//解释器
public void Interpreter(PlayContext context)
{
if (context.PlayText.Length == 0)
{
return;
}
string playKey = context.PlayText.Substring(0, 1);
context.PlayText = context.PlayText.Substring(2);
double playValue = double.Parse(context.PlayText.Substring(0, context.PlayText.IndexOf(" ")));
Excute(playKey, playValue);
}
void Start()
{
PlayContext context = new PlayContext();
context.PlayText = "O 2 E 0.5 G 0.5 A 3 E 0.5";
Expression expression = null;
while (context.PlayText.Length > 0)
{
string str = context.PlayText.Substring(0, 1);
switch (str)
{
case "O":
expression = new Scale();
break;
}
expression.Interpreter(context);
}
}
