public LexDocument Clone()
{
var result = new LexDocument();
foreach (var attrs in AttributeSets)
{
var d = new LexAttributeList();
result.AttributeSets.Add(attrs.Key, d);
foreach (var attr in attrs.Value)
{
d.Add(attr.Clone());
}
}
var ic = Rules.Count;
for (var i = 0; i < ic; ++i)
{
result.Rules.Add(Rules[i].Clone());
}
return(result);
}
internal static LexDocument Parse(ParseContext pc)
{
var result = new LexDocument();
while (-1 != pc.Current)
{
var line = pc.Line;
var column = pc.Column;
var position = pc.Position;
LexNode.SkipCommentsAndWhitespace(pc);
while ('\n' == pc.Current)
{
pc.Advance();
LexNode.SkipCommentsAndWhitespace(pc);
}
var id = LexNode.ParseIdentifier(pc);
if (string.IsNullOrEmpty(id))
{
pc.Advance();
LexNode.SkipCommentsAndWhitespace(pc);
continue;
}
LexNode.SkipCommentsAndWhitespace(pc);
pc.Expecting(':', '-', '=');
if (':' == pc.Current) // attribute set
{
pc.Advance();
var d = new LexAttributeList();
while (-1 != pc.Current && '\n' != pc.Current)
{
var attr = LexAttribute.Parse(pc);
d.Add(attr);
LexNode.SkipCommentsAndWhitespace(pc);
pc.Expecting('\n', ',', -1);
if (',' == pc.Current)
{
pc.Advance();
}
}
result.AttributeSets.Add(id, d);
LexNode.SkipCommentsAndWhitespace(pc);
}
else if ('=' == pc.Current)
{
pc.Advance();
LexNode.SkipCommentsAndWhitespace(pc);
pc.Expecting('\'');
pc.Advance();
var l = pc.CaptureBuffer.Length;
pc.TryReadUntil('\'', '\\', false);
pc.Expecting('\'');
pc.Advance();
var rx = pc.GetCapture(l);
// make sure to capture the line numbers properly:
var rpc = ParseContext.Create(rx);
rpc.EnsureStarted();
rpc.SetLocation(pc.Line, pc.Column, pc.Position);
var rule = new LexRule(id, RegexExpression.Parse(rpc));
rule.SetLocation(line, column, position);
result.Rules.Add(rule);
}
else if ('-' == pc.Current)
{
pc.TrySkipUntil('\n', true);
}
LexNode.SkipCommentsAndWhitespace(pc);
if ('\n' == pc.Current)
{
pc.Advance();
}
}
return(result);
}