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+--- Thread: key-hash-proc for Set-of (/showthread.php?tid=564)
key-hash-proc for Set-of - RobertShiplett - 07-16-2012
I have had no success setting key-hash-proc and key-equality-proc for a {Set-of } even when predefining as constants as per the docs for ChartDataSeriesSet
Is there a known issue?
The compiler reports that Applet already defines key-hash-proc or complans that the proc passed is not a compile-time constant.
The docs contain no working example of a set of user-defined instances using declared hash and equal? as described in the {Set of } docs
A reply would be much appreciated as I should be able to use {difference } and {intersection } to handle my sets efficiently.
thanks in advance for any assistance ...
Contrary to the Doc's
QUOTE
This Type is simply a convenient shorthand for:
{Set-of
ChartDataSeries,
key-hash-proc = ChartDataSeries.hash,
key-equality-proc = ChartDataSeries.equal?
}
THAT CODE GIVES ERROR Argument [proc ChartDataSeries.hash] to Set-of is not an immutable value
It is in fact required to use a {define-proc } wrapper as a work-around, is it not ?
RE: key-hash-proc for Set-of - wbardwell - 07-18-2012
It does look like class proc's do not work for parametrized class parameters, even though I would expect them to work. As you say, putting the code in a top level define-proc (not inside a define-class) will let that work, as would wrapping the call to the class proc in a local {proc}.
RE: key-hash-proc for Set-of - RobertShiplett - 07-24-2012
Hi
Is there any chance of fixing the '#' anchor behavior for Curl links ?
At the moment it almost prevents Curl applets at height=100% in HTML as the navigation is crippled unless a link is left exposed in HTML.
thanks
Robert
RE: key-hash-proc for Set-of - wbardwell - 07-28-2012
Another work around is to call the function before using it in the parameterized type expression, that seems to get it to be converted into a proper proc.