26           , L("abba1234abba")  in get_test_cases()
28           , backrefs(L("1234"), nilbr)  in get_test_cases()
33           , L("1234abba1234")  in get_test_cases()
35           , backrefs(L("abba"), nilbr)  in get_test_cases()
40           , L("abba1234abba")  in get_test_cases()
42           , backrefs(L("1234"), nilbr)  in get_test_cases()
47           , L("1234abba1234")  in get_test_cases()
49           , backrefs(L("abba"), nilbr)  in get_test_cases()
54           , L("abba1234abba")  in get_test_cases()
56           , backrefs(L("1234"), nilbr)  in get_test_cases()
61           , L("1234abba1234")  in get_test_cases()
63           , backrefs(L("abba"), nilbr)  in get_test_cases()
68           , L("1234abba1234")  in get_test_cases()
70           , backrefs(L("abba"), nilbr)  in get_test_cases()
75           , L("1234(.;)abba")  in get_test_cases()
77           , backrefs(L("(.;)"), nilbr)  in get_test_cases()
82           , L("(boo[bar]baz)")  in get_test_cases()
83 …, regex_type((s1= L('(') >> (s2= nil) | L('[') >> (s3= nil)) >> -*_ >> (s4= L(')') >> s2 | L(']') …  in get_test_cases()
84           , backrefs(L("(boo[bar]baz)"), L("("), L(""), L(""), L(")"), nilbr)  in get_test_cases()
89           , L("[boo(bar)baz]")  in get_test_cases()
90 …, regex_type((s1= L('(') >> (s2= nil) | L('[') >> (s3= nil)) >> -*_ >> (s4= L(')') >> s2 | L(']') …  in get_test_cases()
91           , backrefs(L("[boo(bar)baz]"), L("["), L(""), L(""), L("]"), nilbr)  in get_test_cases()
96           , L("[boo[bar]baz]")  in get_test_cases()
97 …, regex_type((s1= L('(') >> (s2= nil) | L('[') >> (s3= nil)) >> -*_ >> (s4= L(')') >> s2 | L(']') …  in get_test_cases()
98           , backrefs(L("[boo[bar]"), L("["), L(""), L(""), L("]"), nilbr)  in get_test_cases()
103           , L("foobarfoo")  in get_test_cases()
104           , regex_type(after(L("foo")) >> L("bar"))  in get_test_cases()
105           , backrefs(L("bar"), nilbr)  in get_test_cases()
110           , L("foobarfoo")  in get_test_cases()
111           , regex_type(after(s1= L('f') >> _ >> L('o')) >> L("bar"))  in get_test_cases()
112           , backrefs(L("bar"), L("foo"), nilbr)  in get_test_cases()
117           , L("foOoo")  in get_test_cases()
118           , regex_type(icase(after(s1= L("fo")) >> L('o')))  in get_test_cases()
119           , backrefs(L("O"), L("fo"), nilbr)  in get_test_cases()
124           , L("fOooo")  in get_test_cases()
125           , regex_type(icase(~after(s1= L("fo")) >> L('o')))  in get_test_cases()
126           , backrefs(L("O"), L(""), nilbr)  in get_test_cases()
131           , L("12foo12")  in get_test_cases()
133           , backrefs(L("foo"), nilbr)  in get_test_cases()
138           , L(";12foo12;")  in get_test_cases()
140           , backrefs(L("12foo12"), nilbr)  in get_test_cases()
145           , L("aaaa")  in get_test_cases()
146           , regex_type(after(s1= nil) >> L('a'))  in get_test_cases()
147           , backrefs(L("a"), L(""), nilbr)  in get_test_cases()
152           , L("ABCabc123foo")  in get_test_cases()
153           , regex_type(after(s1= L("abc") >> repeat<3>(_d)) >> L("foo"))  in get_test_cases()
154           , backrefs(L("foo"), L("abc123"), nilbr)  in get_test_cases()