clang-tools
11.0.0
clang-tools-extra
clang-tidy
bugprone
MoveForwardingReferenceCheck.h
Go to the documentation of this file.
1
//===--- MoveForwardingReferenceCheck.h - clang-tidy ----------------------===//
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_MOVEFORWARDINGREFERENCECHECK_H
10
#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_MOVEFORWARDINGREFERENCECHECK_H
11
12
#include "../ClangTidyCheck.h"
13
14
namespace
clang
{
15
namespace
tidy {
16
namespace
bugprone {
17
18
/// The check warns if std::move is applied to a forwarding reference (i.e. an
19
/// rvalue reference of a function template argument type).
20
///
21
/// If a developer is unaware of the special rules for template argument
22
/// deduction on forwarding references, it will seem reasonable to apply
23
/// std::move to the forwarding reference, in the same way that this would be
24
/// done for a "normal" rvalue reference.
25
///
26
/// This has a consequence that is usually unwanted and possibly surprising: if
27
/// the function that takes the forwarding reference as its parameter is called
28
/// with an lvalue, that lvalue will be moved from (and hence placed into an
29
/// indeterminate state) even though no std::move was applied to the lvalue at
30
/// the call site.
31
//
32
/// The check suggests replacing the std::move with a std::forward.
33
///
34
/// For the user-facing documentation see:
35
/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone-move-forwarding-reference.html
36
class
MoveForwardingReferenceCheck
:
public
ClangTidyCheck
{
37
public
:
38
MoveForwardingReferenceCheck
(StringRef
Name
,
ClangTidyContext
*Context)
39
:
ClangTidyCheck
(
Name
, Context) {}
40
bool
isLanguageVersionSupported
(
const
LangOptions &LangOpts)
const override
{
41
return
LangOpts.CPlusPlus11;
42
}
43
void
registerMatchers
(ast_matchers::MatchFinder *Finder)
override
;
44
void
check
(
const
ast_matchers::MatchFinder::MatchResult &Result)
override
;
45
};
46
47
}
// namespace bugprone
48
}
// namespace tidy
49
}
// namespace clang
50
51
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_MOVEFORWARDINGREFERENCECHECK_H
clang::tidy::bugprone::MoveForwardingReferenceCheck
The check warns if std::move is applied to a forwarding reference (i.e.
Definition:
MoveForwardingReferenceCheck.h:36
clang::tidy::ClangTidyCheck
Base class for all clang-tidy checks.
Definition:
ClangTidyCheck.h:114
clang::tidy::ClangTidyContext
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
Definition:
ClangTidyDiagnosticConsumer.h:76
Name
static constexpr llvm::StringLiteral Name
Definition:
UppercaseLiteralSuffixCheck.cpp:27
clang::tidy::bugprone::MoveForwardingReferenceCheck::registerMatchers
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
Definition:
MoveForwardingReferenceCheck.cpp:69
clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Definition:
ApplyReplacements.h:27
clang::tidy::bugprone::MoveForwardingReferenceCheck::isLanguageVersionSupported
bool isLanguageVersionSupported(const LangOptions &LangOpts) const override
Override this to disable registering matchers and PP callbacks if an invalid language version is bein...
Definition:
MoveForwardingReferenceCheck.h:40
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:92
clang::tidy::bugprone::MoveForwardingReferenceCheck::MoveForwardingReferenceCheck
MoveForwardingReferenceCheck(StringRef Name, ClangTidyContext *Context)
Definition:
MoveForwardingReferenceCheck.h:38
Generated on Tue Jul 28 2020 16:14:02 for clang-tools by
1.8.16