let mut collector = PathCollector::new();
collector.visit_pat(&arg.pat);
let span_utils = self.span.clone();
- for &(id, ref p, ..) in &collector.collected_paths {
+
+ for (id, i, sp, ..) in collector.collected_idents {
let hir_id = self.tcx.hir.node_to_hir_id(id);
let typ = match self.save_ctxt.tables.node_id_to_type_opt(hir_id) {
Some(s) => s.to_string(),
None => continue,
};
- // 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) {
+ let sub_span = span_utils.span_for_last_ident(sp);
+ if !self.span.filter_generated(sub_span, sp) {
let id = ::id_from_node_id(id, &self.save_ctxt);
let span = self.span_from_span(sub_span.expect("No span found for variable"));
kind: DefKind::Local,
id,
span,
- name: path_to_string(p),
- qualname: format!("{}::{}", qualname, path_to_string(p)),
+ name: i.to_string(),
+ qualname: format!("{}::{}", qualname, i.to_string()),
value: typ,
parent: None,
children: vec![],
}
}
- fn process_trait_ref(&mut self, trait_ref: &'l ast::TraitRef) {
- let trait_ref_data = self.save_ctxt.get_trait_ref_data(trait_ref);
- if let Some(trait_ref_data) = trait_ref_data {
- self.dumper.dump_ref(trait_ref_data);
- }
- self.process_path(trait_ref.ref_id, &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(field_data) = field_data {
}
}
- fn process_path(&mut self, id: NodeId, path: &ast::Path) {
+ fn process_path(&mut self, id: NodeId, path: &'l ast::Path) {
+ debug!("process_path {:?}", path);
let path_data = self.save_ctxt.get_path_data(id, path);
if generated_code(path.span) && path_data.is_none() {
return;
self.dumper.dump_ref(path_data);
+ // Type parameters
+ for seg in &path.segments {
+ if let Some(ref params) = seg.parameters {
+ match **params {
+ ast::PathParameters::AngleBracketed(ref data) => {
+ for t in &data.types {
+ self.visit_ty(t);
+ }
+ }
+ ast::PathParameters::Parenthesized(ref data) => {
+ for t in &data.inputs {
+ self.visit_ty(t);
+ }
+ if let Some(ref t) = data.output {
+ self.visit_ty(t);
+ }
+ }
+ }
+ }
+ }
+
// Modules or types in the path prefix.
match self.save_ctxt.get_path_def(id) {
HirDef::Method(did) => {
walk_list!(self, visit_expr, base);
}
- fn process_method_call(&mut self, ex: &'l ast::Expr, args: &'l [P<ast::Expr>]) {
+ fn process_method_call(&mut self,
+ ex: &'l ast::Expr,
+ seg: &'l ast::PathSegment,
+ args: &'l [P<ast::Expr>]) {
if let Some(mcd) = self.save_ctxt.get_expr_data(ex) {
down_cast_data!(mcd, RefData, ex.span);
if !generated_code(ex.span) {
}
}
+ // Explicit types in the turbo-fish.
+ if let Some(ref params) = seg.parameters {
+ if let ast::PathParameters::AngleBracketed(ref data) = **params {
+ for t in &data.types {
+ self.visit_ty(t);
+ }
+ }
+ }
+
// walk receiver and args
walk_list!(self, visit_expr, args);
}
collector.visit_pat(&p);
self.visit_pat(&p);
- for &(id, ref p, immut) in &collector.collected_paths {
+ for (id, i, sp, immut) in collector.collected_idents {
let mut value = match immut {
ast::Mutability::Immutable => value.to_string(),
_ => String::new(),
// 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);
+ let sub_span = self.span.span_for_last_ident(sp);
// 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) {
- let qualname = format!("{}${}", path_to_string(p), id);
+ if !self.span.filter_generated(sub_span, sp) {
+ let qualname = format!("{}${}", i.to_string(), id);
let id = ::id_from_node_id(id, &self.save_ctxt);
let span = self.span_from_span(sub_span.expect("No span found for variable"));
kind: DefKind::Local,
id,
span,
- name: path_to_string(p),
+ name: i.to_string(),
qualname,
value: typ,
parent: None,
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);
+ self.process_path(trait_ref.trait_ref.ref_id, &trait_ref.trait_ref.path)
}
}
if let Some(ref ty) = param.default {
let def = self.save_ctxt.get_path_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::MethodCall(ref seg, ref args) => self.process_method_call(ex, seg, args),
ast::ExprKind::Field(ref sub_ex, _) => {
self.visit_expr(&sub_ex);
let value = self.span.snippet(subexpression.span);
self.process_var_decl(pattern, value);
debug!("for loop, walk sub-expr: {:?}", subexpression.node);
- visit::walk_expr(self, subexpression);
+ self.visit_expr(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);
+ self.visit_expr(subexpression);
visit::walk_block(self, block);
- opt_else.as_ref().map(|el| visit::walk_expr(self, el));
+ opt_else.as_ref().map(|el| self.visit_expr(el));
}
ast::ExprKind::Repeat(ref element, ref count) => {
self.visit_expr(element);
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) in &collector.collected_paths {
+ for (id, i, sp, immut) in collector.collected_idents {
match self.save_ctxt.get_path_def(id) {
HirDef::Local(id) => {
let mut value = if immut == ast::Mutability::Immutable {
- self.span.snippet(p.span).to_string()
+ self.span.snippet(sp).to_string()
} else {
"<mutable>".to_string()
};
value.push_str(": ");
value.push_str(&typ);
- assert!(p.segments.len() == 1,
- "qualified path for local variable def in arm");
- if !self.span.filter_generated(Some(p.span), p.span) {
- let qualname = format!("{}${}", path_to_string(p), id);
+ if !self.span.filter_generated(Some(sp), sp) {
+ let qualname = format!("{}${}", i.to_string(), id);
let id = ::id_from_node_id(id, &self.save_ctxt);
- let span = self.span_from_span(p.span);
+ let span = self.span_from_span(sp);
self.dumper.dump_def(false, Def {
kind: DefKind::Local,
id,
span,
- name: path_to_string(p),
+ name: i.to_string(),
qualname,
value: typ,
parent: None,
});
}
}
- HirDef::StructCtor(..) | HirDef::VariantCtor(..) |
- HirDef::Const(..) | HirDef::AssociatedConst(..) |
- HirDef::Struct(..) | HirDef::Variant(..) |
- HirDef::TyAlias(..) | HirDef::AssociatedTy(..) |
- HirDef::SelfTy(..) => {
- paths_to_process.push((id, p.clone()))
- }
- def => error!("unexpected definition kind when processing collected paths: {:?}",
+ def => error!("unexpected definition kind when processing collected idents: {:?}",
def),
}
}
- for &(id, ref path) in &paths_to_process {
+ for (id, ref path) in collector.collected_paths {
self.process_path(id, path);
}
walk_list!(self, visit_expr, &arm.guard);
Node::NodeItem(&hir::Item { node: hir::ItemUse(ref path, _), .. }) |
Node::NodeVisibility(&hir::Visibility::Restricted { ref path, .. }) => path.def,
- Node::NodeExpr(&hir::Expr { node: hir::ExprPath(ref qpath), .. }) |
Node::NodeExpr(&hir::Expr { node: hir::ExprStruct(ref qpath, ..), .. }) |
+ Node::NodeExpr(&hir::Expr { node: hir::ExprPath(ref qpath), .. }) |
Node::NodePat(&hir::Pat { node: hir::PatKind::Path(ref qpath), .. }) |
Node::NodePat(&hir::Pat { node: hir::PatKind::Struct(ref qpath, ..), .. }) |
Node::NodePat(&hir::Pat { node: hir::PatKind::TupleStruct(ref qpath, ..), .. }) => {
}
pub fn get_path_data(&self, id: NodeId, path: &ast::Path) -> Option<Ref> {
+ // Returns true if the path is function type sugar, e.g., `Fn(A) -> B`.
+ fn fn_type(path: &ast::Path) -> bool {
+ if path.segments.len() != 1 {
+ return false;
+ }
+ if let Some(ref params) = path.segments[0].parameters {
+ if let ast::PathParameters::Parenthesized(_) = **params {
+ return true;
+ }
+ }
+ false
+ }
+
let def = self.get_path_def(id);
let sub_span = self.span_utils.span_for_last_ident(path.span);
filter!(self.span_utils, sub_span, path.span, None);
HirDef::Static(..) |
HirDef::Const(..) |
HirDef::AssociatedConst(..) |
- HirDef::StructCtor(..) |
HirDef::VariantCtor(..) => {
let span = self.span_from_span(sub_span.unwrap());
Some(Ref {
ref_id: id_from_def_id(def.def_id()),
})
}
+ HirDef::Trait(def_id) if fn_type(path) => {
+ // Function type bounds are desugared in the parser, so we have to
+ // special case them here.
+ let fn_span = self.span_utils.span_for_first_ident(path.span);
+ fn_span.map(|span| Ref {
+ kind: RefKind::Type,
+ span: self.span_from_span(span),
+ ref_id: id_from_def_id(def_id),
+ })
+ }
HirDef::Struct(def_id) |
HirDef::Variant(def_id, ..) |
HirDef::Union(def_id) |
ref_id: id_from_def_id(def_id),
})
}
+ HirDef::StructCtor(def_id, _) => {
+ // This is a reference to a tuple struct where the def_id points
+ // to an invisible constructor function. That is not a very useful
+ // def, so adjust to point to the tuple struct itself.
+ let span = self.span_from_span(sub_span.unwrap());
+ let parent_def_id = self.tcx.parent_def_id(def_id).unwrap();
+ Some(Ref {
+ kind: RefKind::Type,
+ span,
+ ref_id: id_from_def_id(parent_def_id),
+ })
+ }
HirDef::Method(decl_id) => {
let sub_span = self.span_utils.sub_span_for_meth_name(path.span);
filter!(self.span_utils, sub_span, path.span, None);
sig
}
-// An AST visitor for collecting paths from patterns.
-struct PathCollector {
- // The Row field identifies the kind of pattern.
- collected_paths: Vec<(NodeId, ast::Path, ast::Mutability)>,
+// An AST visitor for collecting paths (e.g., the names of structs) and formal
+// variables (idents) from patterns.
+struct PathCollector<'l> {
+ collected_paths: Vec<(NodeId, &'l ast::Path)>,
+ collected_idents: Vec<(NodeId, ast::Ident, Span, ast::Mutability)>,
}
-impl PathCollector {
- fn new() -> PathCollector {
- PathCollector { collected_paths: vec![] }
+impl<'l> PathCollector<'l> {
+ fn new() -> PathCollector<'l> {
+ PathCollector {
+ collected_paths: vec![],
+ collected_idents: vec![],
+ }
}
}
-impl<'a> Visitor<'a> for PathCollector {
- fn visit_pat(&mut self, p: &ast::Pat) {
+impl<'l, 'a: 'l> Visitor<'a> for PathCollector<'l> {
+ fn visit_pat(&mut self, p: &'a ast::Pat) {
match p.node {
PatKind::Struct(ref path, ..) => {
- self.collected_paths.push((p.id, path.clone(),
- ast::Mutability::Mutable));
+ self.collected_paths.push((p.id, path));
}
PatKind::TupleStruct(ref path, ..) |
PatKind::Path(_, ref path) => {
- self.collected_paths.push((p.id, path.clone(),
- ast::Mutability::Mutable));
+ self.collected_paths.push((p.id, path));
}
PatKind::Ident(bm, ref path1, _) => {
debug!("PathCollector, visit ident in pat {}: {:?} {:?}",
ast::BindingMode::ByRef(_) => ast::Mutability::Immutable,
ast::BindingMode::ByValue(mt) => mt,
};
- // collect path for either visit_local or visit_arm
- let path = ast::Path::from_ident(path1.span, path1.node);
- self.collected_paths.push((p.id, path, immut));
+ self.collected_idents.push((p.id, path1.node, path1.span, immut));
}
_ => {}
}
projects / rust.git / commitdiff