public bool Equals(XbnfConcatExpression rhs)
{
if (ReferenceEquals(rhs, this))
{
return(true);
}
if (ReferenceEquals(rhs, null))
{
return(false);
}
return(Left == rhs.Left && Right == rhs.Right);
}
public XbnfConcatExpression(XbnfExpression left, params XbnfExpression[] right)
{
Left = left;
for (int i = 0; i < right.Length; i++)
{
var r = right[i];
if (null == Right)
{
Right = r;
}
var c = new XbnfConcatExpression();
c.Left = Left;
c.Right = Right;
Right = null;
Left = c;
}
}
static IList <IList <string> > _GetDysConcat(XbnfDocument d, ICollection <string> syms, IDictionary <XbnfExpression, string> tmap, IDictionary <string, XbnfAttributeList> attrs, IList <KeyValuePair <string, IList <string> > > rules, XbnfProduction p, XbnfConcatExpression ce)
{
var l = new List <IList <string> >();
if (null == ce.Right)
{
if (null == ce.Left)
{
return(l);
}
foreach (var ll in _GetDysjunctions(d, syms, tmap, attrs, rules, p, ce.Left))
{
l.Add(new List <string>(ll));
}
return(l);
}
else if (null == ce.Left)
{
foreach (var ll in _GetDysjunctions(d, syms, tmap, attrs, rules, p, ce.Right))
{
l.Add(new List <string>(ll));
}
return(l);
}
foreach (var ll in _GetDysjunctions(d, syms, tmap, attrs, rules, p, ce.Left))
{
foreach (var ll2 in _GetDysjunctions(d, syms, tmap, attrs, rules, p, ce.Right))
{
var ll3 = new List <string>();
ll3.AddRange(ll);
ll3.AddRange(ll2);
if (!l.Contains(ll3, OrderedCollectionEqualityComparer <string> .Default))
{
l.Add(ll3);
}
}
}
return(l);
}
internal static XbnfExpression Parse(LexContext pc)
{
XbnfExpression current = null;
XbnfExpression e;
long position;
int line;
int column;
pc.TrySkipCCommentsAndWhiteSpace();
position = pc.Position; line = pc.Line; column = pc.Column;
while (-1 != pc.Current && ']' != pc.Current && ')' != pc.Current && '}' != pc.Current && ';' != pc.Current && ':' != pc.Current)
{
pc.TrySkipCCommentsAndWhiteSpace();
position = pc.Position; line = pc.Line; column = pc.Column;
switch (pc.Current)
{
case '|':
pc.Advance();
position = pc.Position; line = pc.Line; column = pc.Column;
current = new XbnfOrExpression(current, Parse(pc));
current.SetLocation(line, column, position);
break;
case '(':
pc.Advance();
position = pc.Position; line = pc.Line; column = pc.Column;
e = Parse(pc);
if (null != current)
{
current.SetLocation(line, column, position);
}
pc.Expecting(')');
pc.Advance();
e.SetLocation(line, column, position);
if (null == current)
{
current = e;
}
else
{
current = new XbnfConcatExpression(current, e);
}
break;
case '[':
pc.Advance();
e = new XbnfOptionalExpression(Parse(pc));
e.SetLocation(line, column, position);
pc.TrySkipCCommentsAndWhiteSpace();
pc.Expecting(']');
pc.Advance();
if (null == current)
{
current = e;
}
else
{
current = new XbnfConcatExpression(current, e);
}
break;
case '{':
pc.Advance();
e = new XbnfRepeatExpression(Parse(pc));
e.SetLocation(line, column, position);
pc.TrySkipCCommentsAndWhiteSpace();
pc.Expecting('}');
pc.Advance();
if ('+' == pc.Current)
{
pc.Advance();
((XbnfRepeatExpression)e).IsOptional = false;
}
if (null == current)
{
current = e;
}
else
{
current = new XbnfConcatExpression(current, e);
}
break;
case '\"':
e = new XbnfLiteralExpression(pc.ParseJsonString());
if (null == current)
{
current = e;
}
else
{
current = new XbnfConcatExpression(current, e);
}
e.SetLocation(line, column, position);
break;
case '\'':
pc.Advance();
pc.ClearCapture();
pc.TryReadUntil('\'', '\\', false);
pc.Expecting('\'');
pc.Advance();
e = new XbnfRegexExpression(pc.GetCapture());
if (null == current)
{
current = e;
}
else
{
current = new XbnfConcatExpression(current, e);
}
e.SetLocation(line, column, position);
break;
case ';':
case ']':
case ')':
case '}':
case '=':
case ':':
return(current);
default:
e = new XbnfRefExpression(ParseIdentifier(pc));
if (null == current)
{
current = e;
}
else
{
current = new XbnfConcatExpression(current, e);
}
e.SetLocation(line, column, position);
break;
}
}
pc.TrySkipCCommentsAndWhiteSpace();
return(current);
}