Add a member names callback for ParseCallbacks

[chayleaf]

I'm new to both rust and bindgen, so please tell me if there's something I'm doing wrong here, but at least it works

[chayleaf]

just found a bug in test generation, don't merge yet

[chayleaf]

hopefully should be good now

[emilio]

Can you elaborate on what the use case for this is?

Also, this would need some tests, see the bindgen-integration directory for examples.

[chayleaf]

Use case is similar to the item_name callback. I personally used it to snake case'ify every member function in the bindings. As of tests - there aren't any tests for ParseCallbacks in the first place, and I can't run the test suite as I'm using Windows.

[emilio]

There definitely are tests for parse callbacks:

rust-bindgen/bindgen-integration/build.rs

Line 17 in de23676

impl ParseCallbacks for MacroCallback {

[kulp]

@pavlukivan, maybe my concurrent work in #1793 will be helpful to you ? I added some tests there (although I do not know if I did it well, since my code is still pending review).

[chayleaf]

I see, I couldn't find the test because it wasn't using expectations. I'll see what I can do.

[chayleaf]

i don't need this anymore so I will close this and let others do it if the need arises