public T ParseSingleSegment <T>(string pattern) where T : Segment
{
if (pattern == "")
{
throw new ArgumentException("Pattern is empty.", nameof(pattern));
}
var context = new ParseContext(pattern);
var tokens = new GlobPathTokeniser().Tokenise(context).ToArray();
var segments = new GlobPathParser(Variables.ToArray()).Parse(context, tokens).ToArray();
if (segments.Length != 1)
{
throw new ArgumentException($"Pattern parsed as {segments.Length} segments.", nameof(pattern));
}
return(segments.Single() as T ?? throw new ArgumentException($"Pattern parsed as a segment of type {segments.Single().GetType()} segments.", nameof(pattern)));
}
public Glob Parse(string pattern)
{
if (pattern.TrimStart() != pattern)
{
throw new ArgumentException("Leading whitespace is not permitted.", nameof(pattern));
}
var rootContext = new ParseContext(pattern);
var root = TryParseRoot(rootContext, out var offset);
var pathPattern = pattern.Substring(offset);
if (pathPattern == "")
{
return(new Glob(root, new Segment[0]));
}
var context = new ParseContext(pathPattern);
var tokens = new GlobPathTokeniser().Tokenise(context).ToArray();
var segments = new GlobPathParser(Variables.ToArray()).Parse(context, tokens).ToArray();
return(new Glob(root, segments));
}
