Is it possible to use a pointer as a template argument?

Asked Jan 20 '20 at 14:08

Active Jan 20 '20 at 14:08

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Since it's possible to use primitive types as template arguments, I was wondering if it was possible for a pointer type?

In my mind it makes no sense since a fixed pointer can't exist, so the compiler shouldn't be able to construct the assembly for such templates but I might be surprised!

Example:

template <FILE *stream = stdout>
class A;

asked Jan 20 '20 at 14:08

Nathanael Demacon

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At the very least you can provide `nullptr` as a pointer template argument. This is a real use case with `std::enable_if`. – François Andrieux Jan 20 '20 at 14:13
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Also related: https://stackoverflow.com/questions/13220502/uses-of-pointers-non-type-template-parameters – NathanOliver Jan 20 '20 at 14:13

Is it possible to use a pointer as a template argument?

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