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49 lines
1.6 KiB
49 lines
1.6 KiB
4 years ago
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#pragma once
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#include <cow.hpp>
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#include <utility>
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template<typename T>
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struct TypedCow : private Cow, public _cow_util::Span<T> {
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struct Fake;
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inline TypedCow(size_t sz) : TypedCow(sz, T()) {}
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template<typename... Args>
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inline TypedCow(size_t sz, Args&&... args) : TypedCow(sz, T(std::forward<Args>(args)...)) {}
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inline TypedCow(TypedCow<T>&& move) : Cow(std::move(move.super)) {
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unsigned char* bytes = this->as_bytes();
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for(size_t i=0;i<size();i++)
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new ((void*)(bytes + (sizeof(T)*i))) T(std::move(move[i]));
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}
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inline TypedCow(const TypedCow<T>& copy) : Cow(copy.super) {
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unsigned char* bytes = this->as_bytes();
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for(size_t i=0;i<size();i++)
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new ((void*)(bytes + (sizeof(T)*i))) T(copy[i]);
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}
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inline ~TypedCow() {
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unsigned char* bytes = this->as_bytes();
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for(size_t i=0;i<size();i++)
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reinterpret_cast<T*>(bytes + (sizeof(T)*i))->~T();
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}
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void* area() { return (*this).Cow::area(); }
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const void* area() const { return (*this).Cow::area(); }
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inline size_t size() const override { return (*this).Cow::size() / sizeof(T); }
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inline T& operator[](size_t i) { if (i>=size()) throw "idx"; else return *reinterpret_cast<T*>(this->as_bytes() + (sizeof(T) * i)); }
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inline const T& operator[](size_t i) const { if (i>=size()) throw "idx"; else return *reinterpret_cast<const T*>(this->as_bytes() + (sizeof(T) * i)); }
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private:
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inline explicit TypedCow(size_t sz, const T& copy_from) : Cow(sz * sizeof(T)) {
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unsigned char* bytes = this->as_bytes();
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for(size_t i=0;i<sz;i++)
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new ((void*)(bytes + (sizeof(T)*i))) T(copy_from);
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}
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};
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template<typename T>
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struct TypedCow<T>::Fake : private Cow::Fake, public _cow_util::Span<T> {
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};
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