clang-tools
10.0.0
clang-tools-extra
clang-tidy
bugprone
MoveForwardingReferenceCheck.h
Go to the documentation of this file.
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//===--- MoveForwardingReferenceCheck.h - clang-tidy ----------------------===//
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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_BUGPRONE_MOVEFORWARDINGREFERENCECHECK_H
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#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_MOVEFORWARDINGREFERENCECHECK_H
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#include "../ClangTidyCheck.h"
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namespace
clang
{
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namespace
tidy {
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namespace
bugprone {
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/// The check warns if std::move is applied to a forwarding reference (i.e. an
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/// rvalue reference of a function template argument type).
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///
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/// If a developer is unaware of the special rules for template argument
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/// deduction on forwarding references, it will seem reasonable to apply
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/// std::move to the forwarding reference, in the same way that this would be
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/// done for a "normal" rvalue reference.
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///
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/// This has a consequence that is usually unwanted and possibly surprising: if
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/// the function that takes the forwarding reference as its parameter is called
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/// with an lvalue, that lvalue will be moved from (and hence placed into an
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/// indeterminate state) even though no std::move was applied to the lvalue at
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/// the call site.
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//
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/// The check suggests replacing the std::move with a std::forward.
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///
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/// For the user-facing documentation see:
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/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone-move-forwarding-reference.html
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class
MoveForwardingReferenceCheck
:
public
ClangTidyCheck
{
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public
:
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MoveForwardingReferenceCheck
(StringRef
Name
,
ClangTidyContext
*Context)
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:
ClangTidyCheck
(Name, Context) {}
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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 bugprone
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}
// namespace tidy
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}
// namespace clang
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#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_MOVEFORWARDINGREFERENCECHECK_H
clang::tidy::bugprone::MoveForwardingReferenceCheck::check
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
Definition:
MoveForwardingReferenceCheck.cpp:95
clang::tidy::ClangTidyCheck
Base class for all clang-tidy checks.
Definition:
ClangTidyCheck.h:47
clang::tidy::bugprone::MoveForwardingReferenceCheck::MoveForwardingReferenceCheck
MoveForwardingReferenceCheck(StringRef Name, ClangTidyContext *Context)
Definition:
MoveForwardingReferenceCheck.h:38
clang::tidy::bugprone::MoveForwardingReferenceCheck
The check warns if std::move is applied to a forwarding reference (i.e.
Definition:
MoveForwardingReferenceCheck.h:36
clang::tidy::bugprone::MoveForwardingReferenceCheck::registerMatchers
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
Definition:
MoveForwardingReferenceCheck.cpp:69
Name
static constexpr llvm::StringLiteral Name
Definition:
UppercaseLiteralSuffixCheck.cpp:27
clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Definition:
ApplyReplacements.h:27
clang::tidy::ClangTidyContext
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
Definition:
ClangTidyDiagnosticConsumer.h:77
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