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ETLCPP / etl

Embedded Template Library
https://www.etlcpp.com
MIT License
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Feature request: Implement equivalent for std::type_identity<T> in <etl/type_traits.h> #904

Closed tigran2008 closed 2 weeks ago

tigran2008 commented 2 weeks ago

std::type_identity was added in C++20 as a way to escape type deduction in templated arguments. https://en.cppreference.com/w/cpp/types/type_identity

Manually implementing it like this seems to work, and although it's just a few lines, it'd be nice if it was built-in.

template <typename T>
struct type_identity { typedef T type; };

#if ETL_USING_CPP11
  template <typename T>
  using type_identity_t = typename type_identity<T>::type;
#endif
jwellbelove commented 2 weeks ago

Do you want to do a Pull Request?

tigran2008 commented 2 weeks ago

Would I add it to etl/generators/type_traits_generator.h?

jwellbelove commented 2 weeks ago

Yes, and then run the generator script generate_type_traits.bat

tigran2008 commented 2 weeks ago

Alright, cool! I'm installing cogapp right now that's why it's taking some time. 😅

tigran2008 commented 2 weeks ago

There we go: https://github.com/ETLCPP/etl/pull/905