1 //=== SelectorExtras.h - Helpers for checkers using selectors -----*- C++ -*-=//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #ifndef LLVM_CLANG_LIB_ANALYSIS_SELECTOREXTRAS_H
11 #define LLVM_CLANG_LIB_ANALYSIS_SELECTOREXTRAS_H
12
13 #include "clang/AST/ASTContext.h"
14
15 namespace clang {
16
17 template <typename... IdentifierInfos>
getKeywordSelector(ASTContext & Ctx,IdentifierInfos * ...IIs)18 static inline Selector getKeywordSelector(ASTContext &Ctx,
19 IdentifierInfos *... IIs) {
20 static_assert(sizeof...(IdentifierInfos),
21 "keyword selectors must have at least one argument");
22 SmallVector<IdentifierInfo *, 10> II({&Ctx.Idents.get(IIs)...});
23
24 return Ctx.Selectors.getSelector(II.size(), &II[0]);
25 }
26
27 template <typename... IdentifierInfos>
lazyInitKeywordSelector(Selector & Sel,ASTContext & Ctx,IdentifierInfos * ...IIs)28 static inline void lazyInitKeywordSelector(Selector &Sel, ASTContext &Ctx,
29 IdentifierInfos *... IIs) {
30 if (!Sel.isNull())
31 return;
32 Sel = getKeywordSelector(Ctx, IIs...);
33 }
34
35 } // end namespace clang
36
37 #endif
38