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68 lines
2.7 KiB
C++
68 lines
2.7 KiB
C++
// SPDX-FileCopyrightText: 2002-2024 PCSX2 Dev Team
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// SPDX-License-Identifier: GPL-3.0+
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/**
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* Provides a map template which doesn't require heap allocations for lookups.
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*/
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#pragma once
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#include "Pcsx2Defs.h"
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#include <map>
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#include <set>
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#include <string>
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#include <unordered_map>
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#include <unordered_set>
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namespace detail
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{
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struct transparent_string_hash
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{
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using is_transparent = void;
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std::size_t operator()(const std::string_view& v) const { return std::hash<std::string_view>{}(v); }
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std::size_t operator()(const std::string& s) const { return std::hash<std::string>{}(s); }
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std::size_t operator()(const char* s) const { return operator()(std::string_view(s)); }
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};
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struct transparent_string_equal
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{
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using is_transparent = void;
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bool operator()(const std::string& lhs, const std::string_view& rhs) const { return lhs == rhs; }
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bool operator()(const std::string& lhs, const std::string& rhs) const { return lhs == rhs; }
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bool operator()(const std::string& lhs, const char* rhs) const { return lhs == rhs; }
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bool operator()(const std::string_view& lhs, const std::string& rhs) const { return lhs == rhs; }
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bool operator()(const char* lhs, const std::string& rhs) const { return lhs == rhs; }
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};
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struct transparent_string_less
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{
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using is_transparent = void;
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bool operator()(const std::string& lhs, const std::string_view& rhs) const { return lhs < rhs; }
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bool operator()(const std::string& lhs, const std::string& rhs) const { return lhs < rhs; }
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bool operator()(const std::string& lhs, const char* rhs) const { return lhs < rhs; }
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bool operator()(const std::string_view& lhs, const std::string& rhs) const { return lhs < rhs; }
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bool operator()(const char* lhs, const std::string& rhs) const { return lhs < rhs; }
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};
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} // namespace detail
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template <typename ValueType>
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using UnorderedStringMap =
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std::unordered_map<std::string, ValueType, detail::transparent_string_hash, detail::transparent_string_equal>;
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template <typename ValueType>
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using UnorderedStringMultimap =
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std::unordered_multimap<std::string, ValueType, detail::transparent_string_hash, detail::transparent_string_equal>;
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using UnorderedStringSet =
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std::unordered_set<std::string, detail::transparent_string_hash, detail::transparent_string_equal>;
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using UnorderedStringMultiSet =
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std::unordered_multiset<std::string, detail::transparent_string_hash, detail::transparent_string_equal>;
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template <typename ValueType>
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using StringMap = std::map<std::string, ValueType, detail::transparent_string_less>;
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template <typename ValueType>
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using StringMultiMap = std::multimap<std::string, ValueType, detail::transparent_string_less>;
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using StringSet = std::set<std::string, detail::transparent_string_less>;
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using StringMultiSet = std::multiset<std::string, detail::transparent_string_less>;
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