mirror of https://github.com/PrimeDecomp/prime.git
58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
#ifndef _RSTL_OPTIONAL_OBJECT_HPP
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#define _RSTL_OPTIONAL_OBJECT_HPP
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#include "types.h"
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#include "rstl/construct.hpp"
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namespace rstl {
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template < typename T >
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class optional_object {
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public:
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optional_object() : m_valid(false) {}
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optional_object(const T& item) : m_valid(true) { rstl::construct< T >(m_data, item); }
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optional_object(const optional_object& other) : m_valid(other.m_valid) {
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if (other.m_valid) {
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rstl::construct< T >(m_data, other.data());
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}
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}
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~optional_object() { clear(); }
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optional_object& operator=(const T& item) {
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assign(item);
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return *this;
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}
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T& data() { return *get_ptr(); }
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const T& data() const { return *get_ptr(); }
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T* get_ptr() { return reinterpret_cast< T* >(m_data); }
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const T* get_ptr() const { return reinterpret_cast< const T* >(m_data); }
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bool valid() const { return m_valid; }
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operator bool() const { return m_valid; } // replace with valid()?
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void clear() {
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if (m_valid) {
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rstl::destroy(get_ptr());
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}
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m_valid = false;
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}
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T& operator*() { return data(); }
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T* operator->() { return data(); }
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private:
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u8 m_data[sizeof(T)];
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bool m_valid;
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void assign(const T& item) {
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if (!m_valid) {
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rstl::construct(get_ptr(), item);
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m_valid = true;
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} else {
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data() = item;
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}
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}
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};
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} // namespace rstl
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#endif
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