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//===--- UseEqualsDeleteCheck.cpp - clang-tidy-----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#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::storeOptions(ClangTidyOptions::OptionMap &Opts) {
Options.store(Opts, "IgnoreMacros", IgnoreMacros);
}
void UseEqualsDeleteCheck::registerMatchers(MatchFinder *Finder) {
if (!getLangOpts().CPlusPlus)
return;
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(),
ast_matchers::isTemplateInstantiation(),
// 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->getEndLoc(), 0, *Result.SourceManager, getLangOpts());
if (Func->getLocation().isMacroID() && IgnoreMacros)
return;
// FIXME: Improve FixItHint to make the 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)) {
// Ignore this warning in macros, since it's extremely noisy in code using
// DISALLOW_COPY_AND_ASSIGN-style macros and there's no easy way to
// automatically fix the warning when macros are in play.
if (Func->getLocation().isMacroID() && IgnoreMacros)
return;
// FIXME: Add FixItHint to make the method public.
diag(Func->getLocation(), "deleted member function should be public");
}
}
} // namespace modernize
} // namespace tidy
} // namespace clang
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