llvm-project/clang-tools-extra/clang-tidy/readability/RedundantMemberInitCheck.cpp

69 lines
2.3 KiB
C++

//===--- RedundantMemberInitCheck.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 "RedundantMemberInitCheck.h"
#include "../utils/Matchers.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Lex/Lexer.h"
#include <algorithm>
using namespace clang::ast_matchers;
using namespace clang::tidy::matchers;
namespace clang {
namespace tidy {
namespace readability {
void RedundantMemberInitCheck::registerMatchers(MatchFinder *Finder) {
if (!getLangOpts().CPlusPlus)
return;
auto Construct =
cxxConstructExpr(
hasDeclaration(cxxConstructorDecl(hasParent(
cxxRecordDecl(unless(isTriviallyDefaultConstructible()))))))
.bind("construct");
Finder->addMatcher(
cxxConstructorDecl(
unless(isDelegatingConstructor()),
ofClass(unless(
anyOf(isUnion(), ast_matchers::isTemplateInstantiation()))),
forEachConstructorInitializer(
cxxCtorInitializer(isWritten(),
withInitializer(ignoringImplicit(Construct)),
unless(forField(hasType(isConstQualified()))))
.bind("init"))),
this);
}
void RedundantMemberInitCheck::check(const MatchFinder::MatchResult &Result) {
const auto *Init = Result.Nodes.getNodeAs<CXXCtorInitializer>("init");
const auto *Construct = Result.Nodes.getNodeAs<CXXConstructExpr>("construct");
if (Construct->getNumArgs() == 0 ||
Construct->getArg(0)->isDefaultArgument()) {
if (Init->isAnyMemberInitializer()) {
diag(Init->getSourceLocation(), "initializer for member %0 is redundant")
<< Init->getMember()
<< FixItHint::CreateRemoval(Init->getSourceRange());
} else {
diag(Init->getSourceLocation(),
"initializer for base class %0 is redundant")
<< Construct->getType()
<< FixItHint::CreateRemoval(Init->getSourceRange());
}
}
}
} // namespace readability
} // namespace tidy
} // namespace clang