104 lines
2.4 KiB
C++
104 lines
2.4 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#ifndef cmDefinitions_h
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#define cmDefinitions_h
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#include <cmConfigure.h>
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#include "cmLinkedTree.h"
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#include <string>
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#include <vector>
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#if defined(CMAKE_BUILD_WITH_CMAKE)
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#ifdef CMake_HAVE_CXX_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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#else
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#include <map>
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#endif
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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 cmLinkedTree<cmDefinitions>::iterator StackIter;
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public:
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static const char* Get(const std::string& key, StackIter begin,
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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, StackIter begin, StackIter 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(StackIter begin, StackIter end);
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static cmDefinitions MakeClosure(StackIter begin, StackIter 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()
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: std_string()
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, Exists(false)
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, Used(false)
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{
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}
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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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}
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Def(const std_string& v)
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: std_string(v)
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, Exists(true)
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, Used(false)
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{
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}
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Def(Def const& d)
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: std_string(d)
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, Exists(d.Exists)
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, Used(d.Used)
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{
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}
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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_CXX_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, StackIter begin,
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StackIter end, bool raise);
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};
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#endif
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