Recently I was trying to write a func using generics where I wanted to use
a slice of an interface that would contain implementers of that interface
and then pass those types to a generic function, but I ran into this error:
type MyStruct of MySlice{} does not match inferred type MyInterface for T
My code is complex so I wrote the simplest example for this email and here
is part of that code:
type Suiter interface {
Suit()
}
func Append[T any](s []T, i T) []T {
return append(s, i)
}
func main() {
var s []Suiter
//CAN GENERICS SUPPORT THIS?
//s = Append(s, Clubs{})
//s = Append(s, Hearts{})
//s = Append(s, Diamonds{})
//s = Append(s, Spades{})
//VERSUS HAVING TO DO THIS?
s = Append(s, Suiter(Clubs{}))
s = Append(s, Suiter(Hearts{}))
s = Append(s, Suiter(Diamonds{}))
s = Append(s, Suiter(Spades{}))
for _, suit := range s {
fmt.Printf("Suit: %s\n", suitName(suit))
}
}
The full code is here <https://goplay.tools/snippet/tFmC7rnFP3x> in a
playground.
*Note: *My example func Append() makes no sense in real use, I only use it
as it should be an easily understood example to show the syntax I am trying
to illustrate.
*Question:* Is there a way to write Append() such that I can call Append(s,
Clubs{}) instead of having to write Append(s, Suiter(Clubs{}))?
And if no, is there a chance that in the future Go generics will be able to
support that level of type inference?
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