clang-tools-extra/clang-tidy/readability/ElseAfterReturnCheck.h

   1 //===--- ElseAfterReturnCheck.h - clang-tidy---------------------*- 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_TOOLS_EXTRA_CLANG_TIDY_READABILITY_ELSEAFTERRETURNCHECK_H
  10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_ELSEAFTERRETURNCHECK_H
  11
  12 #include "../ClangTidyCheck.h"
  13 #include "llvm/ADT/DenseMap.h"
  14
  15 namespace clang::tidy::readability {
  16
  17 /// Flags the usages of `else` after `return`.
  18 ///
  19 /// http://llvm.org/docs/CodingStandards.html#don-t-use-else-after-a-return
  20 class ElseAfterReturnCheck : public ClangTidyCheck {
  21 public:
  22   ElseAfterReturnCheck(StringRef Name, ClangTidyContext *Context);
  23
  24   void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
  25   void registerPPCallbacks(const SourceManager &SM, Preprocessor *PP,
  26                            Preprocessor *ModuleExpanderPP) override;
  27   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  28   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
  29   std::optional<TraversalKind> getCheckTraversalKind() const override {
  30     return TK_IgnoreUnlessSpelledInSource;
  31   }
  32
  33   using ConditionalBranchMap =
  34       llvm::DenseMap<FileID, SmallVector<SourceRange, 1>>;
  35
  36 private:
  37   const bool WarnOnUnfixable;
  38   const bool WarnOnConditionVariables;
  39   ConditionalBranchMap PPConditionals;
  40 };
  41
  42 } // namespace clang::tidy::readability
  43
  44 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_ELSEAFTERRETURNCHECK_H