47 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "CastingThroughVoidCheck.h"10#include "clang/AST/Expr.h"11#include "clang/AST/Type.h"12#include "clang/ASTMatchers/ASTMatchFinder.h"13#include "clang/ASTMatchers/ASTMatchers.h"14 15using namespace clang::ast_matchers;16 17namespace clang::tidy::bugprone {18 19void CastingThroughVoidCheck::registerMatchers(MatchFinder *Finder) {20 Finder->addMatcher(21 explicitCastExpr(22 hasDestinationType(23 qualType(unless(hasCanonicalType(pointsTo(voidType()))))24 .bind("target_type")),25 hasSourceExpression(26 explicitCastExpr(27 hasSourceExpression(28 expr(hasType(qualType(unless(pointsTo(voidType())))29 .bind("source_type")))),30 hasDestinationType(31 qualType(pointsTo(voidType())).bind("void_type")))32 .bind("cast"))),33 this);34}35 36void CastingThroughVoidCheck::check(const MatchFinder::MatchResult &Result) {37 const auto TT = *Result.Nodes.getNodeAs<QualType>("target_type");38 const auto ST = *Result.Nodes.getNodeAs<QualType>("source_type");39 const auto VT = *Result.Nodes.getNodeAs<QualType>("void_type");40 const auto *CE = Result.Nodes.getNodeAs<ExplicitCastExpr>("cast");41 diag(CE->getExprLoc(),42 "do not cast %0 to %1 through %2; use reinterpret_cast instead")43 << ST << TT << VT;44}45 46} // namespace clang::tidy::bugprone47