Allow Microsoft attributes in a constructor's parameter list.

This fixes a few compile errors when parsing <regex> from MSVC 2008 with clang.

llvm-svn: 124573

clang/lib/Parse/ParseDecl.cpp

@@ -2512,6 +2512,10 @@ bool Parser::isConstructorDeclarator() {
   if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(getCurScope(), SS))
     DeclScopeObj.EnterDeclaratorScope();
 
+  // Optionally skip Microsoft attributes.
+  ParsedAttributes Attrs;
+  MaybeParseMicrosoftAttributes(Attrs);
+
   // Check whether the next token(s) are part of a declaration
   // specifier, in which case we have the start of a parameter and,
   // therefore, we know that this is a constructor.

clang/test/Parser/MicrosoftExtensions.cpp

@@ -22,6 +22,14 @@ extern "C" {
   int foo5([SA_Post(attr=1)] void *param);
 }
 
+class class_attr {
+public:
+  class_attr([SA_Pre(Null=SA_No,NullTerminated=SA_Yes)]  int a)
+  {
+  }
+};
+
+
 
 void uuidof_test1()
 {