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authorbors <bors@rust-lang.org>2014-11-17 20:37:19 +0000
committerbors <bors@rust-lang.org>2014-11-17 20:37:19 +0000
commit336349c93207d792587eb0b5258b29da6ec0db8a (patch)
tree1b4b1c0298399f1d57a0fce546f8b63cbb2d7217 /src/libsyntax
parentf09279395b6ca40f1398277971586197f949738a (diff)
parent99fbd34d7e60faf99afd5065eb55c4fc19af87ec (diff)
downloadrust-336349c93207d792587eb0b5258b29da6ec0db8a.tar.gz
rust-336349c93207d792587eb0b5258b29da6ec0db8a.zip
auto merge of #18694 : nikomatsakis/rust/issue-18208-method-dispatch-2, r=nrc
This is a pretty major refactoring of the method dispatch infrastructure. It is intended to avoid gross inefficiencies and enable caching and other optimizations (e.g. #17995), though it itself doesn't seem to execute particularly faster yet. It also solves some cases where we were failing to resolve methods that we theoretically should have succeeded with.

Fixes #18674.

cc #18208 

Diffstat (limited to 'src/libsyntax')
-rw-r--r--src/libsyntax/ast_map/mod.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/ast_map/mod.rs b/src/libsyntax/ast_map/mod.rs
index 2a2ad9fd664..b116c84552e 100644
--- a/src/libsyntax/ast_map/mod.rs
+++ b/src/libsyntax/ast_map/mod.rs
@@ -544,7 +544,7 @@ impl<'ast> Map<'ast> {
 
     pub fn def_id_span(&self, def_id: DefId, fallback: Span) -> Span {
         if def_id.krate == LOCAL_CRATE {
-            self.span(def_id.node)
+            self.opt_span(def_id.node).unwrap_or(fallback)
         } else {
             fallback
         }