Made changes to how 'struct'/'class' mismatches are handled in -Wmismatched-tags.

- Removed fix-it hints from template instaniations since changes to the
templates are rarely helpful.
- Changed the caret in template instaniations from the class/struct name to the
class/struct keyword, matching the other warnings.
- Do not offer fix-it hints when multiple declarations disagree.  Warnings are
still given.
- Once a definition is found, offer a fix-it hint to all previous declarations
with wrong tag.
- Declarations that disagree with a previous definition will get a fix-it hint
to change the declaration.

llvm-svn: 132831

1 files changed, 2 insertions, 1 deletions

diff --git a/clang/lib/Sema/TreeTransform.h b/clang/lib/Sema/TreeTransform.h
index 06017e7cbab..245499e8a1c 100644
--- a/clang/lib/Sema/TreeTransform.h
+++ b/clang/lib/Sema/TreeTransform.h
@@ -879,7 +879,8 @@ public:
       return QualType();
     }
 
-    if (!SemaRef.isAcceptableTagRedeclaration(Tag, Kind, IdLoc, *Id)) {
+    if (!SemaRef.isAcceptableTagRedeclaration(Tag, Kind, /*isDefinition*/false,
+                                              IdLoc, *Id)) {
       SemaRef.Diag(KeywordLoc, diag::err_use_with_wrong_tag) << Id;
       SemaRef.Diag(Tag->getLocation(), diag::note_previous_use);
       return QualType();