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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#ifndef cmGeneratorExpression_h
#define cmGeneratorExpression_h
#include <cmConfigure.h>
#include "cmListFileCache.h"
#include <cm_auto_ptr.hxx>
#include <map>
#include <set>
#include <string>
#include <vector>
class cmCompiledGeneratorExpression;
class cmGeneratorTarget;
class cmLocalGenerator;
struct cmGeneratorExpressionContext;
struct cmGeneratorExpressionDAGChecker;
struct cmGeneratorExpressionEvaluator;
/** \class cmGeneratorExpression
* \brief Evaluate generate-time query expression syntax.
*
* cmGeneratorExpression instances are used by build system generator
* implementations to evaluate the $<> generator expression syntax.
* Generator expressions are evaluated just before the generate step
* writes strings into the build system. They have knowledge of the
* build configuration which is not available at configure time.
*/
class cmGeneratorExpression
{
public:
/** Construct. */
cmGeneratorExpression(
cmListFileBacktrace const& backtrace = cmListFileBacktrace());
~cmGeneratorExpression();
CM_AUTO_PTR<cmCompiledGeneratorExpression> Parse(std::string const& input);
CM_AUTO_PTR<cmCompiledGeneratorExpression> Parse(const char* input);
enum PreprocessContext
{
StripAllGeneratorExpressions,
BuildInterface,
InstallInterface
};
static std::string Preprocess(const std::string& input,
PreprocessContext context,
bool resolveRelative = false);
static void Split(const std::string& input,
std::vector<std::string>& output);
static std::string::size_type Find(const std::string& input);
static bool IsValidTargetName(const std::string& input);
static std::string StripEmptyListElements(const std::string& input);
private:
cmGeneratorExpression(const cmGeneratorExpression&);
void operator=(const cmGeneratorExpression&);
cmListFileBacktrace Backtrace;
};
class cmCompiledGeneratorExpression
{
public:
const char* Evaluate(
cmLocalGenerator* lg, const std::string& config, bool quiet = false,
cmGeneratorTarget const* headTarget = CM_NULLPTR,
cmGeneratorTarget const* currentTarget = CM_NULLPTR,
cmGeneratorExpressionDAGChecker* dagChecker = CM_NULLPTR,
std::string const& language = std::string()) const;
const char* Evaluate(cmLocalGenerator* lg, const std::string& config,
bool quiet, cmGeneratorTarget const* headTarget,
cmGeneratorExpressionDAGChecker* dagChecker,
std::string const& language = std::string()) const;
/** Get set of targets found during evaluations. */
std::set<cmGeneratorTarget*> const& GetTargets() const
{
return this->DependTargets;
}
std::set<std::string> const& GetSeenTargetProperties() const
{
return this->SeenTargetProperties;
}
std::set<cmGeneratorTarget const*> const& GetAllTargetsSeen() const
{
return this->AllTargetsSeen;
}
~cmCompiledGeneratorExpression();
std::string const& GetInput() const { return this->Input; }
cmListFileBacktrace GetBacktrace() const { return this->Backtrace; }
bool GetHadContextSensitiveCondition() const
{
return this->HadContextSensitiveCondition;
}
bool GetHadHeadSensitiveCondition() const
{
return this->HadHeadSensitiveCondition;
}
std::set<cmGeneratorTarget const*> GetSourceSensitiveTargets() const
{
return this->SourceSensitiveTargets;
}
void SetEvaluateForBuildsystem(bool eval)
{
this->EvaluateForBuildsystem = eval;
}
void GetMaxLanguageStandard(cmGeneratorTarget const* tgt,
std::map<std::string, std::string>& mapping);
private:
const char* EvaluateWithContext(
cmGeneratorExpressionContext& context,
cmGeneratorExpressionDAGChecker* dagChecker) const;
cmCompiledGeneratorExpression(cmListFileBacktrace const& backtrace,
const std::string& input);
friend class cmGeneratorExpression;
cmCompiledGeneratorExpression(const cmCompiledGeneratorExpression&);
void operator=(const cmCompiledGeneratorExpression&);
cmListFileBacktrace Backtrace;
std::vector<cmGeneratorExpressionEvaluator*> Evaluators;
const std::string Input;
bool NeedsEvaluation;
mutable std::set<cmGeneratorTarget*> DependTargets;
mutable std::set<cmGeneratorTarget const*> AllTargetsSeen;
mutable std::set<std::string> SeenTargetProperties;
mutable std::map<cmGeneratorTarget const*,
std::map<std::string, std::string> >
MaxLanguageStandard;
mutable std::string Output;
mutable bool HadContextSensitiveCondition;
mutable bool HadHeadSensitiveCondition;
mutable std::set<cmGeneratorTarget const*> SourceSensitiveTargets;
bool EvaluateForBuildsystem;
};
#endif
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