d4e5c6787c
This tracking was added during the development of commit 042ecf04 (Add API to calculate link-interface-dependent bool properties or error., 2013-01-06), but was never used. It was not necessary to use the content because what is really useful in that logic is to determine if a property has been implied to be null by appearing in a LINK_LIBRARIES genex. I think the motivating usecase for developing the feature of keeping track of the targets relevant to a property was that I thought it would make it possible to allow requiring granular compatibility of interface properties only for targets which depended on the interface property. Eg: add_library(foo ...) add_library(bar ...) add_executable(user ...) # Read the INTERFACE_POSITION_INDEPENDENT_CODE from bar, but not # from foo: target_link_libraries(user foo $<$<TARGET_PROPERTY:POSTITION_INDEPENDENT_CODE>:bar>) This obviously doesn't make sense. We require that INTERFACE properties are consistent across all linked targets instead.
133 lines
4.0 KiB
C++
133 lines
4.0 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#ifndef cmGeneratorExpression_h
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#define cmGeneratorExpression_h
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#include "cmStandardIncludes.h"
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#include "cmListFileCache.h"
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#include <stack>
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#include <cmsys/RegularExpression.hxx>
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#include <cmsys/auto_ptr.hxx>
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class cmTarget;
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class cmMakefile;
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class cmListFileBacktrace;
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struct cmGeneratorExpressionEvaluator;
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struct cmGeneratorExpressionDAGChecker;
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class cmCompiledGeneratorExpression;
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/** \class cmGeneratorExpression
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* \brief Evaluate generate-time query expression syntax.
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*
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* cmGeneratorExpression instances are used by build system generator
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* implementations to evaluate the $<> generator expression syntax.
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* Generator expressions are evaluated just before the generate step
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* writes strings into the build system. They have knowledge of the
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* build configuration which is not available at configure time.
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*/
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class cmGeneratorExpression
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{
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public:
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/** Construct. */
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cmGeneratorExpression(cmListFileBacktrace const& backtrace);
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~cmGeneratorExpression();
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cmsys::auto_ptr<cmCompiledGeneratorExpression> Parse(
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std::string const& input);
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cmsys::auto_ptr<cmCompiledGeneratorExpression> Parse(const char* input);
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enum PreprocessContext {
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StripAllGeneratorExpressions,
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BuildInterface,
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InstallInterface
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};
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static std::string Preprocess(const std::string &input,
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PreprocessContext context);
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static void Split(const std::string &input,
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std::vector<std::string> &output);
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static std::string::size_type Find(const std::string &input);
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static bool IsValidTargetName(const std::string &input);
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private:
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cmGeneratorExpression(const cmGeneratorExpression &);
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void operator=(const cmGeneratorExpression &);
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cmListFileBacktrace const& Backtrace;
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};
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class cmCompiledGeneratorExpression
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{
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public:
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const char* Evaluate(cmMakefile* mf, const char* config,
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bool quiet = false,
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cmTarget *headTarget = 0,
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cmTarget *currentTarget = 0,
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cmGeneratorExpressionDAGChecker *dagChecker = 0) const;
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const char* Evaluate(cmMakefile* mf, const char* config,
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bool quiet,
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cmTarget *headTarget,
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cmGeneratorExpressionDAGChecker *dagChecker) const;
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/** Get set of targets found during evaluations. */
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std::set<cmTarget*> const& GetTargets() const
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{ return this->Targets; }
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std::set<cmStdString> const& GetSeenTargetProperties() const
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{ return this->SeenTargetProperties; }
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~cmCompiledGeneratorExpression();
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std::string GetInput() const
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{
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return this->Input;
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}
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cmListFileBacktrace GetBacktrace() const
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{
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return this->Backtrace;
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}
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bool GetHadContextSensitiveCondition() const
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{
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return this->HadContextSensitiveCondition;
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}
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private:
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cmCompiledGeneratorExpression(cmListFileBacktrace const& backtrace,
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const char *input);
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friend class cmGeneratorExpression;
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cmCompiledGeneratorExpression(const cmCompiledGeneratorExpression &);
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void operator=(const cmCompiledGeneratorExpression &);
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cmListFileBacktrace Backtrace;
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std::vector<cmGeneratorExpressionEvaluator*> Evaluators;
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const std::string Input;
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bool NeedsParsing;
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mutable std::set<cmTarget*> Targets;
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mutable std::set<cmStdString> SeenTargetProperties;
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mutable std::string Output;
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mutable bool HadContextSensitiveCondition;
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};
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#endif
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