4b55847b81
(The use of isa_and_nonnull<> instead of isa<> is necessary for cases like return (i_styleSettings.*i_getDefaultColor)(); in lcl_getEffectiveColor, svtools/source/table/gridtablerenderer.cxx.) Change-Id: Iffc59b1146dd4ce13bbd3c8a6f46bd3c78a39344 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/109663 Tested-by: Jenkins Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
84 lines
3.3 KiB
C++
84 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
|
|
/*
|
|
* 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/.
|
|
*/
|
|
|
|
#ifndef LO_CLANG_SHARED_PLUGINS
|
|
|
|
#include "check.hxx"
|
|
#include "compat.hxx"
|
|
#include "plugin.hxx"
|
|
|
|
/**
|
|
* Look for places where we are converting from type A through a conversion operator and back to type A,
|
|
* which is redundant. At the moment only look for Color, to aid my ColorData->Color conversion
|
|
*/
|
|
namespace
|
|
{
|
|
class DoubleConvert final : public loplugin::FilteringPlugin<DoubleConvert>
|
|
{
|
|
public:
|
|
explicit DoubleConvert(loplugin::InstantiationData const& data)
|
|
: FilteringPlugin(data)
|
|
{
|
|
}
|
|
void run() override { TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }
|
|
|
|
bool VisitCXXConstructExpr(CXXConstructExpr const*);
|
|
};
|
|
|
|
/**
|
|
The AST looks like:
|
|
|
|
CXXOperatorCallExpr 0x8e5b840 'class Color' lvalue
|
|
|-ImplicitCastExpr 0x8e5b828 'class Color &(*)(class Color &&) noexcept' <FunctionToPointerDecay>
|
|
| `-DeclRefExpr 0x8e5b800 'class Color &(class Color &&) noexcept' lvalue CXXMethod 0x8e59a08 'operator=' 'class Color &(class Color &&) noexcept'
|
|
|-DeclRefExpr 0x8e5b678 'class Color' lvalue Var 0x8e5b5d0 'col2' 'class Color'
|
|
`-MaterializeTemporaryExpr 0x8e5b7e8 'class Color' xvalue
|
|
`-CXXConstructExpr 0x8e5b7b0 'class Color' 'void (ColorData)'
|
|
`-ImplicitCastExpr 0x8e5b798 'ColorData':'unsigned int' <IntegralCast>
|
|
`-CXXFunctionalCastExpr 0x8e5b770 'sal_Int32':'int' functional cast to sal_Int32 <NoOp>
|
|
`-ImplicitCastExpr 0x8e5b758 'sal_Int32':'int' <UserDefinedConversion>
|
|
`-CXXMemberCallExpr 0x8e5b730 'sal_Int32':'int'
|
|
`-MemberExpr 0x8e5b6f8 '<bound member function type>' .operator int 0x8e51048
|
|
`-ImplicitCastExpr 0x8e5b6e0 'const class Color' lvalue <NoOp>
|
|
`-DeclRefExpr 0x8e5b6b0 'class Color' lvalue Var 0x8e5b518 'col1' 'class Color'
|
|
*/
|
|
bool DoubleConvert::VisitCXXConstructExpr(CXXConstructExpr const* cxxConstruct)
|
|
{
|
|
if (ignoreLocation(cxxConstruct))
|
|
return true;
|
|
if (cxxConstruct->getNumArgs() == 0)
|
|
return true;
|
|
auto cxxMemberCallExpr
|
|
= dyn_cast<CXXMemberCallExpr>(cxxConstruct->getArg(0)->IgnoreParenCasts());
|
|
if (!cxxMemberCallExpr)
|
|
return true;
|
|
if (!compat::isa_and_nonnull<CXXConversionDecl>(cxxMemberCallExpr->getMethodDecl()))
|
|
return true;
|
|
if (cxxConstruct->getType().getCanonicalType().getTypePtr()
|
|
!= cxxMemberCallExpr->getImplicitObjectArgument()
|
|
->getType()
|
|
.getCanonicalType()
|
|
.getTypePtr())
|
|
return true;
|
|
if (!loplugin::TypeCheck(cxxConstruct->getType().getCanonicalType())
|
|
.Class("Color")
|
|
.GlobalNamespace())
|
|
return true;
|
|
|
|
report(DiagnosticsEngine::Warning, "redundant double conversion", cxxConstruct->getExprLoc())
|
|
<< cxxConstruct->getSourceRange();
|
|
return true;
|
|
}
|
|
|
|
static loplugin::Plugin::Registration<DoubleConvert> doubleconvert("doubleconvert");
|
|
}
|
|
|
|
#endif // LO_CLANG_SHARED_PLUGINS
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
|