internal Directive ParseDirective(string line)
{
DirectiveComponents components;
DirectiveHandler handler;
Directive directive;
if (DirectiveComponents.TryParse(line, out components) && _directiveParsers.TryGetValue(components.Key, out handler) && handler.TryParse(components, out directive))
{
if (directive is StartOfTabDirective)
{
_isInTab = true;
}
if (directive is EndOfTabDirective)
{
_isInTab = false;
}
return(directive);
}
else
{
throw new FormatException($"Invalid directive at line {_lineNumber}.");
}
}
public static bool TryParse(string s, out DirectiveComponents components)
{
Match match = _directiveRegex.Match(s);
if (match == null || string.IsNullOrWhiteSpace(match.Groups["key"].Value))
{
components = null;
return(false);
}
components = new DirectiveComponents(
key: match.Groups["key"]?.Value.ToLower().Trim(),
subKey: match.Groups["subkey"]?.Value.Trim(),
value: match.Groups["value"]?.Value.Trim());
return(true);
}
