impl Input for &[T] where T : Clone

[asibahi]

Hello.

This is not related to a specific issue, tho I thought to do this as an alternate implementation of #1810 , and I mentioned it in #1809 .

This generalizes Input implementation over any type that implements Clone. Which includes u8 as well as custom lexed Token types common in parsers.

My understanding is that any type that implements Copy, when clone() is called on it, just .. copies. No additional performance overhead. I would make this as a separate implementation from &[u8] but you'd run into specialization.

All the tests pass with no changes to them whatsoever.

[autumnull]

This would be really useful, I am currently writing a lexer and parser with nom and really don't want to write the boilerplate for this 😭