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Reorganise union members since this appears to help GCC optimize default construction

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This commit is contained in:
Simon Brand
2019-03-26 14:56:22 +00:00
parent 32b343b866
commit 199b5267fe
1 changed files with 6 additions and 6 deletions
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12
tl/expected.hpp
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@@ -388,9 +388,9 @@ struct expected_storage_base {
}
}
union {
char m_no_init;
T m_val;
unexpected<E> m_unexpect;
char m_no_init;
};
bool m_has_val;
};
@@ -429,9 +429,9 @@ template <class T, class E> struct expected_storage_base<T, E, true, true> {
~expected_storage_base() = default;
union {
char m_no_init;
T m_val;
unexpected<E> m_unexpect;
char m_no_init;
};
bool m_has_val;
};
@@ -475,9 +475,9 @@ template <class T, class E> struct expected_storage_base<T, E, true, false> {
}
union {
char m_no_init;
T m_val;
unexpected<E> m_unexpect;
char m_no_init;
};
bool m_has_val;
};
@@ -519,9 +519,9 @@ template <class T, class E> struct expected_storage_base<T, E, false, true> {
}
}
union {
char m_no_init;
T m_val;
unexpected<E> m_unexpect;
char m_no_init;
};
bool m_has_val;
};
@@ -550,8 +550,8 @@ template <class E> struct expected_storage_base<void, E, false, true> {
~expected_storage_base() = default;
struct dummy {};
union {
dummy m_val;
unexpected<E> m_unexpect;
dummy m_val;
};
bool m_has_val;
};
@@ -584,8 +584,8 @@ template <class E> struct expected_storage_base<void, E, false, false> {
}
union {
char m_dummy;
unexpected<E> m_unexpect;
char m_dummy;
};
bool m_has_val;
};