test coverage for std.regexp

[Don Clugston]

Walter Bright wrote:
> Don Clugston wrote:
>> std.regexp currently has very poor test coverage (about 50%).
> 
> I actually have a separate test suite for regexp, but it's under license 
> and so I cannot add it in to std.regexp. But with your permission, I can 
> add yours!

No problem. I hereby donate the code below to the public domain.

unittest {
     auto m = regexp.search("aBC r s", `bc\x20r[\40]s`, "i");
     assert(m.pre=="a");
     assert(m.match(0)=="BC r s");
     auto m2 = regexp.search("7xxyxxx", `^\d([a-z]{2})\D\1`);
     assert(m2.match(0)=="7xxyxx");
     // Just check the parsing.
     auto m3 = regexp.search("dcbxx", `ca|b[\d\]\D\s\S\w-\W]`);
     auto m4 = regexp.search("xy", `[^\ca-\xFa\r\n\b\f\t\v\0123]{2,485}$`);
     auto m5 = regexp.search("xxx", `^^\r\n\b{13,}\f{4}\t\v\u02aF3a\w\W`);
     auto m6 = regexp.search("xxy", `.*y`);
     assert(m6.match(0)=="xxy");
     auto m7 = regexp.search("QWDEfGH", "(ca|b|defg)+", "i");
     assert(m7.match(0)=="DEfG");
     auto m8 = regexp.search("dcbxx", `a?\B\s\S`);
     auto m9 = regexp.search("dcbxx", `[-w]`);
     auto m10 = regexp.search("dcbsfd", 
`aB[c-fW]dB|\d|\D|\u012356|\w|\W|\s|\S`, "i");
     auto m11 = regexp.search("dcbsfd", `[]a-]`);
     m.replaceOld(`a&b\1c`);
     m.replace(`a$&b$'$1c`);
}