public bool Process(IExpressionWalker walker)
{
//result = ExpressionParser.ExternalLookup(VariableName);
result = walker.ParserVariables.Get(VariableName);
walker.ValueStack.Push(result);
return(true);
}
private void addVariable(string name, VauleExpression value)
{
try
{
variables.Add(name, value);
}
catch (ArgumentException)
{
variables[name] = value;
}
}
protected override bool process(IExpressionWalker walker, VauleExpression left, VauleExpression right)
{
var leftNumber = left as VauleExpression.NumericVauleExpression;
if (leftNumber == null)
{
walker.Fail("Internal parsing error: Expected value on the left to be a number.");
return(false);
}
var rightNumber = right as VauleExpression.NumericVauleExpression;
if (rightNumber == null)
{
walker.Fail("Internal parsing error: Expected value on the right to be a number.");
return(false);
}
result = new VauleExpression.FloatVauleExpression(leftNumber.Value + rightNumber.Value);
walker.ValueStack.Push(result);
return(true);
}
