47 lines
1.9 KiB
C
47 lines
1.9 KiB
C
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//===--- ContainerSizeEmptyCheck.h - clang-tidy -----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_CONTAINERSIZEEMPTYCHECK_H
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#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_CONTAINERSIZEEMPTYCHECK_H
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#include "../ClangTidyCheck.h"
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#include <vector>
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namespace clang::tidy::readability {
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/// Checks whether a call to the `size()`/`length()` method can be replaced with
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/// a call to `empty()`.
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///
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/// The emptiness of a container should be checked using the `empty()` method
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/// instead of the `size()` method. It is not guaranteed that `size()` is a
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/// constant-time function, and it is generally more efficient and also shows
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/// clearer intent to use `empty()`. Furthermore some containers may implement
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/// the `empty()` method but not implement the `size()` method. Using `empty()`
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/// whenever possible makes it easier to switch to another container in the
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/// future.
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class ContainerSizeEmptyCheck : public ClangTidyCheck {
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public:
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ContainerSizeEmptyCheck(StringRef Name, ClangTidyContext *Context);
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bool isLanguageVersionSupported(const LangOptions &LangOpts) const override {
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return LangOpts.CPlusPlus;
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}
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void registerMatchers(ast_matchers::MatchFinder *Finder) override;
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void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
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void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
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std::optional<TraversalKind> getCheckTraversalKind() const override {
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return TK_IgnoreUnlessSpelledInSource;
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}
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private:
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std::vector<llvm::StringRef> ExcludedComparisonTypes;
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};
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} // namespace clang::tidy::readability
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#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_CONTAINERSIZEEMPTYCHECK_H
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