17 Dec
2007
17 Dec
'07
11:05 a.m.
If "values of self" in the last constraint mean, for example, all
instances in the "classes"
property of 1 package then yes; that is exactly what I mean.
Toon
Adrian Kuhn wrote:
Do you mean to add the following property to
FM3.Property
key: FM3.Property
with the constraint that
if key is set, it must not be null
if key is set, key.class must equal self.type
if key is set, each value of elem.key must be unique within
{ elem.key | elem is in values of self }
like that?
AA
On 17 Dec 2007, at 10:49 , Toon Verwaest wrote:
Wouldn't it be useful to be able to specify
properties to be keyed
when
they are multivalued? This would allow us to generate dictionary
related
code for those keyed elements; and en plus give us a way to specify
that
one of the properties can not be used twice within a same environment.
Example usage would be the classes property of a fm3.Package which
would
be keyed by the property name.
Like this we would be able to do something like:
aPackage.getFromClassesAt("aName") instead of having to loop over the
classes until we find the right one.
I know that Adrian just stores all fm3specified packages+classes into
one big dictionary... but of course; having this property would also
enable its use one level lower.
Just a thought.
Toon
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