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  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_ANALYSIS_SELECTOREXTRAS_H
  10. #define LLVM_CLANG_ANALYSIS_SELECTOREXTRAS_H
  11.  
  12. #include "clang/AST/ASTContext.h"
  13.  
  14. namespace clang {
  15.  
  16. template <typename... IdentifierInfos>
  17. static inline Selector getKeywordSelector(ASTContext &Ctx,
  18.                                           IdentifierInfos *... IIs) {
  19.   static_assert(sizeof...(IdentifierInfos) > 0,
  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.  
  26. template <typename... IdentifierInfos>
  27. static 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.