87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
/*============================================================================
|
|
CMake - Cross Platform Makefile Generator
|
|
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
|
|
|
|
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 cmDefinitions_h
|
|
#define cmDefinitions_h
|
|
|
|
#include "cmStandardIncludes.h"
|
|
|
|
/** \class cmDefinitions
|
|
* \brief Store a scope of variable definitions for CMake language.
|
|
*
|
|
* This stores the state of variable definitions (set or unset) for
|
|
* one scope. Sets are always local. Gets search parent scopes
|
|
* transitively and save results locally.
|
|
*/
|
|
class cmDefinitions
|
|
{
|
|
public:
|
|
/** Construct with the given parent scope. */
|
|
cmDefinitions(cmDefinitions* parent = 0);
|
|
|
|
/** Reset object as if newly constructed. */
|
|
void Reset(cmDefinitions* parent = 0);
|
|
|
|
/** Returns the parent scope, if any. */
|
|
cmDefinitions* GetParent() const { return this->Up; }
|
|
|
|
/** Get the value associated with a key; null if none.
|
|
Store the result locally if it came from a parent. */
|
|
const char* Get(const char* key);
|
|
|
|
/** Set (or unset if null) a value associated with a key. */
|
|
const char* Set(const char* key, const char* value);
|
|
|
|
/** Get the set of all local keys. */
|
|
std::set<cmStdString> LocalKeys() const;
|
|
|
|
/** Compute the closure of all defined keys with values.
|
|
This flattens the scope. The result has no parent. */
|
|
cmDefinitions Closure() const;
|
|
|
|
/** Compute the set of all defined keys. */
|
|
std::set<cmStdString> ClosureKeys() const;
|
|
|
|
private:
|
|
// String with existence boolean.
|
|
struct Def: public cmStdString
|
|
{
|
|
Def(): cmStdString(), Exists(false) {}
|
|
Def(const char* v): cmStdString(v?v:""), Exists(v?true:false) {}
|
|
Def(Def const& d): cmStdString(d), Exists(d.Exists) {}
|
|
bool Exists;
|
|
};
|
|
static Def NoDef;
|
|
|
|
// Parent scope, if any.
|
|
cmDefinitions* Up;
|
|
|
|
// Local definitions, set or unset.
|
|
typedef std::map<cmStdString, Def> MapType;
|
|
MapType Map;
|
|
|
|
// Internal query and update methods.
|
|
Def const& GetInternal(const char* key);
|
|
Def const& SetInternal(const char* key, Def const& def);
|
|
|
|
// Implementation of Closure() method.
|
|
struct ClosureTag {};
|
|
cmDefinitions(ClosureTag const&, cmDefinitions const* root);
|
|
void ClosureImpl(std::set<cmStdString>& undefined,
|
|
cmDefinitions const* defs);
|
|
|
|
// Implementation of ClosureKeys() method.
|
|
void ClosureKeys(std::set<cmStdString>& defined,
|
|
std::set<cmStdString>& undefined) const;
|
|
};
|
|
|
|
#endif
|