">==</span> <span class="string">"Option"</span> |
| <span class="op">&&</span> <span class="ident">args</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">1</span> |
| <span class="op">&&</span> <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">args</span>[<span class="number">0</span>] { |
| <span class="ident">syn::GenericArgument::Type</span>(<span class="ident">arg</span>) => <span class="ident">elem</span>(<span class="ident">arg</span>), |
| <span class="kw">_</span> => <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="comment">// Whether the type looks like it might be `&T` where elem="T". This can have</span> |
| <span class="comment">// false negatives and false positives.</span> |
| <span class="comment">//</span> |
| <span class="comment">// False negative:</span> |
| <span class="comment">//</span> |
| <span class="comment">// type Yarn = str;</span> |
| <span class="comment">//</span> |
| <span class="comment">// #[derive(Deserialize)]</span> |
| <span class="comment">// struct S<'a> {</span> |
| <span class="comment">// r: &'a Yarn,</span> |
| <span class="comment">// }</span> |
| <span class="comment">//</span> |
| <span class="comment">// False positive:</span> |
| <span class="comment">//</span> |
| <span class="comment">// type str = [i16];</span> |
| <span class="comment">//</span> |
| <span class="comment">// #[derive(Deserialize)]</span> |
| <span class="comment">// struct S<'a> {</span> |
| <span class="comment">// r: &'a str,</span> |
| <span class="comment">// }</span> |
| <span class="kw">fn</span> <span class="ident">is_reference</span>(<span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">syn::Type</span>, <span class="ident">elem</span>: <span class="kw">fn</span>(<span class="kw-2">&</span><span class="ident">syn::Type</span>) -> <span class="ident">bool</span>) -> <span class="ident">bool</span> { |
| <span class="kw">match</span> <span class="ident">ungroup</span>(<span class="ident">ty</span>) { |
| <span class="ident">syn::Type::Reference</span>(<span class="ident">ty</span>) => <span class="ident">ty</span>.<span class="ident">mutability</span>.<span class="ident">is_none</span>() <span class="op">&&</span> <span class="ident">elem</span>(<span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">elem</span>), |
| <span class="kw">_</span> => <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">is_str</span>(<span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">syn::Type</span>) -> <span class="ident">bool</span> { |
| <span class="ident">is_primitive_type</span>(<span class="ident">ty</span>, <span class="string">"str"</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">is_slice_u8</span>(<span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">syn::Type</span>) -> <span class="ident">bool</span> { |
| <span class="kw">match</span> <span class="ident">ungroup</span>(<span class="ident">ty</span>) { |
| <span class="ident">syn::Type::Slice</span>(<span class="ident">ty</span>) => <span class="ident">is_primitive_type</span>(<span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">elem</span>, <span class="string">"u8"</span>), |
| <span class="kw">_</span> => <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">is_primitive_type</span>(<span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">syn::Type</span>, <span class="ident">primitive</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">bool</span> { |
| <span class="kw">match</span> <span class="ident">ungroup</span>(<span class="ident">ty</span>) { |
| <span class="ident">syn::Type::Path</span>(<span class="ident">ty</span>) => <span class="ident">ty</span>.<span class="ident">qself</span>.<span class="ident">is_none</span>() <span class="op">&&</span> <span class="ident">is_primitive_path</span>(<span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">path</span>, <span class="ident">primitive</span>), |
| <span class="kw">_</span> => <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">is_primitive_path</span>(<span class="ident">path</span>: <span class="kw-2">&</span><span class="ident">syn::Path</span>, <span class="ident">primitive</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">bool</span> { |
| <span class="ident">path</span>.<span class="ident">leading_colon</span>.<span class="ident">is_none</span>() |
| <span class="op">&&</span> <span class="ident">path</span>.<span class="ident">segments</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">1</span> |
| <span class="op">&&</span> <span class="ident">path</span>.<span class="ident">segments</span>[<span class="number">0</span>].<span class="ident">ident</span> <span class="op">==</span> <span class="ident">primitive</span> |
| <span class="op">&&</span> <span class="ident">path</span>.<span class="ident">segments</span>[<span class="number">0</span>].<span class="ident">arguments</span>.<span class="ident">is_empty</span>() |
| } |
| |
| <span class="comment">// All lifetimes that this type could borrow from a Deserializer.</span> |
| <span class="comment">//</span> |
| <span class="comment">// For example a type `S<'a, 'b>` could borrow `'a` and `'b`. On the other hand</span> |
| <span class="comment">// a type `for<'a> fn(&'a str)` could not borrow `'a` from the Deserializer.</span> |
| <span class="comment">//</span> |
| <span class="comment">// This is used when there is an explicit or implicit `#[serde(borrow)]`</span> |
| <span class="comment">// attribute on the field so there must be at least one borrowable lifetime.</span> |
| <span class="kw">fn</span> <span class="ident">borrowable_lifetimes</span>( |
| <span class="ident">cx</span>: <span class="kw-2">&</span><span class="ident">Ctxt</span>, |
| <span class="ident">name</span>: <span class="kw-2">&</span><span class="ident">str</span>, |
| <span class="ident">field</span>: <span class="kw-2">&</span><span class="ident">syn::Field</span>, |
| ) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">syn::Lifetime</span><span class="op">></span>, ()<span class="op">></span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lifetimes</span> <span class="op">=</span> <span class="ident">BTreeSet::new</span>(); |
| <span class="ident">collect_lifetimes</span>(<span class="kw-2">&</span><span class="ident">field</span>.<span class="ident">ty</span>, <span class="kw-2">&mut</span> <span class="ident">lifetimes</span>); |
| <span class="kw">if</span> <span class="ident">lifetimes</span>.<span class="ident">is_empty</span>() { |
| <span class="ident">cx</span>.<span class="ident">error_spanned_by</span>( |
| <span class="ident">field</span>, |
| <span class="macro">format!</span>(<span class="string">"field `{}` has no lifetimes to borrow"</span>, <span class="ident">name</span>), |
| ); |
| <span class="prelude-val">Err</span>(()) |
| } <span class="kw">else</span> { |
| <span class="prelude-val">Ok</span>(<span class="ident">lifetimes</span>) |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">collect_lifetimes</span>(<span class="ident">ty</span>: <span class="kw-2">&</span><span class="ident">syn::Type</span>, <span class="ident">out</span>: <span class="kw-2">&mut</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">syn::Lifetime</span><span class="op">></span>) { |
| <span class="kw">match</span> <span class="ident">ty</span> { |
| <span class="ident">syn::Type::Slice</span>(<span class="ident">ty</span>) => { |
| <span class="ident">collect_lifetimes</span>(<span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">elem</span>, <span class="ident">out</span>); |
| } |
| <span class="ident">syn::Type::Array</span>(<span class="ident">ty</span>) => { |
| <span class="ident">collect_lifetimes</span>(<span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">elem</span>, <span class="ident">out</span>); |
| } |
| <span class="ident">syn::Type::Ptr</span>(<span class="ident">ty</span>) => { |
| <span class="ident">collect_lifetimes</span>(<span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">elem</span>, <span class="ident">out</span>); |
| } |
| <span class="ident">syn::Type::Reference</span>(<span class="ident">ty</span>) => { |
| <span class="ident">out</span>.<span class="ident">extend</span>(<span class="ident">ty</span>.<span class="ident">lifetime</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>()); |
| <span class="ident">collect_lifetimes</span>(<span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">elem</span>, <span class="ident">out</span>); |
| } |
| <span class="ident">syn::Type::Tuple</span>(<span class="ident">ty</span>) => { |
| <span class="kw">for</span> <span class="ident">elem</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">elems</span> { |
| <span class="ident">collect_lifetimes</span>(<span class="ident">elem</span>, <span class="ident">out</span>); |
| } |
| } |
| <span class="ident">syn::Type::Path</span>(<span class="ident">ty</span>) => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">qself</span>) <span class="op">=</span> <span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">qself</span> { |
| <span class="ident">collect_lifetimes</span>(<span class="kw-2">&</span><span class="ident">qself</span>.<span class="ident">ty</span>, <span class="ident">out</span>); |
| } |
| <span class="kw">for</span> <span class="ident">seg</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">path</span>.<span class="ident">segments</span> { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="ident">syn::PathArguments::AngleBracketed</span>(<span class="ident">bracketed</span>) <span class="op">=</span> <span class="kw-2">&</span><span class="ident">seg</span>.<span class="ident">arguments</span> { |
| <span class="kw">for</span> <span class="ident">arg</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">bracketed</span>.<span class="ident">args</span> { |
| <span class="kw">match</span> <span class="ident">arg</span> { |
| <span class="ident">syn::GenericArgument::Lifetime</span>(<span class="ident">lifetime</span>) => { |
| <span class="ident">out</span>.<span class="ident">insert</span>(<span class="ident">lifetime</span>.<span class="ident">clone</span>()); |
| } |
| <span class="ident">syn::GenericArgument::Type</span>(<span class="ident">ty</span>) => { |
| <span class="ident">collect_lifetimes</span>(<span class="ident">ty</span>, <span class="ident">out</span>); |
| } |
| <span class="ident">syn::GenericArgument::Binding</span>(<span class="ident">binding</span>) => { |
| <span class="ident">collect_lifetimes</span>(<span class="kw-2">&</span><span class="ident">binding</span>.<span class="ident">ty</span>, <span class="ident">out</span>); |
| } |
| <span class="ident">syn::GenericArgument::Constraint</span>(<span class="kw">_</span>) |
| <span class="op">|</span> <span class="ident">syn::GenericArgument::Const</span>(<span class="kw">_</span>) => {} |
| } |
| } |
| } |
| } |
| } |
| <span class="ident">syn::Type::Paren</span>(<span class="ident">ty</span>) => { |
| <span class="ident">collect_lifetimes</span>(<span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">elem</span>, <span class="ident">out</span>); |
| } |
| <span class="ident">syn::Type::Group</span>(<span class="ident">ty</span>) => { |
| <span class="ident">collect_lifetimes</span>(<span class="kw-2">&</span><span class="ident">ty</span>.<span class="ident">elem</span>, <span class="ident">out</span>); |
| } |
| <span class="ident">syn::Type::Macro</span>(<span class="ident">ty</span>) => { |
| <span class="ident">collect_lifetimes_from_tokens</span>(<span class="ident">ty</span>.<span class="ident">mac</span>.<span class="ident">tokens</span>.<span class="ident">clone</span>(), <span class="ident">out</span>); |
| } |
| <span class="ident">syn::Type::BareFn</span>(<span class="kw">_</span>) |
| <span class="op">|</span> <span class="ident">syn::Type::Never</span>(<span class="kw">_</span>) |
| <span class="op">|</span> <span class="ident">syn::Type::TraitObject</span>(<span class="kw">_</span>) |
| <span class="op">|</span> <span class="ident">syn::Type::ImplTrait</span>(<span class="kw">_</span>) |
| <span class="op">|</span> <span class="ident">syn::Type::Infer</span>(<span class="kw">_</span>) |
| <span class="op">|</span> <span class="ident">syn::Type::Verbatim</span>(<span class="kw">_</span>) => {} |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span> |
| <span class="ident">syn::Type::__TestExhaustive</span>(<span class="kw">_</span>) => <span class="macro">unimplemented!</span>(), |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">test</span>))]</span> |
| <span class="kw">_</span> => {} |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">collect_lifetimes_from_tokens</span>(<span class="ident">tokens</span>: <span class="ident">TokenStream</span>, <span class="ident">out</span>: <span class="kw-2">&mut</span> <span class="ident">BTreeSet</span><span class="op"><</span><span class="ident">syn::Lifetime</span><span class="op">></span>) { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">tokens</span>.<span class="ident">into_iter</span>(); |
| <span class="kw">while</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">tt</span>) <span class="op">=</span> <span class="ident">iter</span>.<span class="ident">next</span>() { |
| <span class="kw">match</span> <span class="kw-2">&</span><span class="ident">tt</span> { |
| <span class="ident">TokenTree::Punct</span>(<span class="ident">op</span>) <span class="kw">if</span> <span class="ident">op</span>.<span class="ident">as_char</span>() <span class="op">==</span> <span class="string">'\''</span> <span class="op">&&</span> <span class="ident">op</span>.<span class="ident">spacing</span>() <span class="op">==</span> <span class="ident">Spacing::Joint</span> => { |
| <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">TokenTree::Ident</span>(<span class="ident">ident</span>)) <span class="op">=</span> <span class="ident">iter</span>.<span class="ident">next</span>() { |
| <span class="ident">out</span>.<span class="ident">insert</span>(<span class="ident">syn::Lifetime</span> { |
| <span class="ident">apostrophe</span>: <span class="ident">op</span>.<span class="ident">span</span>(), |
| <span class="ident">ident</span>, |
| }); |
| } |
| } |
| <span class="ident">TokenTree::Group</span>(<span class="ident">group</span>) => { |
| <span class="kw">let</span> <span class="ident">tokens</span> <span class="op">=</span> <span class="ident">group</span>.<span class="ident">stream</span>(); |
| <span class="ident">collect_lifetimes_from_tokens</span>(<span class="ident">tokens</span>, <span class="ident">out</span>); |
| } |
| <span class="kw">_</span> => {} |
| } |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">parse_lit_str</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">syn::LitStr</span>) -> <span class="ident">parse::Result</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> |
| <span class="kw">where</span> |
| <span class="ident">T</span>: <span class="ident">Parse</span>, |
| { |
| <span class="kw">let</span> <span class="ident">tokens</span> <span class="op">=</span> <span class="ident">spanned_tokens</span>(<span class="ident">s</span>)<span class="question-mark">?</span>; |
| <span class="ident">syn::parse2</span>(<span class="ident">tokens</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">spanned_tokens</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">syn::LitStr</span>) -> <span class="ident">parse::Result</span><span class="op"><</span><span class="ident">TokenStream</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">stream</span> <span class="op">=</span> <span class="ident">syn::parse_str</span>(<span class="kw-2">&</span><span class="ident">s</span>.<span class="ident">value</span>())<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(<span class="ident">respan</span>(<span class="ident">stream</span>, <span class="ident">s</span>.<span class="ident">span</span>())) |
| } |
| </code></pre></div> |
| </section><section id="search" class="content hidden"></section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="serde_derive" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.60.0-nightly (1bd4fdc94 2022-01-12)" ></div> |
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