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SubAdmin Joined: 18 Nov 2001 Posts: 5182

I have this button that hasn't ever worked in CMud. At first I figured it was because of the old zMud cross window variable references it had. Then in recent versions I could believe it to be caused by the variables in the caption not being visible to the window that holds the button. Now it seems from testing that the problem is the first part of the button caption. To see the parsing error enter at the command line #SHOW %if(1,,)

Using %null between the commas makes it work, but since #SHOW %eval() does not throw an error I have to believe the use of %null should not be required.

Just as a side note I can actually take that portion out of the button in CMud, where as it was needed with zMud because of the cross window referencing not causing an update. A step forward, yay!

Posted: Sun Oct 28, 2007 4:01 am

It's stranger that #show %eval(1,,) works, but %if doesn't. However, that %if syntax is pretty bizarre at first glance, so it might be better to make the %eval example fail than to make the %if example work.

SubAdmin Joined: 18 Nov 2001 Posts: 5182

The %if example though is the valid syntax for %if. It takes 3 parameters with the third being optional. #SHOW %if(1,) does not throw an error and it shouldn't.

I think the problem is what it says in the reference for %if. There it list the first 2 parameters as optional, and the 3rd as required. Some how this seems to be totally backwards.

As long as I am playing around with function parsing errors. #SHOW %eval(",") should display the comma.

Posted: Mon Oct 29, 2007 9:48 pm

Well, that's very interesting. The Reference is supposed to show that the 3rd parameter is optional. At least that's what is in the CMD.DB database where this information is stored. So there seems to be a problem with the Reference panel, as well as with the parser. I'll see what I can find.