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go/ssa/interp/testdata/methprom.go

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package main
// Tests of method promotion logic.
type A struct{ magic int }
func (a A) x() {
if a.magic != 1 {
panic(a.magic)
}
}
func (a *A) y() *A {
return a
}
type B struct{ magic int }
func (b B) p() {
if b.magic != 2 {
panic(b.magic)
}
}
func (b *B) q() {
if b != theC.B {
panic("oops")
}
}
type I interface {
f()
}
type impl struct{ magic int }
func (i impl) f() {
if i.magic != 3 {
panic("oops")
}
}
type C struct {
A
*B
I
}
func assert(cond bool) {
if !cond {
panic("failed")
}
}
var theC = C{
A: A{1},
B: &B{2},
I: impl{3},
}
func addr() *C {
return &theC
}
func value() C {
return theC
}
func main() {
// address
addr().x()
if addr().y() != &theC.A {
panic("oops")
}
addr().p()
addr().q()
addr().f()
// addressable value
var c C = value()
c.x()
if c.y() != &c.A {
panic("oops")
}
c.p()
c.q()
c.f()
// non-addressable value
value().x()
// value().y() // not in method set
value().p()
value().q()
value().f()
}