| // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| //! Write the output of rustc's analysis to an implementor of Dump. The data is |
| //! primarily designed to be used as input to the DXR tool, specifically its |
| //! Rust plugin. It could also be used by IDEs or other code browsing, search, or |
| //! cross-referencing tools. |
| //! |
| //! Dumping the analysis is implemented by walking the AST and getting a bunch of |
| //! info out from all over the place. We use Def IDs to identify objects. The |
| //! tricky part is getting syntactic (span, source text) and semantic (reference |
| //! Def IDs) information for parts of expressions which the compiler has discarded. |
| //! E.g., in a path `foo::bar::baz`, the compiler only keeps a span for the whole |
| //! path and a reference to `baz`, but we want spans and references for all three |
| //! idents. |
| //! |
| //! SpanUtils is used to manipulate spans. In particular, to extract sub-spans |
| //! from spans (e.g., the span for `bar` from the above example path). |
| //! DumpVisitor walks the AST and processes it, and an implementor of Dump |
| //! is used for recording the output in a format-agnostic way (see CsvDumper |
| //! for an example). |
| |
| use rustc::hir::def::Def; |
| use rustc::hir::def_id::DefId; |
| use rustc::hir::map::Node; |
| use rustc::session::Session; |
| use rustc::ty::{self, TyCtxt, ImplOrTraitItem, ImplOrTraitItemContainer}; |
| |
| use std::collections::HashSet; |
| use std::hash::*; |
| |
| use syntax::ast::{self, NodeId, PatKind}; |
| use syntax::parse::token::{self, keywords}; |
| use syntax::visit::{self, Visitor}; |
| use syntax::print::pprust::{path_to_string, ty_to_string, bounds_to_string, generics_to_string}; |
| use syntax::ptr::P; |
| use syntax::codemap::Spanned; |
| use syntax_pos::*; |
| |
| use super::{escape, generated_code, SaveContext, PathCollector}; |
| use super::data::*; |
| use super::dump::Dump; |
| use super::external_data::Lower; |
| use super::span_utils::SpanUtils; |
| use super::recorder; |
| |
| macro_rules! down_cast_data { |
| ($id:ident, $kind:ident, $sp:expr) => { |
| let $id = if let super::Data::$kind(data) = $id { |
| data |
| } else { |
| span_bug!($sp, "unexpected data kind: {:?}", $id); |
| }; |
| }; |
| } |
| |
| pub struct DumpVisitor<'l, 'tcx: 'l, 'll, D: 'll> { |
| save_ctxt: SaveContext<'l, 'tcx>, |
| sess: &'l Session, |
| tcx: TyCtxt<'l, 'tcx, 'tcx>, |
| analysis: &'l ty::CrateAnalysis<'l>, |
| dumper: &'ll mut D, |
| |
| span: SpanUtils<'l>, |
| |
| cur_scope: NodeId, |
| |
| // Set of macro definition (callee) spans, and the set |
| // of macro use (callsite) spans. We store these to ensure |
| // we only write one macro def per unique macro definition, and |
| // one macro use per unique callsite span. |
| mac_defs: HashSet<Span>, |
| mac_uses: HashSet<Span>, |
| } |
| |
| impl<'l, 'tcx: 'l, 'll, D: Dump + 'll> DumpVisitor<'l, 'tcx, 'll, D> { |
| pub fn new(tcx: TyCtxt<'l, 'tcx, 'tcx>, |
| save_ctxt: SaveContext<'l, 'tcx>, |
| analysis: &'l ty::CrateAnalysis<'l>, |
| dumper: &'ll mut D) |
| -> DumpVisitor<'l, 'tcx, 'll, D> { |
| let span_utils = SpanUtils::new(&tcx.sess); |
| DumpVisitor { |
| sess: &tcx.sess, |
| tcx: tcx, |
| save_ctxt: save_ctxt, |
| analysis: analysis, |
| dumper: dumper, |
| span: span_utils.clone(), |
| cur_scope: 0, |
| mac_defs: HashSet::new(), |
| mac_uses: HashSet::new(), |
| } |
| } |
| |
| fn nest<F>(&mut self, scope_id: NodeId, f: F) |
| where F: FnOnce(&mut DumpVisitor<'l, 'tcx, 'll, D>) |
| { |
| let parent_scope = self.cur_scope; |
| self.cur_scope = scope_id; |
| f(self); |
| self.cur_scope = parent_scope; |
| } |
| |
| pub fn dump_crate_info(&mut self, name: &str, krate: &ast::Crate) { |
| let source_file = self.tcx.sess.local_crate_source_file.as_ref(); |
| let crate_root = source_file.map(|source_file| { |
| match source_file.file_name() { |
| Some(_) => source_file.parent().unwrap().display().to_string(), |
| None => source_file.display().to_string(), |
| } |
| }); |
| |
| // Info about all the external crates referenced from this crate. |
| let external_crates = self.save_ctxt.get_external_crates().into_iter().map(|c| { |
| let lo_loc = self.span.sess.codemap().lookup_char_pos(c.span.lo); |
| ExternalCrateData { |
| name: c.name, |
| num: c.number, |
| file_name: SpanUtils::make_path_string(&lo_loc.file.name), |
| } |
| }).collect(); |
| |
| // The current crate. |
| let data = CratePreludeData { |
| crate_name: name.into(), |
| crate_root: crate_root.unwrap_or("<no source>".to_owned()), |
| external_crates: external_crates, |
| span: krate.span, |
| }; |
| |
| self.dumper.crate_prelude(data.lower(self.tcx)); |
| } |
| |
| // Return all non-empty prefixes of a path. |
| // For each prefix, we return the span for the last segment in the prefix and |
| // a str representation of the entire prefix. |
| fn process_path_prefixes(&self, path: &ast::Path) -> Vec<(Span, String)> { |
| let spans = self.span.spans_for_path_segments(path); |
| |
| // Paths to enums seem to not match their spans - the span includes all the |
| // variants too. But they seem to always be at the end, so I hope we can cope with |
| // always using the first ones. So, only error out if we don't have enough spans. |
| // What could go wrong...? |
| if spans.len() < path.segments.len() { |
| if generated_code(path.span) { |
| return vec!(); |
| } |
| error!("Mis-calculated spans for path '{}'. Found {} spans, expected {}. Found spans:", |
| path_to_string(path), |
| spans.len(), |
| path.segments.len()); |
| for s in &spans { |
| let loc = self.sess.codemap().lookup_char_pos(s.lo); |
| error!(" '{}' in {}, line {}", |
| self.span.snippet(*s), |
| loc.file.name, |
| loc.line); |
| } |
| return vec!(); |
| } |
| |
| let mut result: Vec<(Span, String)> = vec!(); |
| |
| let mut segs = vec!(); |
| for (i, (seg, span)) in path.segments.iter().zip(&spans).enumerate() { |
| segs.push(seg.clone()); |
| let sub_path = ast::Path { |
| span: *span, // span for the last segment |
| global: path.global, |
| segments: segs, |
| }; |
| let qualname = if i == 0 && path.global { |
| format!("::{}", path_to_string(&sub_path)) |
| } else { |
| path_to_string(&sub_path) |
| }; |
| result.push((*span, qualname)); |
| segs = sub_path.segments; |
| } |
| |
| result |
| } |
| |
| // The global arg allows us to override the global-ness of the path (which |
| // actually means 'does the path start with `::`', rather than 'is the path |
| // semantically global). We use the override for `use` imports (etc.) where |
| // the syntax is non-global, but the semantics are global. |
| fn write_sub_paths(&mut self, path: &ast::Path, global: bool) { |
| let sub_paths = self.process_path_prefixes(path); |
| for (i, &(ref span, ref qualname)) in sub_paths.iter().enumerate() { |
| let qualname = if i == 0 && global && !path.global { |
| format!("::{}", qualname) |
| } else { |
| qualname.clone() |
| }; |
| self.dumper.mod_ref(ModRefData { |
| span: *span, |
| qualname: qualname, |
| scope: self.cur_scope, |
| ref_id: None |
| }.lower(self.tcx)); |
| } |
| } |
| |
| // As write_sub_paths, but does not process the last ident in the path (assuming it |
| // will be processed elsewhere). See note on write_sub_paths about global. |
| fn write_sub_paths_truncated(&mut self, path: &ast::Path, global: bool) { |
| let sub_paths = self.process_path_prefixes(path); |
| let len = sub_paths.len(); |
| if len <= 1 { |
| return; |
| } |
| |
| let sub_paths = &sub_paths[..len-1]; |
| for (i, &(ref span, ref qualname)) in sub_paths.iter().enumerate() { |
| let qualname = if i == 0 && global && !path.global { |
| format!("::{}", qualname) |
| } else { |
| qualname.clone() |
| }; |
| self.dumper.mod_ref(ModRefData { |
| span: *span, |
| qualname: qualname, |
| scope: self.cur_scope, |
| ref_id: None |
| }.lower(self.tcx)); |
| } |
| } |
| |
| // As write_sub_paths, but expects a path of the form module_path::trait::method |
| // Where trait could actually be a struct too. |
| fn write_sub_path_trait_truncated(&mut self, path: &ast::Path) { |
| let sub_paths = self.process_path_prefixes(path); |
| let len = sub_paths.len(); |
| if len <= 1 { |
| return; |
| } |
| let sub_paths = &sub_paths[.. (len-1)]; |
| |
| // write the trait part of the sub-path |
| let (ref span, ref qualname) = sub_paths[len-2]; |
| self.dumper.type_ref(TypeRefData { |
| ref_id: None, |
| span: *span, |
| qualname: qualname.to_owned(), |
| scope: 0 |
| }.lower(self.tcx)); |
| |
| // write the other sub-paths |
| if len <= 2 { |
| return; |
| } |
| let sub_paths = &sub_paths[..len-2]; |
| for &(ref span, ref qualname) in sub_paths { |
| self.dumper.mod_ref(ModRefData { |
| span: *span, |
| qualname: qualname.to_owned(), |
| scope: self.cur_scope, |
| ref_id: None |
| }.lower(self.tcx)); |
| } |
| } |
| |
| // looks up anything, not just a type |
| fn lookup_type_ref(&self, ref_id: NodeId) -> Option<DefId> { |
| match self.tcx.expect_def(ref_id) { |
| Def::PrimTy(..) => None, |
| Def::SelfTy(..) => None, |
| def => Some(def.def_id()), |
| } |
| } |
| |
| fn process_def_kind(&mut self, |
| ref_id: NodeId, |
| span: Span, |
| sub_span: Option<Span>, |
| def_id: DefId, |
| scope: NodeId) { |
| if self.span.filter_generated(sub_span, span) { |
| return; |
| } |
| |
| let def = self.tcx.expect_def(ref_id); |
| match def { |
| Def::Mod(_) | |
| Def::ForeignMod(_) => { |
| self.dumper.mod_ref(ModRefData { |
| span: sub_span.expect("No span found for mod ref"), |
| ref_id: Some(def_id), |
| scope: scope, |
| qualname: String::new() |
| }.lower(self.tcx)); |
| } |
| Def::Struct(..) | |
| Def::Enum(..) | |
| Def::TyAlias(..) | |
| Def::AssociatedTy(..) | |
| Def::Trait(_) => { |
| self.dumper.type_ref(TypeRefData { |
| span: sub_span.expect("No span found for type ref"), |
| ref_id: Some(def_id), |
| scope: scope, |
| qualname: String::new() |
| }.lower(self.tcx)); |
| } |
| Def::Static(_, _) | |
| Def::Const(_) | |
| Def::AssociatedConst(..) | |
| Def::Local(..) | |
| Def::Variant(..) | |
| Def::Upvar(..) => { |
| self.dumper.variable_ref(VariableRefData { |
| span: sub_span.expect("No span found for var ref"), |
| ref_id: def_id, |
| scope: scope, |
| name: String::new() |
| }.lower(self.tcx)); |
| } |
| Def::Fn(..) => { |
| self.dumper.function_ref(FunctionRefData { |
| span: sub_span.expect("No span found for fn ref"), |
| ref_id: def_id, |
| scope: scope |
| }.lower(self.tcx)); |
| } |
| Def::SelfTy(..) | |
| Def::Label(_) | |
| Def::TyParam(..) | |
| Def::Method(..) | |
| Def::PrimTy(_) | |
| Def::Err => { |
| span_bug!(span, |
| "process_def_kind for unexpected item: {:?}", |
| def); |
| } |
| } |
| } |
| |
| fn process_formals(&mut self, formals: &Vec<ast::Arg>, qualname: &str) { |
| for arg in formals { |
| self.visit_pat(&arg.pat); |
| let mut collector = PathCollector::new(); |
| collector.visit_pat(&arg.pat); |
| let span_utils = self.span.clone(); |
| for &(id, ref p, _, _) in &collector.collected_paths { |
| let typ = self.tcx.node_types().get(&id).unwrap().to_string(); |
| // get the span only for the name of the variable (I hope the path is only ever a |
| // variable name, but who knows?) |
| let sub_span = span_utils.span_for_last_ident(p.span); |
| if !self.span.filter_generated(sub_span, p.span) { |
| self.dumper.variable(VariableData { |
| id: id, |
| kind: VariableKind::Local, |
| span: sub_span.expect("No span found for variable"), |
| name: path_to_string(p), |
| qualname: format!("{}::{}", qualname, path_to_string(p)), |
| type_value: typ, |
| value: String::new(), |
| scope: 0 |
| }.lower(self.tcx)); |
| } |
| } |
| } |
| } |
| |
| fn process_method(&mut self, |
| sig: &ast::MethodSig, |
| body: Option<&ast::Block>, |
| id: ast::NodeId, |
| name: ast::Name, |
| span: Span) { |
| debug!("process_method: {}:{}", id, name); |
| |
| if let Some(method_data) = self.save_ctxt.get_method_data(id, name, span) { |
| |
| let sig_str = ::make_signature(&sig.decl, &sig.generics); |
| if body.is_some() { |
| self.process_formals(&sig.decl.inputs, &method_data.qualname); |
| } |
| |
| // If the method is defined in an impl, then try and find the corresponding |
| // method decl in a trait, and if there is one, make a decl_id for it. This |
| // requires looking up the impl, then the trait, then searching for a method |
| // with the right name. |
| if !self.span.filter_generated(Some(method_data.span), span) { |
| let container = |
| self.tcx.impl_or_trait_item(self.tcx.map.local_def_id(id)).container(); |
| let decl_id = if let ImplOrTraitItemContainer::ImplContainer(id) = container { |
| self.tcx.trait_id_of_impl(id).and_then(|id| { |
| for item in &**self.tcx.trait_items(id) { |
| if let &ImplOrTraitItem::MethodTraitItem(ref m) = item { |
| if m.name == name { |
| return Some(m.def_id); |
| } |
| } |
| } |
| None |
| }) |
| } else { |
| None |
| }; |
| |
| self.dumper.method(MethodData { |
| id: method_data.id, |
| name: method_data.name, |
| span: method_data.span, |
| scope: method_data.scope, |
| qualname: method_data.qualname.clone(), |
| value: sig_str, |
| decl_id: decl_id, |
| }.lower(self.tcx)); |
| } |
| |
| self.process_generic_params(&sig.generics, span, &method_data.qualname, id); |
| } |
| |
| // walk arg and return types |
| for arg in &sig.decl.inputs { |
| self.visit_ty(&arg.ty); |
| } |
| |
| if let ast::FunctionRetTy::Ty(ref ret_ty) = sig.decl.output { |
| self.visit_ty(ret_ty); |
| } |
| |
| // walk the fn body |
| if let Some(body) = body { |
| self.nest(id, |v| v.visit_block(body)); |
| } |
| } |
| |
| fn process_trait_ref(&mut self, trait_ref: &ast::TraitRef) { |
| let trait_ref_data = self.save_ctxt.get_trait_ref_data(trait_ref, self.cur_scope); |
| if let Some(trait_ref_data) = trait_ref_data { |
| if !self.span.filter_generated(Some(trait_ref_data.span), trait_ref.path.span) { |
| self.dumper.type_ref(trait_ref_data.lower(self.tcx)); |
| } |
| |
| visit::walk_path(self, &trait_ref.path); |
| } |
| } |
| |
| fn process_struct_field_def(&mut self, field: &ast::StructField, parent_id: NodeId) { |
| let field_data = self.save_ctxt.get_field_data(field, parent_id); |
| if let Some(mut field_data) = field_data { |
| if !self.span.filter_generated(Some(field_data.span), field.span) { |
| field_data.value = String::new(); |
| self.dumper.variable(field_data.lower(self.tcx)); |
| } |
| } |
| } |
| |
| // Dump generic params bindings, then visit_generics |
| fn process_generic_params(&mut self, |
| generics: &ast::Generics, |
| full_span: Span, |
| prefix: &str, |
| id: NodeId) { |
| // We can't only use visit_generics since we don't have spans for param |
| // bindings, so we reparse the full_span to get those sub spans. |
| // However full span is the entire enum/fn/struct block, so we only want |
| // the first few to match the number of generics we're looking for. |
| let param_sub_spans = self.span.spans_for_ty_params(full_span, |
| (generics.ty_params.len() as isize)); |
| for (param, param_ss) in generics.ty_params.iter().zip(param_sub_spans) { |
| let name = escape(self.span.snippet(param_ss)); |
| // Append $id to name to make sure each one is unique |
| let qualname = format!("{}::{}${}", |
| prefix, |
| name, |
| id); |
| if !self.span.filter_generated(Some(param_ss), full_span) { |
| self.dumper.typedef(TypeDefData { |
| span: param_ss, |
| name: name, |
| id: param.id, |
| qualname: qualname, |
| value: String::new() |
| }.lower(self.tcx)); |
| } |
| } |
| self.visit_generics(generics); |
| } |
| |
| fn process_fn(&mut self, |
| item: &ast::Item, |
| decl: &ast::FnDecl, |
| ty_params: &ast::Generics, |
| body: &ast::Block) { |
| if let Some(fn_data) = self.save_ctxt.get_item_data(item) { |
| down_cast_data!(fn_data, FunctionData, item.span); |
| if !self.span.filter_generated(Some(fn_data.span), item.span) { |
| self.dumper.function(fn_data.clone().lower(self.tcx)); |
| } |
| |
| self.process_formals(&decl.inputs, &fn_data.qualname); |
| self.process_generic_params(ty_params, item.span, &fn_data.qualname, item.id); |
| } |
| |
| for arg in &decl.inputs { |
| self.visit_ty(&arg.ty); |
| } |
| |
| if let ast::FunctionRetTy::Ty(ref ret_ty) = decl.output { |
| self.visit_ty(&ret_ty); |
| } |
| |
| self.nest(item.id, |v| v.visit_block(&body)); |
| } |
| |
| fn process_static_or_const_item(&mut self, item: &ast::Item, typ: &ast::Ty, expr: &ast::Expr) { |
| if let Some(var_data) = self.save_ctxt.get_item_data(item) { |
| down_cast_data!(var_data, VariableData, item.span); |
| if !self.span.filter_generated(Some(var_data.span), item.span) { |
| self.dumper.variable(var_data.lower(self.tcx)); |
| } |
| } |
| self.visit_ty(&typ); |
| self.visit_expr(expr); |
| } |
| |
| fn process_const(&mut self, |
| id: ast::NodeId, |
| name: ast::Name, |
| span: Span, |
| typ: &ast::Ty, |
| expr: &ast::Expr) { |
| let qualname = format!("::{}", self.tcx.node_path_str(id)); |
| |
| let sub_span = self.span.sub_span_after_keyword(span, keywords::Const); |
| |
| if !self.span.filter_generated(sub_span, span) { |
| self.dumper.variable(VariableData { |
| span: sub_span.expect("No span found for variable"), |
| kind: VariableKind::Const, |
| id: id, |
| name: name.to_string(), |
| qualname: qualname, |
| value: self.span.snippet(expr.span), |
| type_value: ty_to_string(&typ), |
| scope: self.cur_scope |
| }.lower(self.tcx)); |
| } |
| |
| // walk type and init value |
| self.visit_ty(typ); |
| self.visit_expr(expr); |
| } |
| |
| // FIXME tuple structs should generate tuple-specific data. |
| fn process_struct(&mut self, |
| item: &ast::Item, |
| def: &ast::VariantData, |
| ty_params: &ast::Generics) { |
| let name = item.ident.to_string(); |
| let qualname = format!("::{}", self.tcx.node_path_str(item.id)); |
| |
| let sub_span = self.span.sub_span_after_keyword(item.span, keywords::Struct); |
| let (val, fields) = |
| if let ast::ItemKind::Struct(ast::VariantData::Struct(ref fields, _), _) = item.node |
| { |
| let fields_str = fields.iter() |
| .enumerate() |
| .map(|(i, f)| f.ident.map(|i| i.to_string()) |
| .unwrap_or(i.to_string())) |
| .collect::<Vec<_>>() |
| .join(", "); |
| (format!("{} {{ {} }}", name, fields_str), fields.iter().map(|f| f.id).collect()) |
| } else { |
| (String::new(), vec![]) |
| }; |
| |
| if !self.span.filter_generated(sub_span, item.span) { |
| self.dumper.struct_data(StructData { |
| span: sub_span.expect("No span found for struct"), |
| id: item.id, |
| name: name, |
| ctor_id: def.id(), |
| qualname: qualname.clone(), |
| scope: self.cur_scope, |
| value: val, |
| fields: fields, |
| }.lower(self.tcx)); |
| } |
| |
| |
| // fields |
| for field in def.fields() { |
| self.process_struct_field_def(field, item.id); |
| self.visit_ty(&field.ty); |
| } |
| |
| self.process_generic_params(ty_params, item.span, &qualname, item.id); |
| } |
| |
| fn process_enum(&mut self, |
| item: &ast::Item, |
| enum_definition: &ast::EnumDef, |
| ty_params: &ast::Generics) { |
| let enum_data = self.save_ctxt.get_item_data(item); |
| let enum_data = match enum_data { |
| None => return, |
| Some(data) => data, |
| }; |
| down_cast_data!(enum_data, EnumData, item.span); |
| if !self.span.filter_generated(Some(enum_data.span), item.span) { |
| self.dumper.enum_data(enum_data.clone().lower(self.tcx)); |
| } |
| |
| for variant in &enum_definition.variants { |
| let name = variant.node.name.name.to_string(); |
| let mut qualname = enum_data.qualname.clone(); |
| qualname.push_str("::"); |
| qualname.push_str(&name); |
| |
| match variant.node.data { |
| ast::VariantData::Struct(ref fields, _) => { |
| let sub_span = self.span.span_for_first_ident(variant.span); |
| let fields_str = fields.iter() |
| .enumerate() |
| .map(|(i, f)| f.ident.map(|i| i.to_string()) |
| .unwrap_or(i.to_string())) |
| .collect::<Vec<_>>() |
| .join(", "); |
| let val = format!("{}::{} {{ {} }}", enum_data.name, name, fields_str); |
| if !self.span.filter_generated(sub_span, variant.span) { |
| self.dumper.struct_variant(StructVariantData { |
| span: sub_span.expect("No span found for struct variant"), |
| id: variant.node.data.id(), |
| name: name, |
| qualname: qualname, |
| type_value: enum_data.qualname.clone(), |
| value: val, |
| scope: enum_data.scope |
| }.lower(self.tcx)); |
| } |
| } |
| ref v => { |
| let sub_span = self.span.span_for_first_ident(variant.span); |
| let mut val = format!("{}::{}", enum_data.name, name); |
| if let &ast::VariantData::Tuple(ref fields, _) = v { |
| val.push('('); |
| val.push_str(&fields.iter() |
| .map(|f| ty_to_string(&f.ty)) |
| .collect::<Vec<_>>() |
| .join(", ")); |
| val.push(')'); |
| } |
| if !self.span.filter_generated(sub_span, variant.span) { |
| self.dumper.tuple_variant(TupleVariantData { |
| span: sub_span.expect("No span found for tuple variant"), |
| id: variant.node.data.id(), |
| name: name, |
| qualname: qualname, |
| type_value: enum_data.qualname.clone(), |
| value: val, |
| scope: enum_data.scope |
| }.lower(self.tcx)); |
| } |
| } |
| } |
| |
| |
| for field in variant.node.data.fields() { |
| self.process_struct_field_def(field, variant.node.data.id()); |
| self.visit_ty(&field.ty); |
| } |
| } |
| self.process_generic_params(ty_params, item.span, &enum_data.qualname, enum_data.id); |
| } |
| |
| fn process_impl(&mut self, |
| item: &ast::Item, |
| type_parameters: &ast::Generics, |
| trait_ref: &Option<ast::TraitRef>, |
| typ: &ast::Ty, |
| impl_items: &[ast::ImplItem]) { |
| let mut has_self_ref = false; |
| if let Some(impl_data) = self.save_ctxt.get_item_data(item) { |
| down_cast_data!(impl_data, ImplData, item.span); |
| if let Some(ref self_ref) = impl_data.self_ref { |
| has_self_ref = true; |
| if !self.span.filter_generated(Some(self_ref.span), item.span) { |
| self.dumper.type_ref(self_ref.clone().lower(self.tcx)); |
| } |
| } |
| if let Some(ref trait_ref_data) = impl_data.trait_ref { |
| if !self.span.filter_generated(Some(trait_ref_data.span), item.span) { |
| self.dumper.type_ref(trait_ref_data.clone().lower(self.tcx)); |
| } |
| |
| visit::walk_path(self, &trait_ref.as_ref().unwrap().path); |
| } |
| |
| if !self.span.filter_generated(Some(impl_data.span), item.span) { |
| self.dumper.impl_data(ImplData { |
| id: impl_data.id, |
| span: impl_data.span, |
| scope: impl_data.scope, |
| trait_ref: impl_data.trait_ref.map(|d| d.ref_id.unwrap()), |
| self_ref: impl_data.self_ref.map(|d| d.ref_id.unwrap()) |
| }.lower(self.tcx)); |
| } |
| } |
| if !has_self_ref { |
| self.visit_ty(&typ); |
| } |
| self.process_generic_params(type_parameters, item.span, "", item.id); |
| for impl_item in impl_items { |
| self.visit_impl_item(impl_item); |
| } |
| } |
| |
| fn process_trait(&mut self, |
| item: &ast::Item, |
| generics: &ast::Generics, |
| trait_refs: &ast::TyParamBounds, |
| methods: &[ast::TraitItem]) { |
| let name = item.ident.to_string(); |
| let qualname = format!("::{}", self.tcx.node_path_str(item.id)); |
| let mut val = name.clone(); |
| if !generics.lifetimes.is_empty() || !generics.ty_params.is_empty() { |
| val.push_str(&generics_to_string(generics)); |
| } |
| if !trait_refs.is_empty() { |
| val.push_str(": "); |
| val.push_str(&bounds_to_string(trait_refs)); |
| } |
| let sub_span = self.span.sub_span_after_keyword(item.span, keywords::Trait); |
| if !self.span.filter_generated(sub_span, item.span) { |
| self.dumper.trait_data(TraitData { |
| span: sub_span.expect("No span found for trait"), |
| id: item.id, |
| name: name, |
| qualname: qualname.clone(), |
| scope: self.cur_scope, |
| value: val, |
| items: methods.iter().map(|i| i.id).collect(), |
| }.lower(self.tcx)); |
| } |
| |
| // super-traits |
| for super_bound in trait_refs.iter() { |
| let trait_ref = match *super_bound { |
| ast::TraitTyParamBound(ref trait_ref, _) => { |
| trait_ref |
| } |
| ast::RegionTyParamBound(..) => { |
| continue; |
| } |
| }; |
| |
| let trait_ref = &trait_ref.trait_ref; |
| if let Some(id) = self.lookup_type_ref(trait_ref.ref_id) { |
| let sub_span = self.span.sub_span_for_type_name(trait_ref.path.span); |
| if !self.span.filter_generated(sub_span, trait_ref.path.span) { |
| self.dumper.type_ref(TypeRefData { |
| span: sub_span.expect("No span found for trait ref"), |
| ref_id: Some(id), |
| scope: self.cur_scope, |
| qualname: String::new() |
| }.lower(self.tcx)); |
| } |
| |
| if !self.span.filter_generated(sub_span, trait_ref.path.span) { |
| let sub_span = sub_span.expect("No span for inheritance"); |
| self.dumper.inheritance(InheritanceData { |
| span: sub_span, |
| base_id: id, |
| deriv_id: item.id |
| }.lower(self.tcx)); |
| } |
| } |
| } |
| |
| // walk generics and methods |
| self.process_generic_params(generics, item.span, &qualname, item.id); |
| for method in methods { |
| self.visit_trait_item(method) |
| } |
| } |
| |
| // `item` is the module in question, represented as an item. |
| fn process_mod(&mut self, item: &ast::Item) { |
| if let Some(mod_data) = self.save_ctxt.get_item_data(item) { |
| down_cast_data!(mod_data, ModData, item.span); |
| if !self.span.filter_generated(Some(mod_data.span), item.span) { |
| self.dumper.mod_data(mod_data.lower(self.tcx)); |
| } |
| } |
| } |
| |
| fn process_path(&mut self, id: NodeId, path: &ast::Path, ref_kind: Option<recorder::Row>) { |
| let path_data = self.save_ctxt.get_path_data(id, path); |
| if generated_code(path.span) && path_data.is_none() { |
| return; |
| } |
| |
| let path_data = match path_data { |
| Some(pd) => pd, |
| None => { |
| span_bug!(path.span, |
| "Unexpected def kind while looking up path in `{}`", |
| self.span.snippet(path.span)) |
| } |
| }; |
| |
| match path_data { |
| Data::VariableRefData(vrd) => { |
| // FIXME: this whole block duplicates the code in process_def_kind |
| if !self.span.filter_generated(Some(vrd.span), path.span) { |
| match ref_kind { |
| Some(recorder::TypeRef) => { |
| self.dumper.type_ref(TypeRefData { |
| span: vrd.span, |
| ref_id: Some(vrd.ref_id), |
| scope: vrd.scope, |
| qualname: String::new() |
| }.lower(self.tcx)); |
| } |
| Some(recorder::FnRef) => { |
| self.dumper.function_ref(FunctionRefData { |
| span: vrd.span, |
| ref_id: vrd.ref_id, |
| scope: vrd.scope |
| }.lower(self.tcx)); |
| } |
| Some(recorder::ModRef) => { |
| self.dumper.mod_ref( ModRefData { |
| span: vrd.span, |
| ref_id: Some(vrd.ref_id), |
| scope: vrd.scope, |
| qualname: String::new() |
| }.lower(self.tcx)); |
| } |
| Some(recorder::VarRef) | None |
| => self.dumper.variable_ref(vrd.lower(self.tcx)) |
| } |
| } |
| |
| } |
| Data::TypeRefData(trd) => { |
| if !self.span.filter_generated(Some(trd.span), path.span) { |
| self.dumper.type_ref(trd.lower(self.tcx)); |
| } |
| } |
| Data::MethodCallData(mcd) => { |
| if !self.span.filter_generated(Some(mcd.span), path.span) { |
| self.dumper.method_call(mcd.lower(self.tcx)); |
| } |
| } |
| Data::FunctionCallData(fcd) => { |
| if !self.span.filter_generated(Some(fcd.span), path.span) { |
| self.dumper.function_call(fcd.lower(self.tcx)); |
| } |
| } |
| _ => { |
| span_bug!(path.span, "Unexpected data: {:?}", path_data); |
| } |
| } |
| |
| // Modules or types in the path prefix. |
| match self.tcx.expect_def(id) { |
| Def::Method(did) => { |
| let ti = self.tcx.impl_or_trait_item(did); |
| if let ty::MethodTraitItem(m) = ti { |
| if m.explicit_self == ty::ExplicitSelfCategory::Static { |
| self.write_sub_path_trait_truncated(path); |
| } |
| } |
| } |
| Def::Local(..) | |
| Def::Static(_,_) | |
| Def::Const(..) | |
| Def::AssociatedConst(..) | |
| Def::Struct(..) | |
| Def::Variant(..) | |
| Def::Fn(..) => self.write_sub_paths_truncated(path, false), |
| _ => {} |
| } |
| } |
| |
| fn process_struct_lit(&mut self, |
| ex: &ast::Expr, |
| path: &ast::Path, |
| fields: &Vec<ast::Field>, |
| variant: ty::VariantDef, |
| base: &Option<P<ast::Expr>>) { |
| self.write_sub_paths_truncated(path, false); |
| |
| if let Some(struct_lit_data) = self.save_ctxt.get_expr_data(ex) { |
| down_cast_data!(struct_lit_data, TypeRefData, ex.span); |
| if !self.span.filter_generated(Some(struct_lit_data.span), ex.span) { |
| self.dumper.type_ref(struct_lit_data.lower(self.tcx)); |
| } |
| |
| let scope = self.save_ctxt.enclosing_scope(ex.id); |
| |
| for field in fields { |
| if let Some(field_data) = self.save_ctxt |
| .get_field_ref_data(field, variant, scope) { |
| |
| if !self.span.filter_generated(Some(field_data.span), field.ident.span) { |
| self.dumper.variable_ref(field_data.lower(self.tcx)); |
| } |
| } |
| |
| self.visit_expr(&field.expr) |
| } |
| } |
| |
| walk_list!(self, visit_expr, base); |
| } |
| |
| fn process_method_call(&mut self, ex: &ast::Expr, args: &Vec<P<ast::Expr>>) { |
| if let Some(mcd) = self.save_ctxt.get_expr_data(ex) { |
| down_cast_data!(mcd, MethodCallData, ex.span); |
| if !self.span.filter_generated(Some(mcd.span), ex.span) { |
| self.dumper.method_call(mcd.lower(self.tcx)); |
| } |
| } |
| |
| // walk receiver and args |
| walk_list!(self, visit_expr, args); |
| } |
| |
| fn process_pat(&mut self, p: &ast::Pat) { |
| match p.node { |
| PatKind::Struct(ref path, ref fields, _) => { |
| visit::walk_path(self, path); |
| let adt = self.tcx.node_id_to_type(p.id).ty_adt_def().unwrap(); |
| let variant = adt.variant_of_def(self.tcx.expect_def(p.id)); |
| |
| for &Spanned { node: ref field, span } in fields { |
| let sub_span = self.span.span_for_first_ident(span); |
| if let Some(f) = variant.find_field_named(field.ident.name) { |
| if !self.span.filter_generated(sub_span, span) { |
| self.dumper.variable_ref(VariableRefData { |
| span: sub_span.expect("No span fund for var ref"), |
| ref_id: f.did, |
| scope: self.cur_scope, |
| name: String::new() |
| }.lower(self.tcx)); |
| } |
| } |
| self.visit_pat(&field.pat); |
| } |
| } |
| _ => visit::walk_pat(self, p), |
| } |
| } |
| |
| |
| fn process_var_decl(&mut self, p: &ast::Pat, value: String) { |
| // The local could declare multiple new vars, we must walk the |
| // pattern and collect them all. |
| let mut collector = PathCollector::new(); |
| collector.visit_pat(&p); |
| self.visit_pat(&p); |
| |
| for &(id, ref p, immut, _) in &collector.collected_paths { |
| let mut value = if immut == ast::Mutability::Immutable { |
| value.to_string() |
| } else { |
| "<mutable>".to_string() |
| }; |
| let types = self.tcx.node_types(); |
| let typ = types.get(&id).map(|t| t.to_string()).unwrap_or(String::new()); |
| value.push_str(": "); |
| value.push_str(&typ); |
| // Get the span only for the name of the variable (I hope the path |
| // is only ever a variable name, but who knows?). |
| let sub_span = self.span.span_for_last_ident(p.span); |
| // Rust uses the id of the pattern for var lookups, so we'll use it too. |
| if !self.span.filter_generated(sub_span, p.span) { |
| self.dumper.variable(VariableData { |
| span: sub_span.expect("No span found for variable"), |
| kind: VariableKind::Local, |
| id: id, |
| name: path_to_string(p), |
| qualname: format!("{}${}", path_to_string(p), id), |
| value: value, |
| type_value: typ, |
| scope: 0 |
| }.lower(self.tcx)); |
| } |
| } |
| } |
| |
| /// Extract macro use and definition information from the AST node defined |
| /// by the given NodeId, using the expansion information from the node's |
| /// span. |
| /// |
| /// If the span is not macro-generated, do nothing, else use callee and |
| /// callsite spans to record macro definition and use data, using the |
| /// mac_uses and mac_defs sets to prevent multiples. |
| fn process_macro_use(&mut self, span: Span, id: NodeId) { |
| let data = match self.save_ctxt.get_macro_use_data(span, id) { |
| None => return, |
| Some(data) => data, |
| }; |
| let mut hasher = SipHasher::new(); |
| data.callee_span.hash(&mut hasher); |
| let hash = hasher.finish(); |
| let qualname = format!("{}::{}", data.name, hash); |
| // Don't write macro definition for imported macros |
| if !self.mac_defs.contains(&data.callee_span) |
| && !data.imported { |
| self.mac_defs.insert(data.callee_span); |
| if let Some(sub_span) = self.span.span_for_macro_def_name(data.callee_span) { |
| self.dumper.macro_data(MacroData { |
| span: sub_span, |
| name: data.name.clone(), |
| qualname: qualname.clone() |
| }.lower(self.tcx)); |
| } |
| } |
| if !self.mac_uses.contains(&data.span) { |
| self.mac_uses.insert(data.span); |
| if let Some(sub_span) = self.span.span_for_macro_use_name(data.span) { |
| self.dumper.macro_use(MacroUseData { |
| span: sub_span, |
| name: data.name, |
| qualname: qualname, |
| scope: data.scope, |
| callee_span: data.callee_span, |
| imported: data.imported |
| }.lower(self.tcx)); |
| } |
| } |
| } |
| } |
| |
| impl<'l, 'tcx: 'l, 'll, D: Dump +'ll> Visitor for DumpVisitor<'l, 'tcx, 'll, D> { |
| fn visit_item(&mut self, item: &ast::Item) { |
| use syntax::ast::ItemKind::*; |
| self.process_macro_use(item.span, item.id); |
| match item.node { |
| Use(ref use_item) => { |
| match use_item.node { |
| ast::ViewPathSimple(ident, ref path) => { |
| let sub_span = self.span.span_for_last_ident(path.span); |
| let mod_id = match self.lookup_type_ref(item.id) { |
| Some(def_id) => { |
| let scope = self.cur_scope; |
| self.process_def_kind(item.id, path.span, sub_span, def_id, scope); |
| |
| Some(def_id) |
| } |
| None => None, |
| }; |
| |
| // 'use' always introduces an alias, if there is not an explicit |
| // one, there is an implicit one. |
| let sub_span = match self.span.sub_span_after_keyword(use_item.span, |
| keywords::As) { |
| Some(sub_span) => Some(sub_span), |
| None => sub_span, |
| }; |
| |
| if !self.span.filter_generated(sub_span, path.span) { |
| self.dumper.use_data(UseData { |
| span: sub_span.expect("No span found for use"), |
| id: item.id, |
| mod_id: mod_id, |
| name: ident.to_string(), |
| scope: self.cur_scope |
| }.lower(self.tcx)); |
| } |
| self.write_sub_paths_truncated(path, true); |
| } |
| ast::ViewPathGlob(ref path) => { |
| // Make a comma-separated list of names of imported modules. |
| let mut names = vec![]; |
| let glob_map = &self.analysis.glob_map; |
| let glob_map = glob_map.as_ref().unwrap(); |
| if glob_map.contains_key(&item.id) { |
| for n in glob_map.get(&item.id).unwrap() { |
| names.push(n.to_string()); |
| } |
| } |
| |
| let sub_span = self.span |
| .sub_span_of_token(item.span, token::BinOp(token::Star)); |
| if !self.span.filter_generated(sub_span, item.span) { |
| self.dumper.use_glob(UseGlobData { |
| span: sub_span.expect("No span found for use glob"), |
| id: item.id, |
| names: names, |
| scope: self.cur_scope |
| }.lower(self.tcx)); |
| } |
| self.write_sub_paths(path, true); |
| } |
| ast::ViewPathList(ref path, ref list) => { |
| for plid in list { |
| match plid.node { |
| ast::PathListItemKind::Ident { id, .. } => { |
| let scope = self.cur_scope; |
| if let Some(def_id) = self.lookup_type_ref(id) { |
| self.process_def_kind(id, |
| plid.span, |
| Some(plid.span), |
| def_id, |
| scope); |
| } |
| } |
| ast::PathListItemKind::Mod { .. } => (), |
| } |
| } |
| |
| self.write_sub_paths(path, true); |
| } |
| } |
| } |
| ExternCrate(ref s) => { |
| let location = match *s { |
| Some(s) => s.to_string(), |
| None => item.ident.to_string(), |
| }; |
| let alias_span = self.span.span_for_last_ident(item.span); |
| let cnum = match self.sess.cstore.extern_mod_stmt_cnum(item.id) { |
| Some(cnum) => cnum, |
| None => 0, |
| }; |
| |
| if !self.span.filter_generated(alias_span, item.span) { |
| self.dumper.extern_crate(ExternCrateData { |
| id: item.id, |
| name: item.ident.to_string(), |
| crate_num: cnum, |
| location: location, |
| span: alias_span.expect("No span found for extern crate"), |
| scope: self.cur_scope, |
| }.lower(self.tcx)); |
| } |
| } |
| Fn(ref decl, _, _, _, ref ty_params, ref body) => |
| self.process_fn(item, &decl, ty_params, &body), |
| Static(ref typ, _, ref expr) => |
| self.process_static_or_const_item(item, typ, expr), |
| Const(ref typ, ref expr) => |
| self.process_static_or_const_item(item, &typ, &expr), |
| Struct(ref def, ref ty_params) => self.process_struct(item, def, ty_params), |
| Enum(ref def, ref ty_params) => self.process_enum(item, def, ty_params), |
| Impl(_, _, |
| ref ty_params, |
| ref trait_ref, |
| ref typ, |
| ref impl_items) => { |
| self.process_impl(item, ty_params, trait_ref, &typ, impl_items) |
| } |
| Trait(_, ref generics, ref trait_refs, ref methods) => |
| self.process_trait(item, generics, trait_refs, methods), |
| Mod(ref m) => { |
| self.process_mod(item); |
| self.nest(item.id, |v| visit::walk_mod(v, m)); |
| } |
| Ty(ref ty, ref ty_params) => { |
| let qualname = format!("::{}", self.tcx.node_path_str(item.id)); |
| let value = ty_to_string(&ty); |
| let sub_span = self.span.sub_span_after_keyword(item.span, keywords::Type); |
| if !self.span.filter_generated(sub_span, item.span) { |
| self.dumper.typedef(TypeDefData { |
| span: sub_span.expect("No span found for typedef"), |
| name: item.ident.to_string(), |
| id: item.id, |
| qualname: qualname.clone(), |
| value: value |
| }.lower(self.tcx)); |
| } |
| |
| self.visit_ty(&ty); |
| self.process_generic_params(ty_params, item.span, &qualname, item.id); |
| } |
| Mac(_) => (), |
| _ => visit::walk_item(self, item), |
| } |
| } |
| |
| fn visit_generics(&mut self, generics: &ast::Generics) { |
| for param in generics.ty_params.iter() { |
| for bound in param.bounds.iter() { |
| if let ast::TraitTyParamBound(ref trait_ref, _) = *bound { |
| self.process_trait_ref(&trait_ref.trait_ref); |
| } |
| } |
| if let Some(ref ty) = param.default { |
| self.visit_ty(&ty); |
| } |
| } |
| } |
| |
| fn visit_trait_item(&mut self, trait_item: &ast::TraitItem) { |
| self.process_macro_use(trait_item.span, trait_item.id); |
| match trait_item.node { |
| ast::TraitItemKind::Const(ref ty, Some(ref expr)) => { |
| self.process_const(trait_item.id, |
| trait_item.ident.name, |
| trait_item.span, |
| &ty, |
| &expr); |
| } |
| ast::TraitItemKind::Method(ref sig, ref body) => { |
| self.process_method(sig, |
| body.as_ref().map(|x| &**x), |
| trait_item.id, |
| trait_item.ident.name, |
| trait_item.span); |
| } |
| ast::TraitItemKind::Const(_, None) | |
| ast::TraitItemKind::Type(..) | |
| ast::TraitItemKind::Macro(_) => {} |
| } |
| } |
| |
| fn visit_impl_item(&mut self, impl_item: &ast::ImplItem) { |
| self.process_macro_use(impl_item.span, impl_item.id); |
| match impl_item.node { |
| ast::ImplItemKind::Const(ref ty, ref expr) => { |
| self.process_const(impl_item.id, |
| impl_item.ident.name, |
| impl_item.span, |
| &ty, |
| &expr); |
| } |
| ast::ImplItemKind::Method(ref sig, ref body) => { |
| self.process_method(sig, |
| Some(body), |
| impl_item.id, |
| impl_item.ident.name, |
| impl_item.span); |
| } |
| ast::ImplItemKind::Type(_) | |
| ast::ImplItemKind::Macro(_) => {} |
| } |
| } |
| |
| fn visit_ty(&mut self, t: &ast::Ty) { |
| self.process_macro_use(t.span, t.id); |
| match t.node { |
| ast::TyKind::Path(_, ref path) => { |
| if let Some(id) = self.lookup_type_ref(t.id) { |
| let sub_span = self.span.sub_span_for_type_name(t.span); |
| if !self.span.filter_generated(sub_span, t.span) { |
| self.dumper.type_ref(TypeRefData { |
| span: sub_span.expect("No span found for type ref"), |
| ref_id: Some(id), |
| scope: self.cur_scope, |
| qualname: String::new() |
| }.lower(self.tcx)); |
| } |
| } |
| |
| self.write_sub_paths_truncated(path, false); |
| |
| visit::walk_path(self, path); |
| } |
| _ => visit::walk_ty(self, t), |
| } |
| } |
| |
| fn visit_expr(&mut self, ex: &ast::Expr) { |
| self.process_macro_use(ex.span, ex.id); |
| match ex.node { |
| ast::ExprKind::Call(ref _f, ref _args) => { |
| // Don't need to do anything for function calls, |
| // because just walking the callee path does what we want. |
| visit::walk_expr(self, ex); |
| } |
| ast::ExprKind::Path(_, ref path) => { |
| self.process_path(ex.id, path, None); |
| visit::walk_expr(self, ex); |
| } |
| ast::ExprKind::Struct(ref path, ref fields, ref base) => { |
| let hir_expr = self.save_ctxt.tcx.map.expect_expr(ex.id); |
| let adt = self.tcx.expr_ty(&hir_expr).ty_adt_def().unwrap(); |
| let def = self.tcx.expect_def(hir_expr.id); |
| self.process_struct_lit(ex, path, fields, adt.variant_of_def(def), base) |
| } |
| ast::ExprKind::MethodCall(_, _, ref args) => self.process_method_call(ex, args), |
| ast::ExprKind::Field(ref sub_ex, _) => { |
| self.visit_expr(&sub_ex); |
| |
| if let Some(field_data) = self.save_ctxt.get_expr_data(ex) { |
| down_cast_data!(field_data, VariableRefData, ex.span); |
| if !self.span.filter_generated(Some(field_data.span), ex.span) { |
| self.dumper.variable_ref(field_data.lower(self.tcx)); |
| } |
| } |
| } |
| ast::ExprKind::TupField(ref sub_ex, idx) => { |
| self.visit_expr(&sub_ex); |
| |
| let hir_node = match self.save_ctxt.tcx.map.find(sub_ex.id) { |
| Some(Node::NodeExpr(expr)) => expr, |
| _ => { |
| debug!("Missing or weird node for sub-expression {} in {:?}", |
| sub_ex.id, ex); |
| return; |
| } |
| }; |
| let ty = &self.tcx.expr_ty_adjusted(&hir_node).sty; |
| match *ty { |
| ty::TyStruct(def, _) => { |
| let sub_span = self.span.sub_span_after_token(ex.span, token::Dot); |
| if !self.span.filter_generated(sub_span, ex.span) { |
| self.dumper.variable_ref(VariableRefData { |
| span: sub_span.expect("No span found for var ref"), |
| ref_id: def.struct_variant().fields[idx.node].did, |
| scope: self.cur_scope, |
| name: String::new() |
| }.lower(self.tcx)); |
| } |
| } |
| ty::TyTuple(_) => {} |
| _ => span_bug!(ex.span, |
| "Expected struct or tuple type, found {:?}", |
| ty), |
| } |
| } |
| ast::ExprKind::Closure(_, ref decl, ref body, _fn_decl_span) => { |
| let mut id = String::from("$"); |
| id.push_str(&ex.id.to_string()); |
| self.process_formals(&decl.inputs, &id); |
| |
| // walk arg and return types |
| for arg in &decl.inputs { |
| self.visit_ty(&arg.ty); |
| } |
| |
| if let ast::FunctionRetTy::Ty(ref ret_ty) = decl.output { |
| self.visit_ty(&ret_ty); |
| } |
| |
| // walk the body |
| self.nest(ex.id, |v| v.visit_block(&body)); |
| } |
| ast::ExprKind::ForLoop(ref pattern, ref subexpression, ref block, _) | |
| ast::ExprKind::WhileLet(ref pattern, ref subexpression, ref block, _) => { |
| let value = self.span.snippet(subexpression.span); |
| self.process_var_decl(pattern, value); |
| visit::walk_expr(self, subexpression); |
| visit::walk_block(self, block); |
| } |
| ast::ExprKind::IfLet(ref pattern, ref subexpression, ref block, ref opt_else) => { |
| let value = self.span.snippet(subexpression.span); |
| self.process_var_decl(pattern, value); |
| visit::walk_expr(self, subexpression); |
| visit::walk_block(self, block); |
| opt_else.as_ref().map(|el| visit::walk_expr(self, el)); |
| } |
| _ => { |
| visit::walk_expr(self, ex) |
| } |
| } |
| } |
| |
| fn visit_mac(&mut self, mac: &ast::Mac) { |
| // These shouldn't exist in the AST at this point, log a span bug. |
| span_bug!(mac.span, "macro invocation should have been expanded out of AST"); |
| } |
| |
| fn visit_pat(&mut self, p: &ast::Pat) { |
| self.process_macro_use(p.span, p.id); |
| self.process_pat(p); |
| } |
| |
| fn visit_arm(&mut self, arm: &ast::Arm) { |
| let mut collector = PathCollector::new(); |
| for pattern in &arm.pats { |
| // collect paths from the arm's patterns |
| collector.visit_pat(&pattern); |
| self.visit_pat(&pattern); |
| } |
| |
| // This is to get around borrow checking, because we need mut self to call process_path. |
| let mut paths_to_process = vec![]; |
| |
| // process collected paths |
| for &(id, ref p, immut, ref_kind) in &collector.collected_paths { |
| match self.tcx.expect_def(id) { |
| Def::Local(_, id) => { |
| let value = if immut == ast::Mutability::Immutable { |
| self.span.snippet(p.span).to_string() |
| } else { |
| "<mutable>".to_string() |
| }; |
| |
| assert!(p.segments.len() == 1, |
| "qualified path for local variable def in arm"); |
| if !self.span.filter_generated(Some(p.span), p.span) { |
| self.dumper.variable(VariableData { |
| span: p.span, |
| kind: VariableKind::Local, |
| id: id, |
| name: path_to_string(p), |
| qualname: format!("{}${}", path_to_string(p), id), |
| value: value, |
| type_value: String::new(), |
| scope: 0 |
| }.lower(self.tcx)); |
| } |
| } |
| Def::Variant(..) | Def::Enum(..) | |
| Def::TyAlias(..) | Def::Struct(..) => { |
| paths_to_process.push((id, p.clone(), Some(ref_kind))) |
| } |
| // FIXME(nrc) what are these doing here? |
| Def::Static(_, _) | |
| Def::Const(..) | |
| Def::AssociatedConst(..) => {} |
| def => error!("unexpected definition kind when processing collected paths: {:?}", |
| def), |
| } |
| } |
| |
| for &(id, ref path, ref_kind) in &paths_to_process { |
| self.process_path(id, path, ref_kind); |
| } |
| walk_list!(self, visit_expr, &arm.guard); |
| self.visit_expr(&arm.body); |
| } |
| |
| fn visit_stmt(&mut self, s: &ast::Stmt) { |
| self.process_macro_use(s.span, s.id); |
| visit::walk_stmt(self, s) |
| } |
| |
| fn visit_local(&mut self, l: &ast::Local) { |
| self.process_macro_use(l.span, l.id); |
| let value = l.init.as_ref().map(|i| self.span.snippet(i.span)).unwrap_or(String::new()); |
| self.process_var_decl(&l.pat, value); |
| |
| // Just walk the initialiser and type (don't want to walk the pattern again). |
| walk_list!(self, visit_ty, &l.ty); |
| walk_list!(self, visit_expr, &l.init); |
| } |
| } |
