forked from OSchip/llvm-project
48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
//===--- UnusedRAII.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_MISC_UNUSED_RAII_H
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#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_RAII_H
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#include "../ClangTidy.h"
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namespace clang {
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namespace tidy {
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/// \brief Finds temporaries that look like RAII objects.
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///
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/// The canonical example for this is a scoped lock.
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/// \code
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/// {
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/// scoped_lock(&global_mutex);
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/// critical_section();
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/// }
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/// \endcode
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/// The destructor of the scoped_lock is called before the critical_section is
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/// entered, leaving it unprotected.
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///
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/// We apply a number of heuristics to reduce the false positive count of this
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/// check:
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/// - Ignore code expanded from macros. Testing frameworks make heavy use of
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/// this.
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/// - Ignore types with no user-declared constructor. Those are very unlikely
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/// to be RAII objects.
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/// - Ignore objects at the end of a compound statement (doesn't change behavior).
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/// - Ignore objects returned from a call.
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class UnusedRAIICheck : public ClangTidyCheck {
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public:
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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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};
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} // namespace tidy
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} // namespace clang
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#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_RAII_H
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