Function Perl_scan_word 

pub unsafe fn Perl_scan_word(
    my_perl: *mut PerlInterpreter,
    s: *mut c_char,
    dest: *mut c_char,
    destlen: STRLEN,
    allow_package: c_int,
    slp: *mut STRLEN,
) -> *mut c_char

thx shim for crate::Perl_scan_word.