Clarify that ParameterEnvironment::for_item can take impl/trait items too

Manishearth · Manishearth · commit 157ba0038dea · 2016-03-27T12:31:34.000+05:30
diff --git a/src/librustc/ty/mod.rs b/src/librustc/ty/mod.rs
@@ -1202,6 +1202,7 @@ impl<'a, 'tcx> ParameterEnvironment<'a, 'tcx> {
         }
     }
 
+    /// Construct a parameter environment given an item, impl item, or trait item
     pub fn for_item(cx: &'a TyCtxt<'tcx>, id: NodeId) -> ParameterEnvironment<'a, 'tcx> {
         match cx.map.find(id) {
             Some(ast_map::NodeImplItem(ref impl_item)) => {

Original file line number	Diff line number	Diff line change
`@@ -1202,6 +1202,7 @@ impl<'a, 'tcx> ParameterEnvironment<'a, 'tcx> {`
`1202`	`1202`	`}`
`1203`	`1203`	`}`
`1204`	`1204`
	`1205`	`+ /// Construct a parameter environment given an item, impl item, or trait item`
`1205`	`1206`	`pub fn for_item(cx: &'a TyCtxt<'tcx>, id: NodeId) -> ParameterEnvironment<'a, 'tcx> {`
`1206`	`1207`	`match cx.map.find(id) {`
`1207`	`1208`	`Some(ast_map::NodeImplItem(ref impl_item)) => {`