private bool ParseOperator(Tokenizer tokenizer, TokenOperator token)
{
// Handle ternary
if (token.OpType == TokenOperator.OperatorType.TernaryTrue)
{
tokenizer.Next();
return(ParseTernaryOperator(tokenizer, token));
}
else if (token.OpType == TokenOperator.OperatorType.VectorStart)
{
tokenizer.Next();
return(ParseVector(tokenizer, true));
}
Operations.Function func = Operations.LookupOperator(token.OpType, 2);
if (func == null)
{
return(Error("Unknown operator `" + token.Text + "'", tokenizer));
}
tokenizer.Next();
if (!ParseExpression(tokenizer, token.Properties.Priority, token.Properties.LeftAssoc))
{
return(false);
}
d_instructions.Add(new InstructionFunction(token.Text, func, 2));
return(true);
}
private bool ParseFunction(Tokenizer tokenizer, TokenIdentifier identifier)
{
Token next = tokenizer.Peek();
bool loopit = true;
int numargs = 0;
if (next != null && (next is TokenOperator) && ((TokenOperator)next).OpType == TokenOperator.OperatorType.GroupEnd)
{
// Consume group end
tokenizer.Next();
loopit = false;
}
while (loopit)
{
if (!ParseExpression(tokenizer, -1, false))
{
return(false);
}
++numargs;
// See what is next
next = tokenizer.Peek();
if (next == null || !(next is TokenOperator))
{
return(Error("Expected `operator', but got " + (next != null ? next.Text : "(nothing)"), tokenizer));
}
TokenOperator nextop = next as TokenOperator;
if (nextop.OpType == TokenOperator.OperatorType.GroupEnd)
{
// Consume it
tokenizer.Next();
break;
}
else if (nextop.OpType != TokenOperator.OperatorType.Comma)
{
return(Error("Expected `,' but got " + next.Text, tokenizer));
}
// Consume token
tokenizer.Next();
}
Operations.Function func = Operations.LookupFunction(identifier.Text, numargs);
if (func == null)
{
return(Error(String.Format("Invalid function `{0}' for provided arguments", identifier.Text), tokenizer));
}
d_instructions.Add(new InstructionFunction(identifier.Text, func, numargs));
return(true);
}
public InstructionFunction(string name, Operations.Function function, int numargs)
{
Name = name;
Function = function;
NumArgs = numargs;
}