clang-tidy/bugprone/FoldInitTypeCheck.h

0001 //===--- FoldInitTypeCheck.h - clang-tidy------------------------*- C++ -*-===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FOLD_INIT_TYPE_H
0010 #define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FOLD_INIT_TYPE_H
0011
0012 #include "../ClangTidyCheck.h"
0013
0014 namespace clang::tidy::bugprone {
0015
0016 /// Find and flag invalid initializer values in folds, e.g. std::accumulate.
0017 /// Example:
0018 /// \code
0019 ///   auto v = {65536L * 65536 * 65536};
0020 ///   std::accumulate(begin(v), end(v), 0 /* int type is too small */);
0021 /// \endcode
0022 ///
0023 /// For the user-facing documentation see:
0024 /// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/fold-init-type.html
0025 class FoldInitTypeCheck : public ClangTidyCheck {
0026 public:
0027   FoldInitTypeCheck(StringRef Name, ClangTidyContext *Context)
0028       : ClangTidyCheck(Name, Context) {}
0029   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
0030   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
0031
0032 private:
0033   void doCheck(const BuiltinType &IterValueType, const BuiltinType &InitType,
0034                const ASTContext &Context, const CallExpr &CallNode);
0035 };
0036
0037 } // namespace clang::tidy::bugprone
0038
0039 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_FOLD_INIT_TYPE_H