64 lines
1.1 KiB
Plaintext
64 lines
1.1 KiB
Plaintext
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namespace seafire::common
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{
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/// Use an extension of type E.
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///
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template<typename E>
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E&
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extension_context_t::
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use()
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{
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static std::type_index const key{typeid(E)};
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return *(static_cast<E*>(use(key)));
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}
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/// Use an extension of type E.
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///
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template<typename E>
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E const&
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extension_context_t::
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use() const
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{
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static std::type_index const key{typeid(E)};
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return *(static_cast<E*>(use(key)));
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}
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/// Add an extension to this context.
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///
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template<typename E>
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void
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extension_context_t::
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extend(E* ptr)
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{
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static std::type_index const key{typeid(E)};
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extend(key, ptr);
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}
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/// Erase an extension from this context.
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///
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template<typename E>
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void
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extension_context_t::
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erase()
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{
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static std::type_index const key{typeid(E)};
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erase_extension(key);
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}
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template<typename E>
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extend_t<E>::
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extend_t(extension_context_t& target, extension_type& ext)
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: target_{target}
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{
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target.extend(&ext);
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}
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template<typename E>
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extend_t<E>::
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~extend_t() noexcept
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{
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target_.erase<extension_type>();
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}
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} // namespace seafire::common
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