9f4d23c151
by checking if the current namespace decl is in our code, so we have to scan less stuff, which results in a 10% perf improvement for me Change-Id: Idf0e30d57b6d0dcd13daa9ed679c28b9d233d387 Reviewed-on: https://gerrit.libreoffice.org/58942 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/*
|
|
* This file is part of the LibreOffice project.
|
|
*
|
|
* Based on LLVM/Clang.
|
|
*
|
|
* This file is distributed under the University of Illinois Open Source
|
|
* License. See LICENSE.TXT for details.
|
|
*
|
|
*/
|
|
|
|
#include "tutorial3.hxx"
|
|
|
|
/*
|
|
This is a rewriter.
|
|
|
|
It looks for if statements with a comparison followed by literal return false
|
|
and modifies the return statements to 'return maybereturntrue;'
|
|
*/
|
|
|
|
namespace loplugin
|
|
{
|
|
|
|
// Ctor, pass arguments.
|
|
Tutorial3::Tutorial3( const InstantiationData& data )
|
|
: FilteringRewritePlugin( data )
|
|
{
|
|
}
|
|
|
|
void Tutorial3::run()
|
|
{
|
|
TraverseDecl( compiler.getASTContext().getTranslationUnitDecl());
|
|
}
|
|
|
|
bool Tutorial3::VisitIfStmt( const IfStmt* ifstmt )
|
|
{
|
|
if( ignoreLocation( ifstmt ))
|
|
return true;
|
|
if( const BinaryOperator* oper = dyn_cast< BinaryOperator >( ifstmt->getCond()))
|
|
{
|
|
if( oper->getOpcode() == BO_EQ )
|
|
{
|
|
// Modify the sub-statement if it is 'return false'.
|
|
modifyReturnFalse( ifstmt->getThen());
|
|
// Modify the sub-statement if it is '{ return false; }'.
|
|
if( const CompoundStmt* compound = dyn_cast< CompoundStmt >( ifstmt->getThen()))
|
|
{
|
|
if( compound->size() == 1 ) // one statement
|
|
modifyReturnFalse( *compound->body_begin());
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void Tutorial3::modifyReturnFalse( const Stmt* stmt )
|
|
{
|
|
// Is it return statement?
|
|
if( const ReturnStmt* returnstmt = dyn_cast< ReturnStmt >( stmt ))
|
|
{
|
|
// dyn_cast_or_null<> can also be passed NULL, unlike dyn_cast<>
|
|
if( const CXXBoolLiteralExpr* boolliteral = dyn_cast_or_null< CXXBoolLiteralExpr >( returnstmt->getRetValue()))
|
|
{
|
|
if( boolliteral->getValue() == false )
|
|
{ // It is, modify the false to true using LO plugin helper function.
|
|
replaceText( boolliteral->getSourceRange(), "maybereturntrue" );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Register the plugin action with the LO plugin handling.
|
|
static Plugin::Registration< Tutorial3 > X( "tutorial3" );
|
|
|
|
} // namespace
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|