Function onig_sys::onig_set_progress_callout_of_match_param

pub unsafe extern "C" fn onig_set_progress_callout_of_match_param(
    mp: *mut OnigMatchParam, 
    f: OnigCalloutFunc
) -> c_int

Set a function for callouts of contents in progress. If 0 (NULL) is set, never called in progress.

arguments 1 mp: match-param pointer 2 f: function

normal return: ONIG_NORMAL