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Class empty_struct¶

`class` empty_struct<tag> meta ¶

template <int tag>
struct empty_struct { … }

Empty type tagged with a unique integer tag .

Template parameters
tag	unique identifier distinguishing one empty field from another

struct S {
     KFR_NO_UNIQUE_ADDRESS empty_struct<0> a; // 0 bytes
     KFR_NO_UNIQUE_ADDRESS empty_struct<1> b; // 0 bytes
 };
 static_assert(sizeof(S) == 1); // both empty fields compacted away

Fully qualified name: kfr::empty_struct<tag>

Declared at meta.hpp:2353

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