mirror of
https://github.com/golang/go
synced 2024-11-15 02:20:32 -07:00
57668b84ff
Simplify the implementation of interface conversions in the compiler. Don't pass fields that aren't needed (the data word, usually) to the runtime. For generics, we need to put a dynamic type in an interface. The new dataWord function is exactly what we need (the type word will come from a dictionary). Change-Id: Iade5de5c174854b65ad248f35c7893c603f7be3d Reviewed-on: https://go-review.googlesource.com/c/go/+/340029 Trust: Keith Randall <khr@golang.org> Trust: Dan Scales <danscales@google.com> Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Dan Scales <danscales@google.com>
39 lines
574 B
Go
39 lines
574 B
Go
// errorcheck -0 -d=ssa/opt/debug=1
|
|
|
|
package main
|
|
|
|
// Trivial interface call devirtualization test.
|
|
|
|
type real struct {
|
|
value int
|
|
}
|
|
|
|
func (r *real) Value() int { return r.value }
|
|
|
|
type Valuer interface {
|
|
Value() int
|
|
}
|
|
|
|
type indirectiface struct {
|
|
a, b, c int
|
|
}
|
|
|
|
func (i indirectiface) Value() int {
|
|
return i.a + i.b + i.c
|
|
}
|
|
|
|
func main() {
|
|
var r Valuer
|
|
rptr := &real{value: 3}
|
|
r = rptr
|
|
|
|
if r.Value() != 3 { // ERROR "de-virtualizing call$"
|
|
panic("not 3")
|
|
}
|
|
|
|
r = indirectiface{3, 4, 5}
|
|
if r.Value() != 12 { // ERROR "de-virtualizing call$"
|
|
panic("not 12")
|
|
}
|
|
}
|