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Use a named struct Empty in optional

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This commit is contained in:
Maxime Coste 2015-07-10 19:05:21 +01:00
parent 1d1927647a
commit a15d816ea8
1 changed files with 2 additions and 1 deletions
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3
src/optional.hh
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@ -80,9 +80,10 @@ public:
private: private:
void destruct_ifn() { if (m_valid) m_value.~T(); } void destruct_ifn() { if (m_valid) m_value.~T(); }
struct Empty {};
union union
{ {
struct {} m_empty; // disable default construction of value Empty m_empty; // disable default construction of value
T m_value; T m_value;
}; };
bool m_valid; bool m_valid;