Static assert in template parameters

Question

I would like to ask if it is possible to insert static assert into template parameters.

Let´s say I want to create class StaticArray<T,N> and I want to make it impossible for users to instantiate this class with size equal to 0. Is there any way to insert something like static_assert(N != 0, "error message") into my class?

You probably want to assert that the size is _greater_ than zero, not inequal. — Mooing Duck, Sep 10 '14 at 19:35

score 6 · Answer 1 · answered Sep 10 '14 at 19:30

6

template <typename T, std::size_t N>
class StaticArray
{
    static_assert(N != 0, "error message");
};

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answered Sep 10 '14 at 19:30

Piotr Skotnicki

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Static assert in template parameters

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