mirror of
https://github.com/reactos/CMake.git
synced 2024-12-05 02:06:34 +00:00
fc1c7cf85d
The storage of a pointer means that the ownership and lifetime are externally determined, which is harder to reason about. It also imposes API constraints, requiring APIs to return references to backtraces. This pointer storage was introduced in commit v3.1.0-rc1~425^2~3 (genex: remove the need for backtraces, 2014-05-23). As backtraces are now cheap to copy around, just do that instead.
165 lines
5.3 KiB
C++
165 lines
5.3 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 <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 cmGeneratorExpressionContext;
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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(
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cmListFileBacktrace const& backtrace = cmListFileBacktrace());
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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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bool resolveRelative = false);
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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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static std::string StripEmptyListElements(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 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 std::string& config,
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bool quiet = false,
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cmTarget const* headTarget = 0,
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cmTarget const* currentTarget = 0,
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cmGeneratorExpressionDAGChecker *dagChecker = 0,
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std::string const& language = std::string()) const;
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const char* Evaluate(cmMakefile* mf, const std::string& config,
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bool quiet,
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cmTarget const* headTarget,
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cmGeneratorExpressionDAGChecker *dagChecker,
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std::string const& language = std::string()) 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->DependTargets; }
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std::set<std::string> const& GetSeenTargetProperties() const
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{ return this->SeenTargetProperties; }
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std::set<cmTarget const*> const& GetAllTargetsSeen() const
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{ return this->AllTargetsSeen; }
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~cmCompiledGeneratorExpression();
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std::string const& 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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bool GetHadHeadSensitiveCondition() const
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{
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return this->HadHeadSensitiveCondition;
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}
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std::set<cmTarget const*> GetSourceSensitiveTargets() const
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{
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return this->SourceSensitiveTargets;
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}
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void SetEvaluateForBuildsystem(bool eval)
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{
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this->EvaluateForBuildsystem = eval;
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}
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void GetMaxLanguageStandard(cmTarget const* tgt,
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std::map<std::string, std::string>& mapping);
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private:
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const char* EvaluateWithContext(cmGeneratorExpressionContext& context,
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cmGeneratorExpressionDAGChecker *dagChecker) const;
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cmCompiledGeneratorExpression(cmListFileBacktrace const& backtrace,
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const std::string& 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 NeedsEvaluation;
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mutable std::set<cmTarget*> DependTargets;
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mutable std::set<cmTarget const*> AllTargetsSeen;
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mutable std::set<std::string> SeenTargetProperties;
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mutable std::map<cmTarget const*, std::map<std::string, std::string> >
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MaxLanguageStandard;
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mutable std::string Output;
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mutable bool HadContextSensitiveCondition;
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mutable bool HadHeadSensitiveCondition;
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mutable std::set<cmTarget const*> SourceSensitiveTargets;
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bool EvaluateForBuildsystem;
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};
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#endif
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