How to dump methods of structs in Golang?
go
Solution
You can list the methods of a type using the `reflect` package. For example:
fooType := reflect.TypeOf(&Foo{})
for i := 0; i < fooType.NumMethod(); i++ {
method := fooType.Method(i)
fmt.Println(method.Name)
}
You can play around with this here: http://play.golang.org/p/wNuwVJM6vr
With that in mind, if you want to check whether a type implements a certain method set, you might find it easier to use interfaces and a type assertion. For instance:
func implementsBar(v interface{}) bool {
type Barer interface {
Bar() string
}
_, ok := v.(Barer)
return ok
}
...
fmt.Println("Foo implements the Bar method:", implementsBar(Foo{}))
Or if you just want what amounts to a compile time assertion that a particular type has the methods, you could simply include the following somewhere:
var _ Barer = Foo{}
Problem
The Golang "fmt" package has a dump method called `Printf("%+v", anyStruct)`. I'm looking for any method to dump a struct and its methods too. For example: ``` type Foo struct { Prop string } func (f Foo)Bar() string { return f.Prop } ``` I want to check the existence of the `Bar()` method in an initialized instance of type `Foo` (not only properties). Is there any good way to do this?