e268840c0a
- The `cmDefinitions::Def` struct is simplified by removing an unused constructor and the `std_string` type definition. The std::string value becomes a member variable instead of being derived from. - The `cmDefinitions::Unset` method is added that unsets a definition. It has the same functionality as calling `cmDefinitions::Set` with a `nullptr` value argument, - The `cmDefinitions::Set` method gets an overloaded version that takes a `cm::string_view` as value argument. - The originl `cmDefinitions::Set` method with `const char*` argument is refactored to either call the `cm::string_view` based `cmDefinitions::Set` overload or `cmDefinitions::Unset`, depending on whether the value `const char*` is a nullptr (`Unset`) or not (`Set`).
82 lines
2.1 KiB
C++
82 lines
2.1 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" // IWYU pragma: keep
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#include "cm_string_view.hxx"
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#include "cmLinkedTree.h"
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#include <string>
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#include <unordered_map>
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#include <vector>
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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 std::string* 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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{
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if (value) {
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this->Set(key, cm::string_view(value));
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} else {
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this->Unset(key);
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}
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}
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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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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
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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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, Exists(true)
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{
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}
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std::string Value;
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bool Exists = false;
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bool Used = false;
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};
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static Def NoDef;
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typedef std::unordered_map<std::string, Def> MapType;
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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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