private void Reduce(Token t, Text Text, Dictionary <Object, TextRange> TokenPositions, Dictionary <Object, TextRange> Positions)
{
var InnerNodes = Nodes.AsEnumerable().Reverse().TakeWhile(n => !(n.OnToken && (n.Token.Type.OnLeftParenthesis || n.Token.Type.OnComma))).Reverse().ToList();
var RangeStart = LineRangeStart;
if (Nodes.Count - InnerNodes.Count - 1 >= 0)
{
var LeftParenthesisOrComma = Nodes[Nodes.Count - InnerNodes.Count - 1].Token;
if (LeftParenthesisOrComma.Type.OnComma && (InnerNodes.Count == 0))
{
throw new InvalidSyntaxException("InvalidParenthesis", new FileTextRange {
Text = Text, Range = TokenPositions.ContainsKey(t) ? TokenPositions[t] : Firefly.Texting.TreeFormat.Optional <TextRange> .Empty
});
}
if (TokenPositions.ContainsKey(LeftParenthesisOrComma))
{
RangeStart = TokenPositions[LeftParenthesisOrComma];
}
}
foreach (var n in InnerNodes)
{
if (!n.OnNode)
{
throw new InvalidSyntaxException("InvalidSyntaxRule", new FileTextRange {
Text = Text, Range = TokenPositions.ContainsKey(n.Token) ? TokenPositions[n.Token] : Firefly.Texting.TreeFormat.Optional <TextRange> .Empty
});
}
}
if (InnerNodes.Count > 1)
{
var RangeEnd = Optional <TextRange> .Empty;
if (TokenPositions.ContainsKey(t))
{
RangeEnd = TokenPositions[t];
}
var Children = InnerNodes.Select(Part => Part.Node).ToList();
var Undetermined = new ExprNodeUndetermined {
Nodes = Children
};
var Node = ExprNode.CreateUndetermined(Undetermined);
if (RangeStart.OnSome && RangeEnd.OnSome)
{
Positions.Add(Undetermined, new TextRange {
Start = RangeStart.Value.Start, End = RangeEnd.Value.End
});
Positions.Add(Node, new TextRange {
Start = RangeStart.Value.Start, End = RangeEnd.Value.End
});
}
Nodes.RemoveRange(Nodes.Count - InnerNodes.Count, InnerNodes.Count);
Nodes.Add(StackNode.CreateNode(Node));
}
}
/// <summary>待定序列</summary>
public static ExprNode CreateUndetermined(ExprNodeUndetermined Value)
{
return(new ExprNode {
_Tag = ExprNodeTag.Undetermined, Undetermined = Value
});
}