Return T assumed to be pure.
Copied from: https://dlang.org/phobos/std_traits.html#SetFunctionAttributes.
https://forum.dlang.org/post/hmucolyghbomttqpsili@forum.dlang.org
See Implementation
Return T assumed to be pure.
Copied from: https://dlang.org/phobos/std_traits.html#SetFunctionAttributes.