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69 lines
1.7 KiB
69 lines
1.7 KiB
/* 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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#pragma once
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#include "cmConfigure.h" // IWYU pragma: keep
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#include <functional>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include <cm/string_view>
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#include "cmLinkedTree.h"
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#include "cmString.hxx"
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#include "cmValue.h"
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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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using StackIter = cmLinkedTree<cmDefinitions>::iterator;
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public:
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// -- Static member functions
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static cmValue Get(const std::string& key, 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, StackIter begin, StackIter end);
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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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// -- Member functions
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/** Set a value associated with a key. */
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void Set(const std::string& key, cm::string_view value);
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/** Unset a definition. */
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void Unset(const std::string& key);
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private:
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/** String with existence boolean. */
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struct Def
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{
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public:
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Def() = default;
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Def(cm::string_view value)
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: Value(value)
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{
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}
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cm::String Value;
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};
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static Def NoDef;
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std::unordered_map<cm::String, Def> 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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