Hi gophers,
Apologies if this is covered somewhere, have searched and not found.
I'm curious about the Go2 generics draft, how does the team envisage the
code generated for the ShortestPath (without code expansion like C++
templates where it's obvious)? I can come up with two so far.
i) Use reflect to look up method names:
So the basic generic ShortestPath would look a bit like:
func ShortestPath(src,dst interface{}) interface{} {
srcV := reflect.ValueOf(src)
edgesM := srcV.MethodByName("Edges")
edges := edgesM.Call(...)
// etc.
}
ii) Autogenerate mutually recursive interfaces:
type _N interface {
Edges() []_E
}
type _E interface {
Nodes() []_N
}
func ShortestPath(src,dst _N) []_N {
edges := src.Edges()
// etc.
}
I'm not considering the problems with either approach, like having to wrap
the actual concrete types or conversions of slice values.
I'm also guessing I'm missing something obvious that makes it easy.
Cheers,
Jamie
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