public TagAttribute(string name, Expression exp)
{
this.Name = name;
this.Expression = exp;
}
object EvalExpression(Expression exp)
{
if (exp is Function)
return EvalFunction(exp as Function);
if (exp is IntegerExpression)
return (exp as IntegerExpression).Value;
else if (exp is DoubleExpression)
return (exp as DoubleExpression).Value;
else if (exp is StringExpression)
return (exp as StringExpression).Value;
else if (exp is Field)
return EvalField(exp as Field);
else if (exp is Variable)
return GetVariableValue((exp as Variable).Name);
else
return new Exception("未知的表达式类型");
}
public void Add(Expression exp)
{
this.Expressions.Add(exp);
}
object[] EvalArguments(Expression[] exps)
{
object[] args = new object[exps.Length];
for (int i = 0; i < exps.Length; i++)
args[i] = EvalExpression(exps[i]);
return args;
}
