Allow the cf_returns_[not_]retained attributes to appear on out-parameters.

Includes a simple static analyzer check and not much else, but we'll also
be able to take advantage of this in Swift.

This feature can be tested for using __has_feature(cf_returns_on_parameters).

This commit also contains two fixes:
- Look through non-typedef sugar when deciding whether something is a CF type.
- When (cf|ns)_returns(_not)?_retained is applied to invalid properties,
  refer to "property" instead of "method" in the error message.

rdar://problem/18742441

llvm-svn: 240185

1 files changed, 1 insertions, 0 deletions

diff --git a/clang/lib/Lex/PPMacroExpansion.cpp b/clang/lib/Lex/PPMacroExpansion.cpp
index ad115bace99..5e0b283bd77 100644
--- a/clang/lib/Lex/PPMacroExpansion.cpp
+++ b/clang/lib/Lex/PPMacroExpansion.cpp
@@ -1059,6 +1059,7 @@ static bool HasFeature(const Preprocessor &PP, const IdentifierInfo *II) {
       .Case("attribute_availability_app_extension", true)
       .Case("attribute_cf_returns_not_retained", true)
       .Case("attribute_cf_returns_retained", true)
+      .Case("attribute_cf_returns_on_parameters", true)
       .Case("attribute_deprecated_with_message", true)
       .Case("attribute_ext_vector_type", true)
       .Case("attribute_ns_returns_not_retained", true)