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danlark1/union_hack.h

Created January 11, 2020 23:26
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union_hack.h
struct empty_struct {};
struct dummy_type {
static_assert(sizeof(T) % sizeof(empty_struct) == 0, "");
// Use an array to avoid GCC 6 placement-new warning.
empty_struct data[sizeof(T) / sizeof(empty_struct)];
};
// Data storage
union {
T data_;
dummy_type dummy_;
};
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