[ObjC] Implement @available in the Parser and AST
This patch adds a new AST node: ObjCAvailabilityCheckExpr, and teaches the
Parser and Sema to generate it. This node represents an availability check of
the form:
@available(macos 10.10, *);
Which will eventually compile to a runtime check of the host's OS version. This
is the first patch of the feature I proposed here:
http://lists.llvm.org/pipermail/cfe-dev/2016-July/049851.html
Differential Revision: https://reviews.llvm.org/D22171
llvm-svn: 275654
diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index 5ce6e5e..0a39413 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -1632,6 +1632,11 @@
ID.AddBoolean(S->getBridgeKind());
}
+void StmtProfiler::VisitObjCAvailabilityCheckExpr(
+ const ObjCAvailabilityCheckExpr *S) {
+ VisitExpr(S);
+}
+
void StmtProfiler::VisitDecl(const Decl *D) {
ID.AddInteger(D? D->getKind() : 0);