Wire generate: Support generics #354
Description
Is your feature request related to a problem? Please describe.
When I used wire to build the code with go generics in golang:1.18, but It didn't work and throw some error.
There are some code, command and log in Additional context.
Describe the solution you'd like
I think that wire should support code with go generics as soon as possible for golang:1.18. It must a great power to help developers to build the apps.
Describe alternatives you've considered
Nothing.
Additional context
Code
main.go
package main
import "fmt"
type Message struct {
Msg string
V int
}
func NewMessage(v int) Message {
return Message{Msg: "Hi there!", V: v + 1}
}
type Greeter struct {
Message Message // <- adding a Message field
}
func NewGreeter(m Message) Greeter {
return Greeter{Message: m}
}
func (g Greeter) Greet() Message {
return g.Message
}
type V interface {
int | float32
}
func NewV[T V]() T {
return 2
}
type Event struct {
Greeter Greeter // <- adding a Greeter field
}
func NewEvent(g Greeter) Event {
return Event{Greeter: g}
}
func (e Event) Start() {
m := e.Greeter.Greet()
fmt.Println(m.Msg, m.V)
}
func main() {
e := InitializeEvent()
e.Start()
}
// func main() {
// v := NewV[int]()
// message := NewMessage(v)
// greeter := NewGreeter(message)
// event := NewEvent(greeter)
// event.Start()
// }
wire.go
//go:build wireinject
package main
// The build tag makes sure the stub is not built in the final build.
import "github.com/google/wire"
func InitializeEvent() Event {
wire.Build(NewEvent, NewGreeter, NewMessage, NewV)
return Event{}
}
Command
wire
Error log
wire: ~/test/wire/main.go:27:6: expected ';', found '|'
wire: ~/test/wire/main.go:31:2: expected '}', found 'return'
wire: ~/test/wire/main.go:31:9: expected ';', found 2
wire: ~/test/wire/main.go:27:2: int is not an interface
wire: ~/test/wire/wire.go:10:47: undeclared name: NewV
wire: generate failed