Auto merge of #28009 - GuillaumeGomez:patch-1, r=Manishearth

bors · bors · commit f9f82f8dc8c9 · 2015-08-31T16:52:46.000Z
r? @Manishearth
diff --git a/src/librustc_typeck/check/mod.rs b/src/librustc_typeck/check/mod.rs
@@ -729,6 +729,9 @@ pub fn check_item_type<'a,'tcx>(ccx: &CrateCtxt<'a,'tcx>, it: &'tcx ast::Item) {
                 if !pty.generics.types.is_empty() {
                     span_err!(ccx.tcx.sess, item.span, E0044,
                         "foreign items may not have type parameters");
+                    span_help!(ccx.tcx.sess, item.span,
+                        "consider using specialization instead of \
+                        type parameters");
                 }
 
                 if let ast::ForeignItemFn(ref fn_decl, _) = item.node {

Original file line number	Diff line number	Diff line change
`@@ -729,6 +729,9 @@ pub fn check_item_type<'a,'tcx>(ccx: &CrateCtxt<'a,'tcx>, it: &'tcx ast::Item) {`
`729`	`729`	`if !pty.generics.types.is_empty() {`
`730`	`730`	`span_err!(ccx.tcx.sess, item.span, E0044,`
`731`	`731`	`"foreign items may not have type parameters");`
	`732`	`+ span_help!(ccx.tcx.sess, item.span,`
	`733`	`+ "consider using specialization instead of \`
	`734`	`+ type parameters");`
`732`	`735`	`}`
`733`	`736`
`734`	`737`	`if let ast::ForeignItemFn(ref fn_decl, _) = item.node {`