F# Class with Generics : 'constructor deprecated' error
- by akaphenom
I am trying to create a a class that will store a time series of data - organized by groups, but I had some compile errors so I stripped down to the basics (just a simple instantiation) and still can't overcome the compile error. I was hoping some one may have seen this issue before. Clas is defined as:
type TimeSeriesQueue<'V, 'K when 'K: comparison> = class
val private m_daysInCache: int
val private m_cache: Map<'K, 'V list ref > ref;
val private m_getKey: ('V -> 'K) ;
private new(getKey) = {
m_cache = ref Map.empty
m_daysInCache = 7 ;
m_getKey = getKey ;
}
end
So that looks OK to me (it may not be, but doesnt have any errors or warnings) - the instantiation gets the error:
type tempRec = {
someKey: string ;
someVal1: int ;
someVal2: int ;
}
let keyFunc r:tempRec = r.someKey
// error occurs on the following line
let q = new TimeSeriesQueue<tempRec, string> keyFunc
This construct is deprecated: The use
of the type syntax 'int C' and 'C
' is not permitted here. Consider
adjusting this type to be written in
the form 'C'
NOTE This may be simple stupidity - I am just getting back from holiday and my brain is still on time zone lag...
