r216490 - Clarify comment so this doesn't appear to be a C11-only rule.

[Richard Smith]

Author: rsmith
Date: Tue Aug 26 16:51:57 2014
New Revision: 216490

URL: http://llvm.org/viewvc/llvm-project?rev=216490&view=rev
Log:
Clarify comment so this doesn't appear to be a C11-only rule.

Modified:
    cfe/trunk/lib/Sema/SemaDecl.cpp

Modified: cfe/trunk/lib/Sema/SemaDecl.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=216490&r1=216489&r2=216490&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDecl.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDecl.cpp Tue Aug 26 16:51:57 2014
@@ -3450,6 +3450,9 @@ Decl *Sema::ParsedFreeStandingDeclSpec(S
   // C11 6.7.2.1p2:
   //   A struct-declaration that does not declare an anonymous structure or
   //   anonymous union shall contain a struct-declarator-list.
+  //
+  // This rule also existed in C89 and C99; the grammar for struct-declaration
+  // did not permit a struct-declaration without a struct-declarator-list.
   if (!getLangOpts().CPlusPlus && CurContext->isRecord() &&
       DS.getStorageClassSpec() == DeclSpec::SCS_unspecified) {
     // Check for Microsoft C extension: anonymous struct/union member.