On Thu, Mar 28, 2019 at 9:42 PM Greg Bostrom <zbost...@gmail.com> wrote: > > I just posted this on on openstack. > Maybe someone here knows the answer? > > https://stackoverflow.com/questions/55410250/go-passing-a-member-function-as-an-argument-compile-error > > I would expect this to compile after watching this talk by Rob Pike > https://www.youtube.com/watch?v=HxaD_trXwRE&t=1830s > > > package main > > type StateFunc func(*M) StateFunc > > type M struct { > start StateFunc > } > > func New(start StateFunc) *M { > return &M{ > start: start, > } > } > > func (m *M) foo() StateFunc { > return nil > } > > func (m *M) Start() { > go m.run() > } > > func (m *M) run() { > state := m.start > for state != nil { > state = state(m) > } > } > > func main() { > m := New(foo) > } > > > It fails with > > prog.go:31:14: undefined: foo
Well, foo is indeed undefined. Did you mean to write new(M) in func main? Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
