internal Expression Interpret(Notation notation)
{
var expressionFactory = ExpressionFactory.Accessor();
var expressions = new Stack <Expression>();
foreach (var @operator in notation.Postfix)
{
switch (expressionFactory.RequiredOperands(@operator, expressions.Count))
{
case 0:
expressions.Push(expressionFactory.Create(@operator));
break;
case 1:
expressions.Push(expressionFactory.Create(@operator, expressions.Pop()));
break;
case 2:
expressions.Push(expressionFactory.Create(@operator, expressions.Pop(), expressions.Pop()));
break;
default:
throw new NotSupportedException();
}
}
if (expressions.Count == 1)
{
return(expressions.Pop());
}
throw new ArgumentException(notation.Expression);
}