From 8c6519a6e4ed20a9f8cbd32e6454cb0fb556186b Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 22 Jan 2007 07:41:36 +0000
Subject: [PATCH] invoke a new callback when starting to parse a struct/union
 tag

llvm-svn: 39268
---
 clang/Parse/ParseDecl.cpp | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/clang/Parse/ParseDecl.cpp b/clang/Parse/ParseDecl.cpp
index 2727044bce03..2aa36e52f6bb 100644
--- a/clang/Parse/ParseDecl.cpp
+++ b/clang/Parse/ParseDecl.cpp
@@ -439,12 +439,24 @@ void Parser::ParseStructUnionSpecifier(DeclSpec &DS) {
   if (Tok.getKind() != tok::identifier &&
       Tok.getKind() != tok::l_brace) {
     Diag(Tok, diag::err_expected_ident_lbrace);
+    // TODO: better error recovery here.
     return;
   }
   
-  if (Tok.getKind() == tok::identifier)
-    ConsumeToken();
+  // If an identifier is present, consume and remember it.
+  IdentifierInfo *Name = 0;
+  SourceLocation NameLoc;
+  if (Tok.getKind() == tok::identifier) {
+    Name = Tok.getIdentifierInfo();
+    NameLoc = ConsumeToken();
+  }
   
+  // There are three options here.  If we have 'struct foo;', then this is a
+  // forward declaration.  If we have 'struct foo {...' then this is a
+  // definition.  Otherwise we have something like 'struct foo xyz', a use.
+  DeclTy *TagDecl = Actions.ParseStructUnionTag(CurScope, isUnion, StartLoc,
+                                                Name, NameLoc);
+  // TODO: more with the tag decl.
   if (Tok.getKind() == tok::l_brace) {
     SourceLocation LBraceLoc = ConsumeBrace();