[CodeCompletion] Complete platform names in @available expressions

rdar://32074504


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@302545 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/Parse/ParseExpr.cpp b/lib/Parse/ParseExpr.cpp
index 77316b9ad1..38c1b2676d 100644
--- a/lib/Parse/ParseExpr.cpp
+++ b/lib/Parse/ParseExpr.cpp
@@ -2989,6 +2989,11 @@ Optional<AvailabilitySpec> Parser::ParseAvailabilitySpec() {
     return AvailabilitySpec(ConsumeToken());
   } else {
     // Parse the platform name.
+    if (Tok.is(tok::code_completion)) {
+      Actions.CodeCompleteAvailabilityPlatformName();
+      cutOffParsing();
+      return None;
+    }
     if (Tok.isNot(tok::identifier)) {
       Diag(Tok, diag::err_avail_query_expected_platform_name);
       return None;