Quelle constmethod.cxx Sprache: C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/

#include <algorithm>
#include <string>
#include <unordered_set>
#include <unordered_map>
#include <iostream>

#include "config_clang.h"

#include "plugin.hxx"
#include "check.hxx"
#include "functionaddress.hxx"

#include "clang/AST/ParentMapContext.h"

/**
   Find methods that can be declared const.

   This analysis attempts to implement "logical const" as opposed to "technical const", which means
   we ignore always-const nature of std::unique_ptr::operator->

   This is not a sophisticated analysis. It deliberately skips all of the hard cases for now.
   It is an exercise in getting the most benefit for the least effort.
*/
namespace
{

class ConstMethod:
    public loplugin::FunctionAddress<loplugin::FilteringPlugin<ConstMethod>>
{
public:
    explicit ConstMethod(loplugin::InstantiationData const & data): FunctionAddress(data) {}

    virtual void run() override {
        std::string fn(handler.getMainFileName());
        loplugin::normalizeDotDotInFilePath(fn);
        // things I'm not sure about
        if (loplugin::hasPathnamePrefix(fn, SRCDIR "/svl/unx/source/svdde/ddedummy.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/svl/source/numbers/zformat.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/svl/source/numbers/zforscan.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/svl/source/numbers/zforlist.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/source/gdi/impgraph.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/source/image/ImplImage.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/source/filter/wmf/wmfwr.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/unx/generic/app/i18n_im.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/unx/generic/app/randrwrapper.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/unx/gtk3/gtkinst.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/unx/gtk3/gtkframe.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/skia/gdiimpl.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/qt5/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/package/source/xstor/owriteablestream.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/package/source/zippackage/ZipPackage.cxx")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/toolkit/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/canvas/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/accessibility/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/framework/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/basic/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/sfx2/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/xmloff/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/connectivity/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/editeng/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/scripting/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/ucb/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/svx/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/basctl/")
            || loplugin::hasPathnamePrefix(fn, SRCDIR "/chart2/")
            )
            return;

        TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());

        for (const CXXMethodDecl *pMethodDecl : interestingMethodSet) {
            if (methodCannotBeConstSet.find(pMethodDecl) != methodCannotBeConstSet.end())
                continue;
            auto canonicalDecl = pMethodDecl->getCanonicalDecl();
            if (getFunctionsWithAddressTaken().find((FunctionDecl const *)canonicalDecl)
                    != getFunctionsWithAddressTaken().end())
                continue;
            // things that I don't think should be logically const
            std::string fqn = pMethodDecl->getQualifiedNameAsString();
            if (fqn == "comphelper::EmbeddedObjectContainer::CommitImageSubStorage"
                || fqn == "SvtLinguConfig::SetProperty"
                || fqn == "SvtLinguConfig::ReplaceSetProperties"
                || fqn == "SystemWindow::UpdatePositionData"
                || fqn == "OutputDevice::SelectClipRegion"
                || fqn == "OutputDevice::BlendBitmap")
                continue;
            StringRef aFileName = getFilenameOfLocation(compiler.getSourceManager().getSpellingLoc(canonicalDecl->getBeginLoc()));
            // leave the kit API alone
            if (loplugin::isSamePathname(aFileName, SRCDIR "/include/LibreOfficeKit/LibreOfficeKit.hxx"))
                continue;
            // don't feel like touching this right now
            if (loplugin::isSamePathname(aFileName, SRCDIR "/include/vcl/weld.hxx"))
                continue;
            report(
                DiagnosticsEngine::Warning,
                "this method can be const",
                pMethodDecl->getBeginLoc())
                << pMethodDecl->getSourceRange();
            if (canonicalDecl->getLocation() != pMethodDecl->getLocation()) {
                report(
                    DiagnosticsEngine::Note,
                    "canonical method declaration here",
                    canonicalDecl->getBeginLoc())
                    << canonicalDecl->getSourceRange();
            }
        }
    }

    bool TraverseCXXMethodDecl(CXXMethodDecl *);
    bool TraverseCXXConversionDecl(CXXConversionDecl *);
    bool VisitCXXMethodDecl(const CXXMethodDecl *);
    bool VisitCXXThisExpr(const CXXThisExpr *);

private:
    bool isPointerOrReferenceToConst(const QualType& qt);
    bool isPointerOrReferenceToNonConst(const QualType& qt);
    bool checkIfCanBeConst(const Stmt*, const CXXMethodDecl*);

    std::unordered_set<const CXXMethodDecl*> interestingMethodSet;
    std::unordered_set<const CXXMethodDecl*> methodCannotBeConstSet;
    CXXMethodDecl const * currCXXMethodDecl;
};

bool ConstMethod::TraverseCXXMethodDecl(CXXMethodDecl * cxxMethodDecl)
{
    currCXXMethodDecl = cxxMethodDecl;
    bool rv = RecursiveASTVisitor<ConstMethod>::TraverseCXXMethodDecl(cxxMethodDecl);
    currCXXMethodDecl = nullptr;
    return rv;
}

bool ConstMethod::TraverseCXXConversionDecl(CXXConversionDecl * cxxConversionDecl)
{
    currCXXMethodDecl = cxxConversionDecl;
    bool rv = RecursiveASTVisitor<ConstMethod>::TraverseCXXConversionDecl(cxxConversionDecl);
    currCXXMethodDecl = nullptr;
    return rv;
}

bool ConstMethod::VisitCXXMethodDecl(const CXXMethodDecl * cxxMethodDecl)
{
    if (ignoreLocation(cxxMethodDecl) || !cxxMethodDecl->isThisDeclarationADefinition()) {
        return true;
    }
    if (cxxMethodDecl->isConst())
        return true;
    // ignore stuff that forms part of the stable URE interface
    if (isInUnoIncludeFile(cxxMethodDecl)) {
        return true;
    }
    // TODO ignore template stuff for now
    if (cxxMethodDecl->getTemplatedKind() != FunctionDecl::TK_NonTemplate) {
        return true;
    }
    if (cxxMethodDecl->isDeleted())
        return true;
    if (cxxMethodDecl->isStatic())
        return true;
    if (cxxMethodDecl->isOverloadedOperator())
        return true;
    if (isa<CXXConstructorDecl>(cxxMethodDecl))
        return true;
    if (isa<CXXDestructorDecl>(cxxMethodDecl))
        return true;
    if (cxxMethodDecl->getParent()->getDescribedClassTemplate() != nullptr ) {
        return true;
    }
    // ignore virtual methods
    if (cxxMethodDecl->isVirtual() ) {
        return true;
    }
    // ignore macro expansions so we can ignore the IMPL_LINK macros from include/tools/link.hxx
    // TODO make this more precise
    if (cxxMethodDecl->getLocation().isMacroID())
        return true;

    if (!cxxMethodDecl->getIdentifier())
        return true;
//    if (cxxMethodDecl->getNumParams() > 0)
//        return true;
    // returning pointers or refs to non-const stuff, and then having the whole method
    // be const doesn't seem like a good idea
    auto tc = loplugin::TypeCheck(cxxMethodDecl->getReturnType());
    if (tc.Pointer().NonConst())
        return true;
    if (tc.LvalueReference().NonConst())
        return true;
    // a Get method that returns void is probably doing something that has side-effects
    if (tc.Void())
        return true;

//    StringRef name = cxxMethodDecl->getName();
//    if (!name.startswith("get") && !name.startswith("Get")
//        && !name.startswith("is") && !name.startswith("Is")
//        && !name.startswith("has") && !name.startswith("Has"))
//        return true;

    // something lacking in my analysis here
    if (loplugin::DeclCheck(cxxMethodDecl).Function("GetDescr").Class("SwRangeRedline").GlobalNamespace())
        return true;

    interestingMethodSet.insert(cxxMethodDecl);

    return true;
}

bool ConstMethod::VisitCXXThisExpr( const CXXThisExpr* cxxThisExpr )
{
    if (!currCXXMethodDecl)
        return true;
    if (ignoreLocation(cxxThisExpr))
        return true;
    // ignore stuff that forms part of the stable URE interface
    if (isInUnoIncludeFile(cxxThisExpr->getBeginLoc()))
        return true;
    if (interestingMethodSet.find(currCXXMethodDecl) == interestingMethodSet.end())
        return true;
    // no need to check again if we have already eliminated this one
    if (methodCannotBeConstSet.find(currCXXMethodDecl) != methodCannotBeConstSet.end())
        return true;
    if (!checkIfCanBeConst(cxxThisExpr, currCXXMethodDecl))
        methodCannotBeConstSet.insert(currCXXMethodDecl);

    return true;
}

// Walk up from a statement that contains a CXXThisExpr, checking if the usage means that the
// related CXXMethodDecl can be const.
bool ConstMethod::checkIfCanBeConst(const Stmt* stmt, const CXXMethodDecl* cxxMethodDecl)
{
    const Stmt* parent = getParentStmt( stmt );
    if (!parent) {
        auto parentsRange = compiler.getASTContext().getParents(*stmt);
        if ( parentsRange.begin() == parentsRange.end())
            return true;
        auto varDecl = dyn_cast_or_null<VarDecl>(parentsRange.begin()->get<Decl>());
        if (!varDecl)
        {
            report(
                 DiagnosticsEngine::Warning,
                 "no parent?",
                  stmt->getBeginLoc())
                  << stmt->getSourceRange();
            return false;
        }
        return varDecl->getType()->isIntegralOrEnumerationType()
            || loplugin::TypeCheck(varDecl->getType()).Pointer().Const()
            || loplugin::TypeCheck(varDecl->getType()).LvalueReference().Const();
    }

    if (auto unaryOperator = dyn_cast<UnaryOperator>(parent)) {
        UnaryOperator::Opcode op = unaryOperator->getOpcode();
        if (op == UO_PreInc || op == UO_PostInc
            || op == UO_PreDec || op == UO_PostDec) {
            return false;
        }
        if (op == UO_Deref || op == UO_AddrOf) {
            return checkIfCanBeConst(parent, cxxMethodDecl);
        }
        return true;
    } else if (auto binaryOp = dyn_cast<BinaryOperator>(parent)) {
        BinaryOperator::Opcode op = binaryOp->getOpcode();
        if (binaryOp->getRHS() == stmt) {
            return true;
        }
        if (op == BO_Assign || op == BO_PtrMemD || op == BO_PtrMemI || op == BO_MulAssign
            || op == BO_DivAssign || op == BO_RemAssign || op == BO_AddAssign
            || op == BO_SubAssign || op == BO_ShlAssign || op == BO_ShrAssign
            || op == BO_AndAssign || op == BO_XorAssign || op == BO_OrAssign) {
            return false;
        }
//        // for pointer arithmetic need to check parent
//        if (binaryOp->getType()->isPointerType()) {
//            return checkIfCanBeConst(parent, cxxMethodDecl);
//        }
        return true;
    } else if (auto constructExpr = dyn_cast<CXXConstructExpr>(parent)) {
        const CXXConstructorDecl * constructorDecl = constructExpr->getConstructor();
        for (unsigned i = 0; i < constructExpr->getNumArgs(); ++i) {
            if (constructExpr->getArg(i) == stmt) {
                return isPointerOrReferenceToConst(constructorDecl->getParamDecl(i)->getType());
            }
        }
        return false; // TODO ??
    } else if (auto operatorCallExpr = dyn_cast<CXXOperatorCallExpr>(parent)) {
        const CXXMethodDecl* calleeMethodDecl = dyn_cast_or_null<CXXMethodDecl>(operatorCallExpr->getDirectCallee());
        if (calleeMethodDecl) {
            // unary operator
            if (calleeMethodDecl->getNumParams() == 0) {
                // some classes like std::unique_ptr do not do a very good job with their operator-> which is always const
                if (operatorCallExpr->getOperator() == OO_Arrow || operatorCallExpr->getOperator() == OO_Star) {
                    return checkIfCanBeConst(parent, cxxMethodDecl);
                }
                return calleeMethodDecl->isConst();
            }
            // some classes like std::unique_ptr do not do a very good job with their operator[] which is always const
            if (calleeMethodDecl->getNumParams() == 1 && operatorCallExpr->getArg(0) == stmt) {
                if (operatorCallExpr->getOperator() == OO_Subscript) {
                    return false;
                }
            }
            // binary operator
            if (operatorCallExpr->getArg(0) == stmt) {
                return calleeMethodDecl->isConst();
            }
            unsigned const n = std::min(
                operatorCallExpr->getNumArgs(),
                calleeMethodDecl->getNumParams());
            for (unsigned i = 1; i < n; ++i)
                if (operatorCallExpr->getArg(i) == stmt) {
                    return isPointerOrReferenceToConst(calleeMethodDecl->getParamDecl(i - 1)->getType());
                }
        } else {
            const Expr* callee = operatorCallExpr->getCallee()->IgnoreParenImpCasts();
            const DeclRefExpr* dr = dyn_cast<DeclRefExpr>(callee);
            const FunctionDecl* calleeFunctionDecl = nullptr;
            if (dr) {
                calleeFunctionDecl = dyn_cast<FunctionDecl>(dr->getDecl());
            }
            if (calleeFunctionDecl) {
                for (unsigned i = 0; i < operatorCallExpr->getNumArgs(); ++i) {
                    if (operatorCallExpr->getArg(i) == stmt) {
                        return isPointerOrReferenceToConst(calleeFunctionDecl->getParamDecl(i)->getType());
                    }
                }
            }
        }
        return false; // TODO ???
    } else if (auto callExpr = dyn_cast<CallExpr>(parent)) {
        QualType functionType = callExpr->getCallee()->getType();
        if (functionType->isFunctionPointerType()) {
            functionType = functionType->getPointeeType();
        }
        if (const FunctionProtoType* prototype = functionType->getAs<FunctionProtoType>()) {
            // TODO could do better
            if (prototype->isVariadic()) {
                return false;
            }
            if (callExpr->getCallee() == stmt) {
                return true;
            }
            for (unsigned i = 0; i < callExpr->getNumArgs(); ++i) {
                if (callExpr->getArg(i) == stmt) {
                    return isPointerOrReferenceToConst(prototype->getParamType(i));
                }
            }
        }
        const FunctionDecl* calleeFunctionDecl = callExpr->getDirectCallee();
        if (calleeFunctionDecl)
        {
            if (auto memberCallExpr = dyn_cast<CXXMemberCallExpr>(parent)) {
                const MemberExpr* memberExpr = dyn_cast<MemberExpr>(stmt);
                if (memberExpr && memberCallExpr->getImplicitObjectArgument() == memberExpr->getBase())
                {
                    const CXXMethodDecl* calleeMethodDecl = dyn_cast<CXXMethodDecl>(calleeFunctionDecl);
                    // some classes like std::unique_ptr do not do a very good job with their get() which is always const
                    if (calleeMethodDecl->getIdentifier() && calleeMethodDecl->getName() == "get") {
                        return checkIfCanBeConst(parent, cxxMethodDecl);
                    }
                    // VclPtr<T>'s implicit conversion to T*
                    if (isa<CXXConversionDecl>(calleeMethodDecl)) {
                        if (loplugin::DeclCheck(calleeMethodDecl->getParent()).Class("OWeakObject").Namespace("cppu").GlobalNamespace())
                            return false;
                        return checkIfCanBeConst(parent, cxxMethodDecl);
                    }
                    return calleeMethodDecl->isConst();
                }
            }
            // TODO could do better
            if (calleeFunctionDecl->isVariadic()) {
                return false;
            }
            if (callExpr->getCallee() == stmt) {
                return true;
            }
            for (unsigned i = 0; i < callExpr->getNumArgs(); ++i) {
                if (i >= calleeFunctionDecl->getNumParams()) // can happen in template code
                    return false;
                if (callExpr->getArg(i) == stmt) {
                    return isPointerOrReferenceToConst(calleeFunctionDecl->getParamDecl(i)->getType());
                }
            }
        }
        return false; // TODO ????
//    } else if (auto callExpr = dyn_cast<ObjCMessageExpr>(parent)) {
//        if (callExpr->getInstanceReceiver() == stmt) {
//            return true;
//        }
//        if (auto const method = callExpr->getMethodDecl()) {
//            // TODO could do better
//            if (method->isVariadic()) {
//                return false;
//            }
//            assert(method->param_size() == callExpr->getNumArgs());
//            for (unsigned i = 0; i < callExpr->getNumArgs(); ++i) {
//                if (callExpr->getArg(i) == stmt) {
//                    return isPointerOrReferenceToConst(
//                        method->param_begin()[i]->getType());
//                }
//            }
//        }
//        return false; // TODO ????
    } else if (isa<CXXReinterpretCastExpr>(parent)) {
        return false;
    } else if (isa<ImplicitCastExpr>(parent)) {
        return checkIfCanBeConst(parent, cxxMethodDecl);
    } else if (isa<CXXStaticCastExpr>(parent)) {
        return checkIfCanBeConst(parent, cxxMethodDecl);
    } else if (isa<CXXDynamicCastExpr>(parent)) {
        return checkIfCanBeConst(parent, cxxMethodDecl);
    } else if (isa<CXXFunctionalCastExpr>(parent)) {
        return checkIfCanBeConst(parent, cxxMethodDecl);
    } else if (isa<CXXConstCastExpr>(parent)) {
        return false;
    } else if (isa<CStyleCastExpr>(parent)) {
        return checkIfCanBeConst(parent, cxxMethodDecl);
//    } else if (isa<CastExpr>(parent)) { // all other cast expression subtypes
//        if (auto e = dyn_cast<ExplicitCastExpr>(parent)) {
//            if (loplugin::TypeCheck(e->getTypeAsWritten()).Void()) {
//                if (auto const sub = dyn_cast<DeclRefExpr>(
//                        e->getSubExpr()->IgnoreParenImpCasts()))
//                {
//                    if (sub->getDecl() == cxxMethodDecl) {
//                        return false;
//                    }
//                }
//            }
//        }
//        return checkIfCanBeConst(parent, cxxMethodDecl);
    } else if (isa<MemberExpr>(parent)) {
        return checkIfCanBeConst(parent, cxxMethodDecl);
    } else if (auto arraySubscriptExpr = dyn_cast<ArraySubscriptExpr>(parent)) {
        if (arraySubscriptExpr->getIdx() == stmt)
            return true;
        return checkIfCanBeConst(parent, cxxMethodDecl);
    } else if (isa<ParenExpr>(parent)) {
        return checkIfCanBeConst(parent, cxxMethodDecl);
    } else if (auto declStmt = dyn_cast<DeclStmt>(parent)) {
        for (Decl const * decl : declStmt->decls())
            if (auto varDecl = dyn_cast<VarDecl>(decl)) {
                if (varDecl->getInit() == stmt) {
                    auto tc = loplugin::TypeCheck(varDecl->getType());
                    if (tc.LvalueReference() && !tc.LvalueReference().Const())
                        return false;
                    if (tc.Pointer() && !tc.Pointer().Const())
                        return false;
                    return true;
                }
            }
        // fall through
    } else if (isa<ReturnStmt>(parent)) {
        return !isPointerOrReferenceToNonConst(cxxMethodDecl->getReturnType());
    } else if (isa<InitListExpr>(parent)) {
        return false; // TODO could be improved
    } else if (isa<IfStmt>(parent)) {
        return true;
    } else if (isa<WhileStmt>(parent)) {
        return true;
    } else if (isa<ForStmt>(parent)) {
        return true;
    } else if (isa<CompoundStmt>(parent)) {
        return true;
    } else if (isa<SwitchStmt>(parent)) {
        return true;
    } else if (isa<DoStmt>(parent)) {
        return true;
    } else if (isa<CXXDeleteExpr>(parent)) {
        return false;
//    } else if (isa<VAArgExpr>(parent)) {
//        return false;
    } else if (isa<CXXDependentScopeMemberExpr>(parent)) {
        return false;
    } else if (isa<MaterializeTemporaryExpr>(parent)) {
        return checkIfCanBeConst(parent, cxxMethodDecl);
    } else if (auto conditionalExpr = dyn_cast<ConditionalOperator>(parent)) {
        if (conditionalExpr->getCond() == stmt)
            return true;
        return checkIfCanBeConst(parent, cxxMethodDecl);
//    } else if (isa<UnaryExprOrTypeTraitExpr>(parent)) {
//        return false; // ???
    } else if (isa<CXXNewExpr>(parent)) {
//        for (auto pa : cxxNewExpr->placement_arguments())
//            if (pa == stmt)
//                return false;
        return true; // because the Stmt must be a parameter to the expression, probably an array length
//    } else if (auto lambdaExpr = dyn_cast<LambdaExpr>(parent)) {
////        for (auto it = lambdaExpr->capture_begin(); it != lambdaExpr->capture_end(); ++it)
////        {
////            if (it->capturesVariable() && it->getCapturedVar() == cxxMethodDecl)
////                return it->getCaptureKind() != LCK_ByRef;
////        }
//        return true;
//    } else if (isa<CXXTypeidExpr>(parent)) {
//        return true;
    } else if (isa<ParenListExpr>(parent)) {
        return true;
    } else if (isa<CXXUnresolvedConstructExpr>(parent)) {
        return false;
//    } else if (isa<UnresolvedMemberExpr>(parent)) {
//        return false;
//    } else if (isa<PackExpansionExpr>(parent)) {
//        return false;
    } else if (isa<ExprWithCleanups>(parent)) {
        return checkIfCanBeConst(parent, cxxMethodDecl);
//    } else if (isa<CaseStmt>(parent)) {
//        return true;
//    } else if (isa<CXXPseudoDestructorExpr>(parent)) {
//        return false;
//    } else if (isa<CXXDependentScopeMemberExpr>(parent)) {
//        return false;
//    } else if (isa<ObjCIvarRefExpr>(parent)) {
//        return checkIfCanBeConst(parent, cxxMethodDecl);
    } else if (isa<CXXTemporaryObjectExpr>(parent)) {
        return true;
    } else if (isa<CXXBindTemporaryExpr>(parent)) {
        return true;
    }
    if (parent)
        parent->dump();
//    if (cxxMethodDecl)
//        cxxMethodDecl->dump();
    report(
         DiagnosticsEngine::Warning,
         "oh dear, what can the matter be?",
          parent->getBeginLoc())
          << parent->getSourceRange();
    return false;
}

bool ConstMethod::isPointerOrReferenceToConst(const QualType& qt) {
    auto const type = loplugin::TypeCheck(qt);
    if (type.Pointer()) {
        return bool(type.Pointer().Const());
    } else if (type.LvalueReference()) {
        return bool(type.LvalueReference().Const());
    }
    return false;
}

bool ConstMethod::isPointerOrReferenceToNonConst(const QualType& qt) {
    auto const type = loplugin::TypeCheck(qt);
    if (type.Pointer()) {
        return !bool(type.Pointer().Const());
    } else if (type.LvalueReference()) {
        return !bool(type.LvalueReference().Const());
    }
    return false;
}

loplugin::Plugin::Registration< ConstMethod > X("constmethod", false);

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

quality96%

¤ Dauer der Verarbeitung: 0.12 Sekunden ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.