Implement the Microsoft __if_exists/if_not_exists extension in initializer-list.

Necessary to parse Microsoft ATL code.

Example: 
  int array[] = {
    0, 
    __if_exists(CLASS::Type) {2, }
    3
  };

will declare an array of 2 or 3 elements depending on if CLASS::Type exists or not.

llvm-svn: 146447

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/test/SemaTemplate/ms-if-exists.cpp b/clang/test/SemaTemplate/ms-if-exists.cpp
index 8ac4e2418cf..04f4a636236 100644
--- a/clang/test/SemaTemplate/ms-if-exists.cpp
+++ b/clang/test/SemaTemplate/ms-if-exists.cpp
@@ -47,6 +47,12 @@ void f(T t) {
     int *i = t; // expected-error{{no viable conversion from 'HasFoo' to 'int *'}}
     { }
   }
+
+  int array2[] = {

+    0, 

+    __if_exists(T::bar) {2, }// expected-warning{{dependent __if_exists declarations are ignored}}

+    3

+  };

 }
 
 template void f(HasFoo); // expected-note{{in instantiation of function template specialization 'f<HasFoo>' requested here}}