c++ - negation of std::integral_constant -



c++ - negation of std::integral_constant<bool> -

sorry asking simple question, cannot find reply easily. google says nil interesting "c++ negation integral_constant" , similar queries.

is there in c++11 trait create std::true_type std::false_type , vice versa? in other words, i'd more readeble version of

std::is_same<my_static_bool, std::false_type>

i know of course of study can write myself, i'd utilize existing 1 if there such.

there not, because it's one-liner , <type_traits> should little possible.

template <typename t> using static_not = std::integral_constant<bool, !t::value>;

usage:

static_not<my_static_bool>

this right way because standard says "false_type or derived such", can't depend on beingness equal std::false_type. relax "having constexpr boolean ::value property" because don't utilize tag dispatching.

c++ c++11 template-meta-programming typetraits boost-mpl

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