Hi Attilio!

Attilio Dona` wrote:

Hy,

Thanks to XOTcl I'm rethinking the OO paradigm and doing metaprogramming easier.

thanks!!

1. Parameter introspection

I use the Metaclass concept to model metainfos and use the parameter command to add meta-attributes runtime. As already You pointed out the parameter introspection (className info parameter) mechanism is not correct, so it is needed some parsing, with euristic regexp, to extract the parameters info.

Also the command:

className info parameter parameterName

doesn't work as expected, because it ignores parameterName

Have you planned to release in the near future the fix to this problem?

I agree, we should fix this for the next release ...

2 Parameter strange behavoir

When using Parameter command I have noticed same strange behavoirs, for examples:

case 1: Class X -parameter {{-x 100}} ::X

case 2: Class X -parameter [list {-x 100}] wrong # args: ....

case 1 and 2 are perfectly equivalent, so I think there is same strange parsing inside a C function. Also note that this is true only for "negative" attribute, ie: Class X -parameter [list {x 100}] work as expected.

this is because -... has a meaning for the paramters, like widget options, and is substituted, if you don't put two brackets around it {{..}} ... see language reference for more explanation.

As this is a normal substitution in Tcl, you can get around this problem by backslashing the "-":

Class X -parameter [list {-x 100}]

this works.

Uwe

Attilio

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