92 lines
2.8 KiB
C++
92 lines
2.8 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 cmDefinitions_h
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#define cmDefinitions_h
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#include "cmStandardIncludes.h"
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#if defined(CMAKE_BUILD_WITH_CMAKE)
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#ifdef CMake_HAVE_CXX11_UNORDERED_MAP
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#include <unordered_map>
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#else
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#include "cmsys/hash_map.hxx"
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#endif
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#endif
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#include <list>
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/** \class cmDefinitions
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* \brief Store a scope of variable definitions for CMake language.
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*
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* This stores the state of variable definitions (set or unset) for
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* one scope. Sets are always local. Gets search parent scopes
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* transitively and save results locally.
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*/
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class cmDefinitions
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{
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typedef std::list<cmDefinitions>::reverse_iterator StackIter;
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typedef std::list<cmDefinitions>::const_reverse_iterator StackConstIter;
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public:
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static const char* Get(const std::string& key,
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StackIter begin, StackIter end);
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static void Raise(const std::string& key, StackIter begin, StackIter end);
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static bool HasKey(const std::string& key,
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StackConstIter begin, StackConstIter end);
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/** Set (or unset if null) a value associated with a key. */
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void Set(const std::string& key, const char* value);
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std::vector<std::string> UnusedKeys() const;
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static std::vector<std::string> ClosureKeys(StackConstIter begin,
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StackConstIter end);
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static cmDefinitions MakeClosure(StackConstIter begin, StackConstIter end);
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private:
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// String with existence boolean.
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struct Def: public std::string
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{
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private:
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typedef std::string std_string;
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public:
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Def(): std_string(), Exists(false), Used(false) {}
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Def(const char* v)
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: std_string(v ? v : ""),
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Exists(v ? true : false),
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Used(false)
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{}
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Def(const std_string& v): std_string(v), Exists(true), Used(false) {}
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Def(Def const& d): std_string(d), Exists(d.Exists), Used(d.Used) {}
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bool Exists;
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bool Used;
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};
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static Def NoDef;
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#if defined(CMAKE_BUILD_WITH_CMAKE)
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#ifdef CMake_HAVE_CXX11_UNORDERED_MAP
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typedef std::unordered_map<std::string, Def> MapType;
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#else
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typedef cmsys::hash_map<std::string, Def> MapType;
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#endif
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#else
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typedef std::map<std::string, Def> MapType;
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#endif
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MapType Map;
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static Def const& GetInternal(const std::string& key,
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StackIter begin, StackIter end, bool raise);
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};
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#endif
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