llvm-project/clang-tools-extra/clang-tidy/modernize/UseEqualsDeleteCheck.cpp

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//===--- UseEqualsDeleteCheck.cpp - clang-tidy-----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "UseEqualsDeleteCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Lex/Lexer.h"
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace modernize {
static const char SpecialFunction[] = "SpecialFunction";
static const char DeletedNotPublic[] = "DeletedNotPublic";
void UseEqualsDeleteCheck::registerMatchers(MatchFinder *Finder) {
auto PrivateSpecialFn = cxxMethodDecl(
isPrivate(),
anyOf(cxxConstructorDecl(anyOf(isDefaultConstructor(),
isCopyConstructor(), isMoveConstructor())),
cxxMethodDecl(
anyOf(isCopyAssignmentOperator(), isMoveAssignmentOperator())),
cxxDestructorDecl()));
Finder->addMatcher(
cxxMethodDecl(
PrivateSpecialFn,
unless(anyOf(hasBody(stmt()), isDefaulted(), isDeleted(),
// Ensure that all methods except private special member
// functions are defined.
hasParent(cxxRecordDecl(hasMethod(unless(
anyOf(PrivateSpecialFn, hasBody(stmt()), isPure(),
isDefaulted(), isDeleted()))))))))
.bind(SpecialFunction),
this);
Finder->addMatcher(
cxxMethodDecl(isDeleted(), unless(isPublic())).bind(DeletedNotPublic),
this);
}
void UseEqualsDeleteCheck::check(const MatchFinder::MatchResult &Result) {
if (const auto *Func =
Result.Nodes.getNodeAs<CXXMethodDecl>(SpecialFunction)) {
SourceLocation EndLoc = Lexer::getLocForEndOfToken(
Func->getLocEnd(), 0, *Result.SourceManager, getLangOpts());
// FIXME: Improve FixItHint to make method public
diag(Func->getLocation(),
"use '= delete' to prohibit calling of a special member function")
<< FixItHint::CreateInsertion(EndLoc, " = delete");
} else if (const auto *Func =
Result.Nodes.getNodeAs<CXXMethodDecl>(DeletedNotPublic)) {
// FIXME: Add FixItHint to make method public
diag(Func->getLocation(), "deleted member function should be public");
}
}
} // namespace modernize
} // namespace tidy
} // namespace clang