Clang Project

clang_source_code/include/clang/Analysis/SelectorExtras.h
1//=== SelectorExtras.h - Helpers for checkers using selectors -----*- C++ -*-=//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLVM_CLANG_LIB_ANALYSIS_SELECTOREXTRAS_H
10#define LLVM_CLANG_LIB_ANALYSIS_SELECTOREXTRAS_H
11
12#include "clang/AST/ASTContext.h"
13
14namespace clang {
15
16template <typename... IdentifierInfos>
17static inline Selector getKeywordSelector(ASTContext &Ctx,
18                                          IdentifierInfos *... IIs) {
19  static_assert(sizeof...(IdentifierInfos),
20                "keyword selectors must have at least one argument");
21  SmallVector<IdentifierInfo *, 10> II({&Ctx.Idents.get(IIs)...});
22
23  return Ctx.Selectors.getSelector(II.size(), &II[0]);
24}
25
26template <typename... IdentifierInfos>
27static inline void lazyInitKeywordSelector(Selector &Sel, ASTContext &Ctx,
28                                           IdentifierInfos *... IIs) {
29  if (!Sel.isNull())
30    return;
31  Sel = getKeywordSelector(Ctx, IIs...);
32}
33
34} // end namespace clang
35
36#endif
37
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