clang-tools-extra/clang-tidy/bugprone/FoldInitTypeCheck.h

   1 //===--- FoldInitTypeCheck.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_BUGPRONE_FOLD_INIT_TYPE_H
  10 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FOLD_INIT_TYPE_H
  11
  12 #include "../ClangTidyCheck.h"
  13
  14 namespace clang::tidy::bugprone {
  15
  16 /// Find and flag invalid initializer values in folds, e.g. std::accumulate.
  17 /// Example:
  18 /// \code
  19 ///   auto v = {65536L * 65536 * 65536};
  20 ///   std::accumulate(begin(v), end(v), 0 /* int type is too small */);
  21 /// \endcode
  22 ///
  23 /// For the user-facing documentation see:
  24 /// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/fold-init-type.html
  25 class FoldInitTypeCheck : public ClangTidyCheck {
  26 public:
  27   FoldInitTypeCheck(StringRef Name, ClangTidyContext *Context)
  28       : ClangTidyCheck(Name, Context) {}
  29   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
  30   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
  31
  32 private:
  33   void doCheck(const BuiltinType &IterValueType, const BuiltinType &InitType,
  34                const ASTContext &Context, const CallExpr &CallNode);
  35 };
  36
  37 } // namespace clang::tidy::bugprone
  38
  39 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FOLD_INIT_TYPE_H