clang-tools 19.0.0git
TooSmallLoopVariableCheck.h
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1//===--- TooSmallLoopVariableCheck.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_TOOSMALLLOOPVARIABLECHECK_H
10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_TOOSMALLLOOPVARIABLECHECK_H
11
12#include "../ClangTidyCheck.h"
13
14namespace clang::tidy::bugprone {
15
16/// This check gives a warning if a loop variable has a too small type which
17/// might not be able to represent all values which are part of the whole range
18/// in which the loop iterates.
19/// If the loop variable's type is too small we might end up in an infinite
20/// loop. Example:
21/// \code
22/// long size = 294967296l;
23/// for (short i = 0; i < size; ++i) {} { ... }
24/// \endcode
25///
26/// For the user-facing documentation see:
27/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone/too-small-loop-variable.html
29public:
31
32 void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
33 void registerMatchers(ast_matchers::MatchFinder *Finder) override;
34 void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
35
36private:
37 const unsigned MagnitudeBitsUpperLimit;
38};
39
40} // namespace clang::tidy::bugprone
41
42#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_TOOSMALLLOOPVARIABLECHECK_H
llvm::SmallString< 256U > Name
Base class for all clang-tidy checks.
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
This check gives a warning if a loop variable has a too small type which might not be able to represe...
void registerMatchers(ast_matchers::MatchFinder *Finder) override
The matcher for loops with suspicious integer loop variable.
void storeOptions(ClangTidyOptions::OptionMap &Opts) override
Should store all options supported by this check with their current values or default values for opti...
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
llvm::StringMap< ClangTidyValue > OptionMap