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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2012 Stephen Kelly <steveire@gmail.com>
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#include "cmGeneratorExpressionDAGChecker.h"
#include "cmMakefile.h"
//----------------------------------------------------------------------------
cmGeneratorExpressionDAGChecker::cmGeneratorExpressionDAGChecker(
const cmListFileBacktrace &backtrace,
const std::string &target,
const std::string &property,
const GeneratorExpressionContent *content,
cmGeneratorExpressionDAGChecker *parent)
: Parent(parent), Target(target), Property(property),
Content(content), Backtrace(backtrace)
{
this->CheckResult = this->checkGraph();
}
//----------------------------------------------------------------------------
cmGeneratorExpressionDAGChecker::Result
cmGeneratorExpressionDAGChecker::check() const
{
return this->CheckResult;
}
//----------------------------------------------------------------------------
void cmGeneratorExpressionDAGChecker::reportError(
cmGeneratorExpressionContext *context,
const std::string &expr)
{
if (this->CheckResult == DAG)
{
return;
}
context->HadError = true;
if (context->Quiet)
{
return;
}
const cmGeneratorExpressionDAGChecker *parent = this->Parent;
if (parent && !parent->Parent)
{
cmOStringStream e;
e << "Error evaluating generator expression:\n"
<< " " << expr << "\n"
<< "Self reference on target \""
<< context->HeadTarget->GetName() << "\".\n";
context->Makefile->GetCMakeInstance()
->IssueMessage(cmake::FATAL_ERROR, e.str().c_str(),
parent->Backtrace);
return;
}
{
cmOStringStream e;
e << "Error evaluating generator expression:\n"
<< " " << expr << "\n"
<< "Dependency loop found.";
context->Makefile->GetCMakeInstance()
->IssueMessage(cmake::FATAL_ERROR, e.str().c_str(),
context->Backtrace);
}
int loopStep = 1;
while (parent)
{
cmOStringStream e;
e << "Loop step " << loopStep << "\n"
<< " "
<< (parent->Content ? parent->Content->GetOriginalExpression() : expr)
<< "\n";
context->Makefile->GetCMakeInstance()
->IssueMessage(cmake::FATAL_ERROR, e.str().c_str(),
parent->Backtrace);
parent = parent->Parent;
++loopStep;
}
}
//----------------------------------------------------------------------------
cmGeneratorExpressionDAGChecker::Result
cmGeneratorExpressionDAGChecker::checkGraph() const
{
const cmGeneratorExpressionDAGChecker *parent = this->Parent;
while (parent)
{
if (this->Target == parent->Target && this->Property == parent->Property)
{
return parent->Parent ? CYCLIC_REFERENCE : SELF_REFERENCE;
}
parent = parent->Parent;
}
return DAG;
}
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