1 files changed, 37 insertions, 0 deletions
diff --git a/include/clang/Analysis/SelectorExtras.h b/include/clang/Analysis/SelectorExtras.h
new file mode 100644
index 0000000000000..767063e835e44
--- /dev/null
+++ b/include/clang/Analysis/SelectorExtras.h
@@ -0,0 +1,37 @@
+//=== SelectorExtras.h - Helpers for checkers using selectors -----*- C++ -*-=//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_ANALYSIS_SELECTOREXTRAS_H
+#define LLVM_CLANG_LIB_ANALYSIS_SELECTOREXTRAS_H
+
+#include "clang/AST/ASTContext.h"
+
+namespace clang {
+
+template <typename... IdentifierInfos>
+static inline Selector getKeywordSelector(ASTContext &Ctx,
+                                          IdentifierInfos *... IIs) {
+  static_assert(sizeof...(IdentifierInfos),
+                "keyword selectors must have at least one argument");
+  SmallVector<IdentifierInfo *, 10> II({&Ctx.Idents.get(IIs)...});
+
+  return Ctx.Selectors.getSelector(II.size(), &II[0]);
+}
+
+template <typename... IdentifierInfos>
+static inline void lazyInitKeywordSelector(Selector &Sel, ASTContext &Ctx,
+                                           IdentifierInfos *... IIs) {
+  if (!Sel.isNull())
+    return;
+  Sel = getKeywordSelector(Ctx, IIs...);
+}
+
+} // end namespace clang
+
+#endif