CMake/Source/cmGeneratorExpressionDAGChecker.h
Stephen Kelly c67b8124f7 Make cycles in target properties ignored, not an error.
Constructs such as these are an error as they are direct self-references:

 set_property(TARGET foo APPEND PROPERTY
   INCLUDE_DIRECTORIES $<TARGET_PROPERTY:foo,INCLUDE_DIRECTORIES>)
 set_property(TARGET foo APPEND PROPERTY
   INCLUDE_DIRECTORIES $<TARGET_PROPERTY:INCLUDE_DIRECTORIES>)

However, this is an indirect self-reference in a cycle, and not an error:

 set_property(TARGET foo APPEND PROPERTY
   INCLUDE_DIRECTORIES $<TARGET_PROPERTY:bar,INCLUDE_DIRECTORIES>)
 set_property(TARGET bar APPEND PROPERTY
   INCLUDE_DIRECTORIES $<TARGET_PROPERTY:foo,INCLUDE_DIRECTORIES>)
2013-01-05 01:18:36 +01:00

51 lines
1.6 KiB
C++

/*============================================================================
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.
============================================================================*/
#ifndef cmGeneratorExpressionDAGChecker_h
#define cmGeneratorExpressionDAGChecker_h
#include "cmStandardIncludes.h"
#include "cmGeneratorExpressionEvaluator.h"
//----------------------------------------------------------------------------
struct cmGeneratorExpressionDAGChecker
{
cmGeneratorExpressionDAGChecker(const cmListFileBacktrace &backtrace,
const std::string &target,
const std::string &property,
const GeneratorExpressionContent *content,
cmGeneratorExpressionDAGChecker *parent);
enum Result {
DAG,
SELF_REFERENCE,
CYCLIC_REFERENCE
};
Result check() const;
void reportError(cmGeneratorExpressionContext *context,
const std::string &expr);
private:
Result checkGraph() const;
private:
const cmGeneratorExpressionDAGChecker * const Parent;
const std::string Target;
const std::string Property;
const GeneratorExpressionContent * const Content;
const cmListFileBacktrace Backtrace;
Result CheckResult;
};
#endif