clang-tools
15.0.0git
llvm-project
clang-tools-extra
clang-tidy
misc
UnusedUsingDeclsCheck.h
Go to the documentation of this file.
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//===--- UnusedUsingDeclsCheck.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_MISC_UNUSED_USING_DECLS_H
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#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MISC_UNUSED_USING_DECLS_H
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#include "../ClangTidyCheck.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include <vector>
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namespace
clang
{
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namespace
tidy {
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namespace
misc {
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/// Finds unused using declarations.
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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/misc-unused-using-decls.html
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class
UnusedUsingDeclsCheck
:
public
ClangTidyCheck
{
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public
:
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UnusedUsingDeclsCheck
(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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void
onEndOfTranslationUnit
()
override
;
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private
:
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void
removeFromFoundDecls(
const
Decl
*
D
);
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struct
UsingDeclContext {
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explicit
UsingDeclContext(
const
UsingDecl *FoundUsingDecl)
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: FoundUsingDecl(FoundUsingDecl),
IsUsed
(false) {}
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// A set saves all UsingShadowDecls introduced by a UsingDecl. A UsingDecl
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// can introduce multiple UsingShadowDecls in some cases (such as
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// overloaded functions).
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llvm::SmallPtrSet<const Decl *, 4> UsingTargetDecls;
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// The original UsingDecl.
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const
UsingDecl *FoundUsingDecl;
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// The source range of the UsingDecl.
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CharSourceRange UsingDeclRange;
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// Whether the UsingDecl is used.
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bool
IsUsed
;
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};
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std::vector<UsingDeclContext> Contexts;
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};
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}
// namespace misc
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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_USING_DECLS_H
clang::tidy::misc::UnusedUsingDeclsCheck::UnusedUsingDeclsCheck
UnusedUsingDeclsCheck(StringRef Name, ClangTidyContext *Context)
Definition:
UnusedUsingDeclsCheck.h:26
clang::tidy::misc::UnusedUsingDeclsCheck::registerMatchers
void registerMatchers(ast_matchers::MatchFinder *Finder) override
Override this to register AST matchers with Finder.
Definition:
UnusedUsingDeclsCheck.cpp:41
clang::tidy::misc::UnusedUsingDeclsCheck::onEndOfTranslationUnit
void onEndOfTranslationUnit() override
Definition:
UnusedUsingDeclsCheck.cpp:170
clang::tidy::ClangTidyCheck
Base class for all clang-tidy checks.
Definition:
ClangTidyCheck.h:53
ns1::ns2::D
@ D
Definition:
CategoricalFeature.h:3
Decl
const FunctionDecl * Decl
Definition:
AvoidBindCheck.cpp:100
clang::tidy::ClangTidyContext
Every ClangTidyCheck reports errors through a DiagnosticsEngine provided by this context.
Definition:
ClangTidyDiagnosticConsumer.h:66
Name
Token Name
Definition:
MacroToEnumCheck.cpp:89
IsUsed
bool IsUsed
Definition:
AvoidBindCheck.cpp:85
clang::tidy::misc::UnusedUsingDeclsCheck::check
void check(const ast_matchers::MatchFinder::MatchResult &Result) override
ClangTidyChecks that register ASTMatchers should do the actual work in here.
Definition:
UnusedUsingDeclsCheck.cpp:65
clang
===– Representation.cpp - ClangDoc Representation --------—*- C++ -*-===//
Definition:
ApplyReplacements.h:27
clang::tidy::misc::UnusedUsingDeclsCheck
Finds unused using declarations.
Definition:
UnusedUsingDeclsCheck.h:24
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