Named capture group introspection not exposed by the C API

[davidblewett]

The C API exposes an iterator over all captures (rure_iter_next_captures), and can return the index of a given capture group name (rure_capture_name_index). The Rust Regex struct has a capture_names iterator, but that doesn't appear to be exposed at the C level.

I don't see a way to retrieve the capture group name while iterating over the set of captures (i.e., given the index of a particular capture give me the corresponding name, hypothetically rure_capture_index_name), or to return the list of capture group names (rure_iter_capture_groups, for example).

[BurntSushi]

Ah yup, it looks like exposing the capture_names iterator in some form in the C API should fix this.

[davidblewett]

I came upon this while working on Python bindings ( current WIP here: https://github.com/rust-lang-nursery/regex/compare/master...davidblewett:rure-python?expand=1 ). I wanted to implement the groupdict method, similar to Python's re.MatchObject: https://docs.python.org/2/library/re.html#re.MatchObject.groupdict .

I'm new to Rust, and have never really used C. I can take a crack at it some time this week.

[BurntSushi]

@davidblewett That'd be awesome! I'm not a C expert either but I'd be happy to help mentor you if you'd like. I'm on IRC in the evenings during the week.

[BurntSushi]

Fixed in #282