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Beginner Joined: 10 Oct 2007 Posts: 17

Hi again,

Thanks go to people that have helped with previous problems.

I have imported a settings file from zmud into cmud that relies on hundreds of variables that are stored within other variables.

A contrived example-

#Var lowerlayer "final result"
#Var higherlayer "@lowerlayer"

Zmud used to fully expand @higherlayer all the way to 'final result' before sending to the mud.

Cmud dosnt and neither can we use brackets anymore for double expansion, so if I use @higherlayer Cmud sends '@lowerlayer' to the mud. I have tried using eval() but that actually strips spaces from the bottom variable ie it sends 'finalresult' instead of 'final result'

How can I ask Cmud to expand variables to the bottom layer before sending to the mud?

Thanks

Posted: Mon Jan 28, 2008 5:05 pm

#var higherlayer {@lowerlayer} should work fine. Simple test:

#var lowerlayer "hello!"
#var higherlayer {@lowerlayer}
#say @higherlayer

prints "hello!" as you'd expect. In CMUD, you should use quotes "" to surround literal strings. These are strings that won't be expanded. If you want variables (beginning with @) and functions (beginning with %) to be expanded, you should use braces {}, which are used to tell CMUD that the result is still a string, but should be expanded first. Brackets () are used to indicate an expression, which'll be evaluated, which is slightly different to expansion - evaluation normally involves a true-or-false test with an operator like = or >.

Enchanter Joined: 09 Sep 2007 Posts: 605

In most cases

#Var higherlayer @lowerlayer;
(or even just higherlayer=@lowerlayer syntax)

will work fine.

Beginner Joined: 10 Oct 2007 Posts: 17

Thank you.

I see the difference between #var example "" and #var example {} now and I have a better understanding of literals.

I suppose the only real reason to use "" over {} is when you have special characters in the variable.

Posted: Mon Jan 28, 2008 6:11 pm

Indeed. In zMUD, using

#var hp "%1"

is ambiguous - do you mean the literal string "%1" or the contents of the variable %1? In CMUD, "%1" means the literal string and {%1} expands the variable.