public static Either <ParseException, Pair <List <IToken>, AssignmentNode> > Parse(List <IToken> tokens, IScopedTable <IEntityType, string> parentTypeTable)
{
Console.WriteLine("AssignmentNode");
var maybeModifiablePrimary = ModifiablePrimaryNode.Parse(tokens, parentTypeTable);
if (maybeModifiablePrimary.IsLeft)
{
return(maybeModifiablePrimary.LeftToList()[0]);
}
tokens = maybeModifiablePrimary.RightToList()[0].First;
if (tokens.Count < 1)
{
return(NotAnAssignmentNodeException);
}
if (!(tokens[0] is AssignmentOperatorToken))
{
return(NotAnAssignmentNodeException);
}
tokens = tokens.Skip(1).ToList();
var maybeExpression = ExpressionNode.Parse(tokens, parentTypeTable);
if (maybeExpression.IsLeft)
{
return(maybeExpression.LeftToList()[0]);
}
tokens = maybeExpression.RightToList()[0].First;
while (tokens.Count > 0)
{
if (tokens[0] is NewLineSymbolToken || tokens[0] is CommentToken ||
tokens[0] is SemicolonSymbolToken)
{
tokens = tokens.Skip(1).ToList();
}
else
{
break;
}
}
return(new Pair <List <IToken>, AssignmentNode>(tokens, new AssignmentNode(
maybeModifiablePrimary.RightToList()[0].Second, maybeExpression.RightToList()[0].Second)));
}
private AssignmentNode(ModifiablePrimaryNode modPrimary, ExpressionNode expression)
{
ModifiablePrimary = modPrimary;
Expression = expression;
}
