public virtual TreeNode OnCompareGreaterThanOrEqual(TreeNode [] args)
{
BooleanLiteral a = (BooleanLiteral)OnCompareGreaterThan(args);
BooleanLiteral b = (BooleanLiteral)OnCompareEqual(args);
return(new BooleanLiteral(a.Value || b.Value));
}
public virtual TreeNode OnIf(TreeNode [] args)
{
if (args == null || args.Length < 2 || args.Length > 3)
{
throw new ArgumentException("if accepts 2 or 3 arguments");
}
TreeNode arg = Evaluate(args[0]);
if (!(arg is BooleanLiteral))
{
throw new ArgumentException("first if argument must be boolean");
}
BooleanLiteral conditional = (BooleanLiteral)arg;
if (conditional.Value)
{
return(Evaluate(args[1]));
}
else if (args.Length == 3)
{
return(Evaluate(args[2]));
}
return(new VoidLiteral());
}
private TreeNode OnAndOr(TreeNode [] args, bool and)
{
if (args.Length < 2)
{
throw new ArgumentException("must have two or more boolean arguments");
}
bool result = false;
for (int i = 0; i < args.Length; i++)
{
TreeNode node = Evaluate(args[i]);
if (!(node is BooleanLiteral))
{
throw new ArgumentException("arguments must be boolean");
}
BooleanLiteral arg = (BooleanLiteral)node;
if (i == 0)
{
result = arg.Value;
continue;
}
if (and)
{
result &= arg.Value;
}
else
{
result |= arg.Value;
}
}
return(new BooleanLiteral(result));
}
public virtual TreeNode OnCompareNotEqual(TreeNode [] args)
{
BooleanLiteral result = (BooleanLiteral)OnCompareEqual(args);
return(new BooleanLiteral(!result.Value));
}
void TokenPush(bool as_string)
{
if (current_token.Length == 0 && !as_string)
{
return;
}
string token = current_token.ToString();
if (Debug)
{
Console.Write("{3}[{0}] TOKEN({4},{5}): [{2}{1}{2}]", scope, token,
as_string ? "\"" : string.Empty, string.Empty.PadLeft(scope - 1, ' '),
line, column - current_token.Length);
}
TreeNode node;
if (as_string)
{
node = new StringLiteral(token);
}
else if (token == "#t")
{
node = new BooleanLiteral(true);
}
else if (token == "#f")
{
node = new BooleanLiteral(false);
}
else if (token.Length > 0 && token != "." && token != "-" &&
token != "+" && number_regex.IsMatch(token))
{
try {
if (token.StartsWith("0x") || token.StartsWith("-0x"))
{
int offset = token[0] == '-' ? 3 : 2;
int value = int.Parse(token.Substring(offset),
NumberStyles.HexNumber, culture_info.NumberFormat);
node = new IntLiteral(value * (offset == 3 ? -1 : 1));
}
else if (token.Contains("."))
{
node = new DoubleLiteral(double.Parse(token,
NumberStyles.Float, culture_info.NumberFormat));
}
else
{
node = new IntLiteral(int.Parse(token,
NumberStyles.Integer, culture_info.NumberFormat));
}
} catch {
throw new FormatException("Invalid number format: " + token);
}
}
else
{
node = new FunctionNode(token);
}
if (Debug)
{
Console.WriteLine(" => [{0}]", node);
}
node.Line = line;
node.Column = column;
current_parent.AddChild(node);
current_token.Remove(0, current_token.Length);
}