| use super::*; |
| |
| use crate::ast::{self, Name, PatKind}; |
| use crate::attr::first_attr_value_str_by_name; |
| use crate::parse::{ParseSess, PResult}; |
| use crate::parse::new_parser_from_source_str; |
| use crate::parse::token::Token; |
| use crate::print::pprust::item_to_string; |
| use crate::ptr::P; |
| use crate::source_map::FilePathMapping; |
| use crate::symbol::{kw, sym}; |
| use crate::tests::{matches_codepattern, string_to_stream, with_error_checking_parse}; |
| use crate::tokenstream::{DelimSpan, TokenTree, TokenStream}; |
| use crate::with_default_globals; |
| use syntax_pos::{Span, BytePos, Pos}; |
| |
| use std::path::PathBuf; |
| |
| /// Parses an item. |
| /// |
| /// Returns `Ok(Some(item))` when successful, `Ok(None)` when no item was found, and `Err` |
| /// when a syntax error occurred. |
| fn parse_item_from_source_str(name: FileName, source: String, sess: &ParseSess) |
| -> PResult<'_, Option<P<ast::Item>>> { |
| new_parser_from_source_str(sess, name, source).parse_item() |
| } |
| |
| // produce a syntax_pos::span |
| fn sp(a: u32, b: u32) -> Span { |
| Span::with_root_ctxt(BytePos(a), BytePos(b)) |
| } |
| |
| /// Parse a string, return an expr |
| fn string_to_expr(source_str : String) -> P<ast::Expr> { |
| let ps = ParseSess::new(FilePathMapping::empty()); |
| with_error_checking_parse(source_str, &ps, |p| { |
| p.parse_expr() |
| }) |
| } |
| |
| /// Parse a string, return an item |
| fn string_to_item(source_str : String) -> Option<P<ast::Item>> { |
| let ps = ParseSess::new(FilePathMapping::empty()); |
| with_error_checking_parse(source_str, &ps, |p| { |
| p.parse_item() |
| }) |
| } |
| |
| #[should_panic] |
| #[test] fn bad_path_expr_1() { |
| with_default_globals(|| { |
| string_to_expr("::abc::def::return".to_string()); |
| }) |
| } |
| |
| // check the token-tree-ization of macros |
| #[test] |
| fn string_to_tts_macro () { |
| with_default_globals(|| { |
| let tts: Vec<_> = |
| string_to_stream("macro_rules! zip (($a)=>($a))".to_string()).trees().collect(); |
| let tts: &[TokenTree] = &tts[..]; |
| |
| match tts { |
| [ |
| TokenTree::Token(Token { kind: token::Ident(name_macro_rules, false), .. }), |
| TokenTree::Token(Token { kind: token::Not, .. }), |
| TokenTree::Token(Token { kind: token::Ident(name_zip, false), .. }), |
| TokenTree::Delimited(_, macro_delim, macro_tts) |
| ] |
| if name_macro_rules == &sym::macro_rules && name_zip.as_str() == "zip" => { |
| let tts = ¯o_tts.trees().collect::<Vec<_>>(); |
| match &tts[..] { |
| [ |
| TokenTree::Delimited(_, first_delim, first_tts), |
| TokenTree::Token(Token { kind: token::FatArrow, .. }), |
| TokenTree::Delimited(_, second_delim, second_tts), |
| ] |
| if macro_delim == &token::Paren => { |
| let tts = &first_tts.trees().collect::<Vec<_>>(); |
| match &tts[..] { |
| [ |
| TokenTree::Token(Token { kind: token::Dollar, .. }), |
| TokenTree::Token(Token { kind: token::Ident(name, false), .. }), |
| ] |
| if first_delim == &token::Paren && name.as_str() == "a" => {}, |
| _ => panic!("value 3: {:?} {:?}", first_delim, first_tts), |
| } |
| let tts = &second_tts.trees().collect::<Vec<_>>(); |
| match &tts[..] { |
| [ |
| TokenTree::Token(Token { kind: token::Dollar, .. }), |
| TokenTree::Token(Token { kind: token::Ident(name, false), .. }), |
| ] |
| if second_delim == &token::Paren && name.as_str() == "a" => {}, |
| _ => panic!("value 4: {:?} {:?}", second_delim, second_tts), |
| } |
| }, |
| _ => panic!("value 2: {:?} {:?}", macro_delim, macro_tts), |
| } |
| }, |
| _ => panic!("value: {:?}",tts), |
| } |
| }) |
| } |
| |
| #[test] |
| fn string_to_tts_1() { |
| with_default_globals(|| { |
| let tts = string_to_stream("fn a (b : i32) { b; }".to_string()); |
| |
| let expected = TokenStream::new(vec![ |
| TokenTree::token(token::Ident(kw::Fn, false), sp(0, 2)).into(), |
| TokenTree::token(token::Ident(Name::intern("a"), false), sp(3, 4)).into(), |
| TokenTree::Delimited( |
| DelimSpan::from_pair(sp(5, 6), sp(13, 14)), |
| token::DelimToken::Paren, |
| TokenStream::new(vec![ |
| TokenTree::token(token::Ident(Name::intern("b"), false), sp(6, 7)).into(), |
| TokenTree::token(token::Colon, sp(8, 9)).into(), |
| TokenTree::token(token::Ident(sym::i32, false), sp(10, 13)).into(), |
| ]).into(), |
| ).into(), |
| TokenTree::Delimited( |
| DelimSpan::from_pair(sp(15, 16), sp(20, 21)), |
| token::DelimToken::Brace, |
| TokenStream::new(vec![ |
| TokenTree::token(token::Ident(Name::intern("b"), false), sp(17, 18)).into(), |
| TokenTree::token(token::Semi, sp(18, 19)).into(), |
| ]).into(), |
| ).into() |
| ]); |
| |
| assert_eq!(tts, expected); |
| }) |
| } |
| |
| #[test] fn parse_use() { |
| with_default_globals(|| { |
| let use_s = "use foo::bar::baz;"; |
| let vitem = string_to_item(use_s.to_string()).unwrap(); |
| let vitem_s = item_to_string(&vitem); |
| assert_eq!(&vitem_s[..], use_s); |
| |
| let use_s = "use foo::bar as baz;"; |
| let vitem = string_to_item(use_s.to_string()).unwrap(); |
| let vitem_s = item_to_string(&vitem); |
| assert_eq!(&vitem_s[..], use_s); |
| }) |
| } |
| |
| #[test] fn parse_extern_crate() { |
| with_default_globals(|| { |
| let ex_s = "extern crate foo;"; |
| let vitem = string_to_item(ex_s.to_string()).unwrap(); |
| let vitem_s = item_to_string(&vitem); |
| assert_eq!(&vitem_s[..], ex_s); |
| |
| let ex_s = "extern crate foo as bar;"; |
| let vitem = string_to_item(ex_s.to_string()).unwrap(); |
| let vitem_s = item_to_string(&vitem); |
| assert_eq!(&vitem_s[..], ex_s); |
| }) |
| } |
| |
| fn get_spans_of_pat_idents(src: &str) -> Vec<Span> { |
| let item = string_to_item(src.to_string()).unwrap(); |
| |
| struct PatIdentVisitor { |
| spans: Vec<Span> |
| } |
| impl<'a> crate::visit::Visitor<'a> for PatIdentVisitor { |
| fn visit_pat(&mut self, p: &'a ast::Pat) { |
| match p.node { |
| PatKind::Ident(_ , ref ident, _) => { |
| self.spans.push(ident.span.clone()); |
| } |
| _ => { |
| crate::visit::walk_pat(self, p); |
| } |
| } |
| } |
| } |
| let mut v = PatIdentVisitor { spans: Vec::new() }; |
| crate::visit::walk_item(&mut v, &item); |
| return v.spans; |
| } |
| |
| #[test] fn span_of_self_arg_pat_idents_are_correct() { |
| with_default_globals(|| { |
| |
| let srcs = ["impl z { fn a (&self, &myarg: i32) {} }", |
| "impl z { fn a (&mut self, &myarg: i32) {} }", |
| "impl z { fn a (&'a self, &myarg: i32) {} }", |
| "impl z { fn a (self, &myarg: i32) {} }", |
| "impl z { fn a (self: Foo, &myarg: i32) {} }", |
| ]; |
| |
| for &src in &srcs { |
| let spans = get_spans_of_pat_idents(src); |
| let (lo, hi) = (spans[0].lo(), spans[0].hi()); |
| assert!("self" == &src[lo.to_usize()..hi.to_usize()], |
| "\"{}\" != \"self\". src=\"{}\"", |
| &src[lo.to_usize()..hi.to_usize()], src) |
| } |
| }) |
| } |
| |
| #[test] fn parse_exprs () { |
| with_default_globals(|| { |
| // just make sure that they parse.... |
| string_to_expr("3 + 4".to_string()); |
| string_to_expr("a::z.froob(b,&(987+3))".to_string()); |
| }) |
| } |
| |
| #[test] fn attrs_fix_bug () { |
| with_default_globals(|| { |
| string_to_item("pub fn mk_file_writer(path: &Path, flags: &[FileFlag]) |
| -> Result<Box<Writer>, String> { |
| #[cfg(windows)] |
| fn wb() -> c_int { |
| (O_WRONLY | libc::consts::os::extra::O_BINARY) as c_int |
| } |
| |
| #[cfg(unix)] |
| fn wb() -> c_int { O_WRONLY as c_int } |
| |
| let mut fflags: c_int = wb(); |
| }".to_string()); |
| }) |
| } |
| |
| #[test] fn crlf_doc_comments() { |
| with_default_globals(|| { |
| let sess = ParseSess::new(FilePathMapping::empty()); |
| |
| let name_1 = FileName::Custom("crlf_source_1".to_string()); |
| let source = "/// doc comment\r\nfn foo() {}".to_string(); |
| let item = parse_item_from_source_str(name_1, source, &sess) |
| .unwrap().unwrap(); |
| let doc = first_attr_value_str_by_name(&item.attrs, sym::doc).unwrap(); |
| assert_eq!(doc.as_str(), "/// doc comment"); |
| |
| let name_2 = FileName::Custom("crlf_source_2".to_string()); |
| let source = "/// doc comment\r\n/// line 2\r\nfn foo() {}".to_string(); |
| let item = parse_item_from_source_str(name_2, source, &sess) |
| .unwrap().unwrap(); |
| let docs = item.attrs.iter().filter(|a| a.path == sym::doc) |
| .map(|a| a.value_str().unwrap().to_string()).collect::<Vec<_>>(); |
| let b: &[_] = &["/// doc comment".to_string(), "/// line 2".to_string()]; |
| assert_eq!(&docs[..], b); |
| |
| let name_3 = FileName::Custom("clrf_source_3".to_string()); |
| let source = "/** doc comment\r\n * with CRLF */\r\nfn foo() {}".to_string(); |
| let item = parse_item_from_source_str(name_3, source, &sess).unwrap().unwrap(); |
| let doc = first_attr_value_str_by_name(&item.attrs, sym::doc).unwrap(); |
| assert_eq!(doc.as_str(), "/** doc comment\n * with CRLF */"); |
| }); |
| } |
| |
| #[test] |
| fn ttdelim_span() { |
| fn parse_expr_from_source_str( |
| name: FileName, source: String, sess: &ParseSess |
| ) -> PResult<'_, P<ast::Expr>> { |
| new_parser_from_source_str(sess, name, source).parse_expr() |
| } |
| |
| with_default_globals(|| { |
| let sess = ParseSess::new(FilePathMapping::empty()); |
| let expr = parse_expr_from_source_str(PathBuf::from("foo").into(), |
| "foo!( fn main() { body } )".to_string(), &sess).unwrap(); |
| |
| let tts: Vec<_> = match expr.node { |
| ast::ExprKind::Mac(ref mac) => mac.stream().trees().collect(), |
| _ => panic!("not a macro"), |
| }; |
| |
| let span = tts.iter().rev().next().unwrap().span(); |
| |
| match sess.source_map().span_to_snippet(span) { |
| Ok(s) => assert_eq!(&s[..], "{ body }"), |
| Err(_) => panic!("could not get snippet"), |
| } |
| }); |
| } |
| |
| // This tests that when parsing a string (rather than a file) we don't try |
| // and read in a file for a module declaration and just parse a stub. |
| // See `recurse_into_file_modules` in the parser. |
| #[test] |
| fn out_of_line_mod() { |
| with_default_globals(|| { |
| let sess = ParseSess::new(FilePathMapping::empty()); |
| let item = parse_item_from_source_str( |
| PathBuf::from("foo").into(), |
| "mod foo { struct S; mod this_does_not_exist; }".to_owned(), |
| &sess, |
| ).unwrap().unwrap(); |
| |
| if let ast::ItemKind::Mod(ref m) = item.node { |
| assert!(m.items.len() == 2); |
| } else { |
| panic!(); |
| } |
| }); |
| } |
| |
| #[test] |
| fn eqmodws() { |
| assert_eq!(matches_codepattern("",""),true); |
| assert_eq!(matches_codepattern("","a"),false); |
| assert_eq!(matches_codepattern("a",""),false); |
| assert_eq!(matches_codepattern("a","a"),true); |
| assert_eq!(matches_codepattern("a b","a \n\t\r b"),true); |
| assert_eq!(matches_codepattern("a b ","a \n\t\r b"),true); |
| assert_eq!(matches_codepattern("a b","a \n\t\r b "),false); |
| assert_eq!(matches_codepattern("a b","a b"),true); |
| assert_eq!(matches_codepattern("ab","a b"),false); |
| assert_eq!(matches_codepattern("a b","ab"),true); |
| assert_eq!(matches_codepattern(" a b","ab"),true); |
| } |
| |
| #[test] |
| fn pattern_whitespace() { |
| assert_eq!(matches_codepattern("","\x0C"), false); |
| assert_eq!(matches_codepattern("a b ","a \u{0085}\n\t\r b"),true); |
| assert_eq!(matches_codepattern("a b","a \u{0085}\n\t\r b "),false); |
| } |
| |
| #[test] |
| fn non_pattern_whitespace() { |
| // These have the property 'White_Space' but not 'Pattern_White_Space' |
| assert_eq!(matches_codepattern("a b","a\u{2002}b"), false); |
| assert_eq!(matches_codepattern("a b","a\u{2002}b"), false); |
| assert_eq!(matches_codepattern("\u{205F}a b","ab"), false); |
| assert_eq!(matches_codepattern("a \u{3000}b","ab"), false); |
| } |
