Specifies that the type can be used as the template argument of std::valarray
.
for a type T
to be an NumericType:
T
cannot be a reference T
cannot be cv-qualified T
is a class, it operator&
T::T(const T&)
T& T::operator=(const T&)
or T& T::operator=(T)
T()
has the same effect as value-initialization T
may throw exceptions
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http://en.cppreference.com/w/cpp/named_req/NumericType