public void CanMatchRegexStartingFromGivenCharacterPosition()
{
var regex = new TokenRegex(@"[a-z]+");
regex.Match("123abc0", 0).Success.ShouldBeFalse();
regex.Match("123abc0", 3).Success.ShouldBeTrue();
regex.Match("123abc0", 3).Value.ShouldEqual("abc");
regex.Match("123abc0", 4).Success.ShouldBeTrue();
regex.Match("123abc0", 4).Value.ShouldEqual("bc");
}
public void CanMatchMultilineAndCommentedRegexes()
{
var regex = new TokenRegex(
@" [a-z]+ # Just Lower
| [A-Z]+ # Just Upper
| [0-9]+ # Just Digit");
regex.Match("123Abc", 1).Value.ShouldEqual("23");
regex.Match("$23ab!", 0).Success.ShouldBeFalse();
regex.Match("$23ab!", 1).Value.ShouldEqual("23");
regex.Match("$23ab!", 3).Value.ShouldEqual("ab");
}
public Pattern(string name, string pattern, bool skippable, params RegexOptions[] regexOptions)
: base(name, skippable)
{
regex = new TokenRegex(pattern, regexOptions);
}
public void CanMatchLeadingCharactersByTokenRegex()
{
var end = new TokenRegex(@"$");
var letters = new TokenRegex(@"[a-z]+");
var digits = new TokenRegex(@"[0-9]+");
var alphanumerics = new TokenRegex(@"[a-z0-9]+");
var empty = new Text("");
empty.Match(letters).ShouldFail();
empty.Match(end).ShouldSucceed("");
var abc123 = new Text("abc123");
abc123.Match(digits).ShouldFail();
abc123.Match(letters).ShouldSucceed("abc");
abc123.Match(alphanumerics).ShouldSucceed("abc123");
abc123.Advance(2).Match(digits).ShouldFail();
abc123.Advance(2).Match(letters).ShouldSucceed("c");
abc123.Advance(2).Match(alphanumerics).ShouldSucceed("c123");
abc123.Advance(3).Match(digits).ShouldSucceed("123");
abc123.Advance(3).Match(letters).ShouldFail();
abc123.Advance(3).Match(alphanumerics).ShouldSucceed("123");
abc123.Advance(6).Match(digits).ShouldFail();
abc123.Advance(6).Match(letters).ShouldFail();
abc123.Advance(6).Match(alphanumerics).ShouldFail();
}
public Pattern(string name, string pattern, bool skippable = false)
: base(name, skippable)
{
regex = new TokenRegex(pattern);
}
public MatchResult Match(TokenRegex regex)
{
return regex.Match(input, index);
}
public Pattern(string name, string pattern, bool skippable, params RegexOptions[] regexOptions)
: base(name, skippable)
{
regex = new TokenRegex(pattern, regexOptions);
}
public MatchResult Match(TokenRegex regex)
{
return(regex.Match(input, index));
}