Remove a regex-related script

This file was probably forgotten when libregex moved out of tree. The rust-lang-nursery/regex repo has a nigh-identical file in its script/ folder.

src/etc/regex-match-tests.py

@@ -1,109 +0,0 @@
-#!/usr/bin/env python2
-
-# Copyright 2014 The Rust Project Developers. See the COPYRIGHT
-# file at the top-level directory of this distribution and at
-# http://rust-lang.org/COPYRIGHT.
-#
-# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-# option. This file may not be copied, modified, or distributed
-# except according to those terms.
-
-from __future__ import absolute_import, division, print_function
-import argparse
-import datetime
-import os.path as path
-
-
-def print_tests(tests):
-    print('\n'.join([test_tostr(t) for t in tests]))
-
-
-def read_tests(f):
-    basename, _ = path.splitext(path.basename(f))
-    tests = []
-    for lineno, line in enumerate(open(f), 1):
-        fields = filter(None, map(str.strip, line.split('\t')))
-        if not (4 <= len(fields) <= 5) \
-           or 'E' not in fields[0] or fields[0][0] == '#':
-            continue
-
-        opts, pat, text, sgroups = fields[0:4]
-        groups = []  # groups as integer ranges
-        if sgroups == 'NOMATCH':
-            groups = [None]
-        elif ',' in sgroups:
-            noparen = map(lambda s: s.strip('()'), sgroups.split(')('))
-            for g in noparen:
-                s, e = map(str.strip, g.split(','))
-                if s == '?' and e == '?':
-                    groups.append(None)
-                else:
-                    groups.append((int(s), int(e)))
-        else:
-            # This skips tests that should result in an error.
-            # There aren't many, so I think we can just capture those
-            # manually. Possibly fix this in future.
-            continue
-
-        if pat == 'SAME':
-            pat = tests[-1][1]
-        if '$' in opts:
-            pat = pat.decode('string_escape')
-            text = text.decode('string_escape')
-        if 'i' in opts:
-            pat = '(?i)%s' % pat
-
-        name = '%s_%d' % (basename, lineno)
-        tests.append((name, pat, text, groups))
-    return tests
-
-
-def test_tostr(t):
-    lineno, pat, text, groups = t
-    options = map(group_tostr, groups)
-    return 'mat!{match_%s, r"%s", r"%s", %s}' \
-           % (lineno, pat, '' if text == "NULL" else text, ', '.join(options))
-
-
-def group_tostr(g):
-    if g is None:
-        return 'None'
-    else:
-        return 'Some((%d, %d))' % (g[0], g[1])
-
-
-if __name__ == '__main__':
-    parser = argparse.ArgumentParser(
-        description='Generate match tests from an AT&T POSIX test file.')
-    aa = parser.add_argument
-    aa('files', nargs='+',
-       help='A list of dat AT&T POSIX test files. See src/libregexp/testdata')
-    args = parser.parse_args()
-
-    tests = []
-    for f in args.files:
-        tests += read_tests(f)
-
-    tpl = '''// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// ignore-tidy-linelength
-
-// DO NOT EDIT. Automatically generated by 'src/etc/regexp-match-tests'
-// on {date}.
-'''
-    print(tpl.format(date=str(datetime.datetime.now())))
-
-    for f in args.files:
-        print('// Tests from %s' % path.basename(f))
-        print_tests(read_tests(f))
-        print('')