use syntax::print::pprust::{
bounds_to_string,
generic_params_to_string,
- path_to_string,
ty_to_string
};
use syntax::ptr::P;
self.dumper.compilation_opts(data);
}
- // 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 segments = &path.segments[if path.is_global() { 1 } else { 0 }..];
-
- let mut result = Vec::with_capacity(segments.len());
- let mut segs = Vec::with_capacity(segments.len());
-
- for (i, seg) in segments.iter().enumerate() {
- segs.push(seg.clone());
- let sub_path = ast::Path {
- span: seg.ident.span, // span for the last segment
- segments: segs,
- };
- let qualname = if i == 0 && path.is_global() {
- format!("::{}", path_to_string(&sub_path))
- } else {
- path_to_string(&sub_path)
- };
- result.push((seg.ident.span, qualname));
- segs = sub_path.segments;
- }
-
- result
- }
-
fn write_sub_paths(&mut self, path: &ast::Path) {
- let sub_paths = self.process_path_prefixes(path);
- for (span, _) in sub_paths {
- let span = self.span_from_span(span);
- self.dumper.dump_ref(Ref {
- kind: RefKind::Mod,
- span,
- ref_id: ::null_id(),
- });
+ for seg in &path.segments {
+ if let Some(data) = self.save_ctxt.get_path_segment_data(seg) {
+ self.dumper.dump_ref(data);
+ }
}
}
// 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) {
- let sub_paths = self.process_path_prefixes(path);
- let len = sub_paths.len();
- if len <= 1 {
- return;
- }
-
- for (span, _) in sub_paths.into_iter().take(len - 1) {
- let span = self.span_from_span(span);
- self.dumper.dump_ref(Ref {
- kind: RefKind::Mod,
- span,
- ref_id: ::null_id(),
- });
- }
- }
-
- // 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, _) = sub_paths[len - 2];
- let span = self.span_from_span(*span);
- self.dumper.dump_ref(Ref {
- kind: RefKind::Type,
- ref_id: ::null_id(),
- span,
- });
-
- // write the other sub-paths
- if len <= 2 {
- return;
- }
- let sub_paths = &sub_paths[..len - 2];
- for &(ref span, _) in sub_paths {
- let span = self.span_from_span(*span);
- self.dumper.dump_ref(Ref {
- kind: RefKind::Mod,
- span,
- ref_id: ::null_id(),
- });
+ for seg in &path.segments[..path.segments.len() - 1] {
+ if let Some(data) = self.save_ctxt.get_path_segment_data(seg) {
+ self.dumper.dump_ref(data);
+ }
}
}
}
}
- // Modules or types in the path prefix.
- match self.save_ctxt.get_path_def(id) {
- HirDef::Method(did) => {
- let ti = self.tcx.associated_item(did);
- if ti.kind == ty::AssociatedKind::Method && ti.method_has_self_argument {
- self.write_sub_path_trait_truncated(path);
- }
- }
- HirDef::Fn(..) |
- HirDef::Const(..) |
- HirDef::Static(..) |
- HirDef::StructCtor(..) |
- HirDef::VariantCtor(..) |
- HirDef::AssociatedConst(..) |
- HirDef::Local(..) |
- HirDef::Upvar(..) |
- HirDef::Struct(..) |
- HirDef::Union(..) |
- HirDef::Variant(..) |
- HirDef::TyAlias(..) |
- HirDef::AssociatedTy(..) => self.write_sub_paths_truncated(path),
- _ => {}
- }
+ self.write_sub_paths_truncated(path);
}
fn process_struct_lit(
}
}
- pub fn get_path_data(&self, id: NodeId, path: &ast::Path) -> Option<Ref> {
+ pub fn get_path_data(&self, _id: NodeId, path: &ast::Path) -> Option<Ref> {
+ path.segments.last().and_then(|seg| self.get_path_segment_data(seg))
+ }
+
+ pub fn get_path_segment_data(&self, path_seg: &ast::PathSegment) -> 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 generic_args) = path.segments[0].args {
+ fn fn_type(seg: &ast::PathSegment) -> bool {
+ if let Some(ref generic_args) = seg.args {
if let ast::GenericArgs::Parenthesized(_) = **generic_args {
return true;
}
false
}
- if path.segments.is_empty() {
- return None;
- }
+ let def = self.get_path_def(path_seg.id);
+ let span = path_seg.ident.span;
+ filter!(self.span_utils, span);
+ let span = self.span_from_span(span);
- let def = self.get_path_def(id);
- let last_seg = &path.segments[path.segments.len() - 1];
- let sub_span = last_seg.ident.span;
- filter!(self.span_utils, sub_span);
match def {
HirDef::Upvar(id, ..) | HirDef::Local(id) => {
- let span = self.span_from_span(sub_span);
Some(Ref {
kind: RefKind::Variable,
span,
HirDef::Const(..) |
HirDef::AssociatedConst(..) |
HirDef::VariantCtor(..) => {
- let span = self.span_from_span(sub_span);
Some(Ref {
kind: RefKind::Variable,
span,
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 = path.segments.first().unwrap().ident.span;
+ HirDef::Trait(def_id) if fn_type(path_seg) => {
Some(Ref {
kind: RefKind::Type,
- span: self.span_from_span(fn_span),
+ span,
ref_id: id_from_def_id(def_id),
})
}
HirDef::Trait(def_id) |
HirDef::Existential(def_id) |
HirDef::TyParam(def_id) => {
- let span = self.span_from_span(sub_span);
Some(Ref {
kind: RefKind::Type,
span,
// 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);
let parent_def_id = self.tcx.parent_def_id(def_id).unwrap();
Some(Ref {
kind: RefKind::Type,
} else {
None
};
- let span = self.span_from_span(sub_span);
Some(Ref {
kind: RefKind::Function,
span,
})
}
HirDef::Fn(def_id) => {
- let span = self.span_from_span(sub_span);
Some(Ref {
kind: RefKind::Function,
span,
})
}
HirDef::Mod(def_id) => {
- let span = self.span_from_span(sub_span);
Some(Ref {
kind: RefKind::Mod,
span,
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