46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
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//===--- CastingThroughVoidCheck.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 "CastingThroughVoidCheck.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Expr.h"
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#include "clang/AST/Type.h"
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#include "clang/ASTMatchers/ASTMatchFinder.h"
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#include "clang/ASTMatchers/ASTMatchers.h"
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#include "llvm/ADT/StringSet.h"
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using namespace clang::ast_matchers;
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namespace clang::tidy::bugprone {
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void CastingThroughVoidCheck::registerMatchers(MatchFinder *Finder) {
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Finder->addMatcher(
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explicitCastExpr(
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hasDestinationType(
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qualType(unless(hasCanonicalType(pointsTo(voidType()))))
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.bind("target_type")),
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hasSourceExpression(
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explicitCastExpr(
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hasSourceExpression(
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expr(hasType(qualType().bind("source_type")))),
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hasDestinationType(
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qualType(pointsTo(voidType())).bind("void_type")))
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.bind("cast"))),
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this);
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}
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void CastingThroughVoidCheck::check(const MatchFinder::MatchResult &Result) {
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const auto TT = *Result.Nodes.getNodeAs<QualType>("target_type");
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const auto ST = *Result.Nodes.getNodeAs<QualType>("source_type");
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const auto VT = *Result.Nodes.getNodeAs<QualType>("void_type");
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const auto *CE = Result.Nodes.getNodeAs<ExplicitCastExpr>("cast");
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diag(CE->getExprLoc(), "do not cast %0 to %1 through %2") << ST << TT << VT;
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}
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} // namespace clang::tidy::bugprone
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