50 lines
1.9 KiB
C++
50 lines
1.9 KiB
C++
//===--- ForRangeCopyCheck.h - clang-tidy------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_FORRANGECOPYCHECK_H
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#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_FORRANGECOPYCHECK_H
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#include "../ClangTidy.h"
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namespace clang {
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namespace tidy {
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namespace performance {
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/// A check that detects copied loop variables and suggests using const
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/// references.
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/// For the user-facing documentation see:
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/// http://clang.llvm.org/extra/clang-tidy/checks/performance-for-range-copy.html
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class ForRangeCopyCheck : public ClangTidyCheck {
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public:
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ForRangeCopyCheck(StringRef Name, ClangTidyContext *Context);
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void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
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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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private:
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// Checks if the loop variable is a const value and expensive to copy. If so
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// suggests it be converted to a const reference.
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bool handleConstValueCopy(const VarDecl &LoopVar, ASTContext &Context);
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// Checks if the loop variable is a non-const value and whether only
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// const methods are invoked on it or whether it is only used as a const
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// reference argument. If so it suggests it be made a const reference.
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bool handleCopyIsOnlyConstReferenced(const VarDecl &LoopVar,
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const CXXForRangeStmt &ForRange,
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ASTContext &Context);
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const bool WarnOnAllAutoCopies;
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};
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} // namespace performance
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} // namespace tidy
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} // namespace clang
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#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_PERFORMANCE_FORRANGECOPYCHECK_H
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