On Fri, Aug 23, 2019 at 9:25 PM Lee Rick <blade2i...@gmail.com> wrote:
>
> i want to do
> type A struct{ Name string}
> type B struct{Age int}
> type C struct{Address string}
>
> a, b, c := A{}, B{},C{}
> have a function
> d1 := merge(a,b) //d1 like struct{Name string, Age int}
> d2 := merge(a,c) //d2 like struct{Name string, Address string}
> d3 := merge(b,c) //d3 like struct{Age int, Address string}
You cannot have a function that merges two structs and returns a new
one, but you can have structs that are compositions of other structs.
type AB struct {
A
B
}
Struct AB is a struct containing both A and B. You can access the
members of A and B as though they're members of AB.
ab:=AB{}
ab.Name="a"
ab.Age=1
This is also valid:
ab.A.Name="a"
ab.B.Age=1
Initialization has to be explicit though:
ab:=AB{A:A{Name:"name"}, B:B{Age:1}}
>
>
> how to realize merge function? anyone can give me a demo
>
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