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BAN: Optional can now be constructed from another Optional 

Also fix bug in release_value() where we did not call the
destructor.
This commit is contained in:
Bananymous 2023-10-11 19:39:10 +03:00
parent 521513bed2
commit d2cfc843e4
1 changed files with 42 additions and 26 deletions
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68
BAN/include/BAN/Optional.h
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@ -13,6 +13,8 @@ namespace BAN
{
public:
Optional();
Optional(Optional&&);
Optional(const Optional&);
Optional(const T&);
Optional(T&&);
template<typename... Args>
@ -20,8 +22,8 @@ namespace BAN
~Optional();
Optional& operator=(const Optional&);
Optional& operator=(Optional&&);
Optional& operator=(const Optional&);
template<typename... Args>
Optional& emplace(Args&&...);
@ -34,9 +36,9 @@ namespace BAN
bool has_value() const;
T&& release_value();
const T& value() const;
T release_value();
T& value();
const T& value() const;
void clear();
@ -50,6 +52,22 @@ namespace BAN
: m_has_value(false)
{}
template<typename T>
Optional<T>::Optional(Optional<T>&& other)
: m_has_value(other.has_value())
{
if (other.has_value())
new (m_storage) T(move(other.release_value()));
}
template<typename T>
Optional<T>::Optional(const Optional<T>& other)
: m_has_value(other.has_value())
{
if (other.has_value())
new (m_storage) T(other.value());
}
template<typename T>
Optional<T>::Optional(const T& value)
: m_has_value(true)
@ -61,7 +79,7 @@ namespace BAN
Optional<T>::Optional(T&& value)
: m_has_value(true)
{
new (m_storage) T(BAN::move(value));
new (m_storage) T(move(value));
}
template<typename T>
@ -69,7 +87,7 @@ namespace BAN
Optional<T>::Optional(Args&&... args)
: m_has_value(true)
{
new (m_storage) T(BAN::forward<Args>(args)...);
new (m_storage) T(forward<Args>(args)...);
}
template<typename T>
@ -79,26 +97,22 @@ namespace BAN
}
template<typename T>
Optional<T>& Optional<T>::operator=(const Optional& other)
Optional<T>& Optional<T>::operator=(Optional&& other)
{
clear();
m_has_value = other.has_value();
if (other.has_value())
{
m_has_value = true;
new (m_storage) T(other.value());
}
new (m_storage) T(move(other.release_value()));
return *this;
}
template<typename T>
Optional<T>& Optional<T>::operator=(Optional&& other)
Optional<T>& Optional<T>::operator=(const Optional& other)
{
clear();
if (other.has_value())
{
m_has_value = true;
new (m_storage) T(BAN::move(other.release_value()));
}
m_has_value = other.has_value();
if (other.has_value)
new (m_storage) T(other.value());
return *this;
}
@ -108,7 +122,7 @@ namespace BAN
{
clear();
m_has_value = true;
new (m_storage) T(BAN::forward<Args>(args)...);
new (m_storage) T(forward<Args>(args)...);
return *this;
}
@ -147,18 +161,13 @@ namespace BAN
}
template<typename T>
T&& Optional<T>::release_value()
T Optional<T>::release_value()
{
ASSERT(has_value());
T released_value = move(value());
value().~T();
m_has_value = false;
return BAN::move((T&)m_storage);
}
template<typename T>
const T& Optional<T>::value() const
{
ASSERT(has_value());
return (const T&)m_storage;
return move(released_value);
}
template<typename T>
@ -168,6 +177,13 @@ namespace BAN
return (T&)m_storage;
}
template<typename T>
const T& Optional<T>::value() const
{
ASSERT(has_value());
return (const T&)m_storage;
}
template<typename T>
void Optional<T>::clear()
{