Left recursive checks

[zesterer]

No description provided.

[m-hugo]

false positive? this https://github.com/m-hugo/hugoc/tree/f39632f5f9d1d1bb658d051764cf38eabd2b3018
panics on debug but runs fine on release (except for a surprising found end of input expected something else before the actual end of the file)
slapping a dozen memoized in other places doesn't remove that Recursive parser defined at src/main.rs:43:9 is left-recursive. Consider using .memoized() or restructuring this parser to be right-recursive.

[zesterer]

false positive?

Yep, this is why this isn't merged yet. The check assumes that parsers are functionally pure, but .memoized() messes with this assumption for implementation reasons. I've yet to come up with a reliable and efficient way around it. When I do, I'll try to get this merged.