Template Function t8_hidden_functions::unrolled_for_impl

Function Documentation

template<std::size_t first, std::size_t last, typename TFunction>
constexpr void t8_hidden_functions::unrolled_for_impl(TFunction &&body)

Implementation of a compile-time unrolled for.

Has 0 runtime overhead compared to normal loops. Index can be used in compile-time contexts like array length or template arguments.

Usage: int x = 1 unrolled_for<0, 3>([&](auto loop_count) { do_something<loop_count>(x); }; expands to: do_something<0>(x); do_something<1>(x); do_something<2>(x);

Template Parameters:

  • first – Starting variable, has to be an integer

  • last – Ending variable, has to be an integer (last iteration is iter < last)

  • TFunction – Body of the for loop as a lambda function.

Parameters:

body – [in] The body of the loop as a lambda function.