Example for T.122

[eisenwave]

T.122: Use templates (usually template aliases) to compute types at compile time

Example

template <size_t bits>
using int_least_bits_t = std::conditional_t<bits <= 32, int32_t, int64_t>;

int_least_bits_t<minimum_bits> x{ /* ... */ };

[jwakely]

Wouldn't the example be better with int_least32_t and int_least64_t which are guaranteed to exist on all platforms?

[eisenwave]

Wouldn't the example be better with int_least32_t and int_least64_t which are guaranteed to exist on all platforms?

Yes, that is a good point:

template <size_t bits>
using int_least_bits_t = std::conditional_t<bits <= 32, int_least32_t, int_least64_t>;

int_least_bits_t<minimum_bits> x{ /* ... */ };

[cubbimew]

would be neat to also show "Bad" example, except what is the implied alternative? Even old C++ std::char_traits and Loki::TypeTraits::UnConst were templates..

[eisenwave]

There isn't much of an alternative. You need templates to compute types. The only non-template solution that comes to mind is union.