On Thursday, 2 March 2017 at 01:44:19 UTC, Andrei Alexandrescu
wrote:
May be worth discussing in here:
https://issues.dlang.org/show_bug.cgi?id=17238 -- Andrei
I don't understand the use case. PR #5153 seems to be about
getting the last element, not about some lookahead. When I think
about lookahead, I always think of parsers. If the lexer provides
an input range of tokens, my recursive descent parser might need
3 tokens lookahead, for example. For the lexer input a "push back
a character into my input" is more convenient.
Should it give some performance guarantees? I guess, we don't
want to refresh the buffers at every popFront, so it would
probably be as lazy as possible.
