Stephen Seo
a008830373
All source files in src/EC now has some text describing attribution notice to the original work this work derives from.
66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
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// This work derives from Vittorio Romeo's code used for cppcon 2015 licensed under the Academic Free License.
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// His code is available here: https://github.com/SuperV1234/cppcon2015
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#ifndef EC_BITSET_HPP
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#define EC_BITSET_HPP
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#include <bitset>
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#include "Meta/TypeList.hpp"
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#include "Meta/Combine.hpp"
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#include "Meta/IndexOf.hpp"
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#include "Meta/ForEach.hpp"
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namespace EC
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{
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template <typename ComponentsList, typename TagsList>
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struct Bitset :
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public std::bitset<ComponentsList::size + TagsList::size>
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{
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using Combined = EC::Meta::Combine<ComponentsList, TagsList>;
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template <typename Component>
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constexpr auto getComponentBit() const
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{
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return (*this)[EC::Meta::IndexOf<Component, Combined>::value];
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}
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template <typename Component>
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constexpr auto getComponentBit()
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{
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return (*this)[EC::Meta::IndexOf<Component, Combined>::value];
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}
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template <typename Tag>
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constexpr auto getTagBit() const
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{
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return (*this)[EC::Meta::IndexOf<Tag, Combined>::value];
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}
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template <typename Tag>
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constexpr auto getTagBit()
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{
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return (*this)[EC::Meta::IndexOf<Tag, Combined>::value];
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}
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template <typename Contents>
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static constexpr Bitset<ComponentsList, TagsList> generateBitset()
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{
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Bitset<ComponentsList, TagsList> bitset;
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EC::Meta::forEach<Contents>([&bitset] (auto t) {
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if(EC::Meta::Contains<decltype(t), Combined>::value)
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{
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bitset[EC::Meta::IndexOf<decltype(t), Combined>::value] = true;
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}
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});
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return bitset;
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}
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};
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}
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#endif
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