Creates a function that finds the index of a regexp in a string.
Use regexp-position instead.
| arg | An instance of <string>. |
| byte-characters-only: | An instance of <object>. The default is #f. |
| need-marks: | An instance of <object>. The default is #t. |
| maximum-compile: | An instance of <object>. The default is #f. |
| case-sensitive: | An instance of <object>. The default is #f. |
| val | An instance of <function>. |