80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
//===--- TriviallyDestructibleCheck.cpp - clang-tidy ----------------------===//
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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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#include "TriviallyDestructibleCheck.h"
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#include "../utils/LexerUtils.h"
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#include "../utils/Matchers.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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using namespace clang::ast_matchers;
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using namespace clang::ast_matchers::internal;
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using namespace clang::tidy::matchers;
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namespace clang {
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namespace tidy {
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namespace performance {
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namespace {
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AST_MATCHER(Decl, isFirstDecl) { return Node.isFirstDecl(); }
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AST_MATCHER_P(CXXRecordDecl, hasBase, Matcher<QualType>, InnerMatcher) {
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for (const CXXBaseSpecifier &BaseSpec : Node.bases()) {
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QualType BaseType = BaseSpec.getType();
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if (InnerMatcher.matches(BaseType, Finder, Builder))
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return true;
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}
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return false;
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}
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} // namespace
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void TriviallyDestructibleCheck::registerMatchers(MatchFinder *Finder) {
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Finder->addMatcher(
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cxxDestructorDecl(
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isDefaulted(),
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unless(anyOf(isFirstDecl(), isVirtual(),
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ofClass(cxxRecordDecl(
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anyOf(hasBase(unless(isTriviallyDestructible())),
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has(fieldDecl(unless(
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hasType(isTriviallyDestructible()))))))))))
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.bind("decl"),
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this);
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}
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void TriviallyDestructibleCheck::check(const MatchFinder::MatchResult &Result) {
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const auto *MatchedDecl = Result.Nodes.getNodeAs<CXXDestructorDecl>("decl");
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// Get locations of both first and out-of-line declarations.
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SourceManager &SM = *Result.SourceManager;
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const auto *FirstDecl = cast<CXXMethodDecl>(MatchedDecl->getFirstDecl());
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const SourceLocation FirstDeclEnd = utils::lexer::findNextTerminator(
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FirstDecl->getEndLoc(), SM, getLangOpts());
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const CharSourceRange SecondDeclRange = CharSourceRange::getTokenRange(
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MatchedDecl->getBeginLoc(),
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utils::lexer::findNextTerminator(MatchedDecl->getEndLoc(), SM,
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getLangOpts()));
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if (FirstDeclEnd.isInvalid() || SecondDeclRange.isInvalid())
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return;
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// Report diagnostic.
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diag(FirstDecl->getLocation(),
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"class %0 can be made trivially destructible by defaulting the "
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"destructor on its first declaration")
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<< FirstDecl->getParent()
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<< FixItHint::CreateInsertion(FirstDeclEnd, " = default")
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<< FixItHint::CreateRemoval(SecondDeclRange);
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diag(MatchedDecl->getLocation(), "destructor definition is here",
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DiagnosticIDs::Note);
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}
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} // namespace performance
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} // namespace tidy
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} // namespace clang
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