public static InterpreterResult Or(InterpreterResult left, InterpreterResult right)
{
var result = left.Result || right.Result;
var isAlwaysFalse = (bool?)null;
if (left.IsAlwaysFalse.HasValue && right.IsAlwaysFalse.HasValue)
{
isAlwaysFalse = left.IsAlwaysFalse.Value && right.IsAlwaysFalse.Value;
}
return(new InterpreterResult(result, isAlwaysFalse));
}
public InterpreterResult VisitBinaryOperatorNode(BinaryOperatorNode node)
{
switch (node.Op.Type)
{
case TokenType.And:
return(InterpreterResult.And(Visit(node.Left) as InterpreterResult, Visit(node.Right) as InterpreterResult));
case TokenType.Or:
return(InterpreterResult.Or(Visit(node.Left) as InterpreterResult, Visit(node.Right) as InterpreterResult));
case TokenType.LargerThan:
return(new InterpreterResult((decimal)Visit(node.Left) > (decimal)Visit(node.Right), null));
case TokenType.SmallerThan:
return(new InterpreterResult((decimal)Visit(node.Left) < (decimal)Visit(node.Right), null));
default:
throw new InvalidSyntaxException("Error syntax");
}
}