Support Swift in platform availability attribute

Summary: This adds support for Swift platform availability attributes. It's largely a port of the changes made to https://github.com/apple/swift-clang/ for Swift availability attributes. Specifically, https://github.com/apple/swift-clang/commit/84b5a21c31cb5b0d7d958a478bc01964939b6952 and https://github.com/apple/swift-clang/commit/e5b87f265aede41c8381094bbf54e2715c8293b0 . The implementation of attribute_availability_swift is a little different and additional tests in test/Index/availability.c were added.

Reviewers: manmanren, friss, doug.gregor, arphaman, jfb, erik.pilkington, aaron.ballman

Reviewed By: aaron.ballman

Subscribers: aaron.ballman, ColinKinloch, jrmuizel, cfe-commits

Differential Revision: https://reviews.llvm.org/D50318

llvm-svn: 346633

1 files changed, 15 insertions, 0 deletions

diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index af6214c..bff9179 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -1001,6 +1001,21 @@ void Parser::ParseAvailabilityAttribute(IdentifierInfo &Availability,
       continue;
     }
 
+    if (Keyword == Ident_deprecated && Platform->Ident &&
+        Platform->Ident->isStr("swift")) {
+      // For swift, we deprecate for all versions.
+      if (Changes[Deprecated].KeywordLoc.isValid()) {
+        Diag(KeywordLoc, diag::err_availability_redundant)
+          << Keyword
+          << SourceRange(Changes[Deprecated].KeywordLoc);
+      }
+
+      Changes[Deprecated].KeywordLoc = KeywordLoc;
+      // Use a fake version here.
+      Changes[Deprecated].Version = VersionTuple(1);
+      continue;
+    }
+
     if (Tok.isNot(tok::equal)) {
       Diag(Tok, diag::err_expected_after) << Keyword << tok::equal;
       SkipUntil(tok::r_paren, StopAtSemi);