Re: [Xotcl] How do I get a parameters default-value?

Dear Florian,

info parameter has a well known bug that it returns just the value of the last parameter invocation for the class. to get the full list, you have to do something like

X parameter {{p1 val1}} ... X parameter [concat [X info parameter] {{p2 val2} {p3 val3}}]

There is an undocumented feature to access the default values via:

puts d=[X set __defaults(p1)]

note that this might change in the future.

i have locally a complete rewrite of the parameter system of xotcl based on single and multivalued slots, but i have still to implement an as-far-as possible backward compatible top-level layer for it. It waits as well for a stress and feature test for a relational database layer we are developing, but anyhow, it should become part of the next release of xotcl.

greetings -gustaf

Murr, Florian schrieb:

package require XOTcl
namespace import xotcl::*

# Let's say, I got:

Class X -parameter {
    {p1  val1A}
}
X create x1 -p1 x1val1

# ...

# Now I change the default-values
X parameter {
    {p1  val1B}
}
X create x2 -p1 x2val1

# How do I get the current default-value 'val1B' for p1?
# Note 'X info parameter' is no option, since after:

X parameter {}
puts "X parameter = [X info parameter]"
X create x3
puts "x3 p1 --> [::x3 p1]" ;# still works.

# So the default-values are remembered somewhere!
# My guess was somewhere around '::xotcl::Class::Parameter', but I

just # could not find, where? - and how to access them? # # Somehow there must be a better way to access the current default-values # then via some newly created dummy object?!

# (May be even the "old" default-values 'val1A, val2A' (for ::x1)

are still remembered somewhere?) # # regards, # - Florian

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