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// run
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test simple methods of various types, with pointer and
// value receivers.
package main
type S string
type S1 string
type I int
type I1 int
type T struct {
x int
}
type T1 T
func (s S) val() int { return 1 }
func (s *S1) val() int { return 2 }
func (i I) val() int { return 3 }
func (i *I1) val() int { return 4 }
func (t T) val() int { return 7 }
func (t *T1) val() int { return 8 }
type Val interface {
val() int
}
func val(v Val) int { return v.val() }
func main() {
var s S
var ps *S1
var i I
var pi *I1
var pt *T1
var t T
var v Val
if s.val() != 1 {
println("s.val:", s.val())
panic("fail")
}
if S.val(s) != 1 {
println("S.val(s):", S.val(s))
panic("fail")
}
if (*S).val(&s) != 1 {
println("(*S).val(s):", (*S).val(&s))
panic("fail")
}
if ps.val() != 2 {
println("ps.val:", ps.val())
panic("fail")
}
if (*S1).val(ps) != 2 {
println("(*S1).val(ps):", (*S1).val(ps))
panic("fail")
}
if i.val() != 3 {
println("i.val:", i.val())
panic("fail")
}
if I.val(i) != 3 {
println("I.val(i):", I.val(i))
panic("fail")
}
if (*I).val(&i) != 3 {
println("(*I).val(&i):", (*I).val(&i))
panic("fail")
}
if pi.val() != 4 {
println("pi.val:", pi.val())
panic("fail")
}
if (*I1).val(pi) != 4 {
println("(*I1).val(pi):", (*I1).val(pi))
panic("fail")
}
if t.val() != 7 {
println("t.val:", t.val())
panic("fail")
}
if pt.val() != 8 {
println("pt.val:", pt.val())
panic("fail")
}
if (*T1).val(pt) != 8 {
println("(*T1).val(pt):", (*T1).val(pt))
panic("fail")
}
if val(s) != 1 {
println("val(s):", val(s))
panic("fail")
}
if val(ps) != 2 {
println("val(ps):", val(ps))
panic("fail")
}
if val(i) != 3 {
println("val(i):", val(i))
panic("fail")
}
if val(pi) != 4 {
println("val(pi):", val(pi))
panic("fail")
}
if val(t) != 7 {
println("val(t):", val(t))
panic("fail")
}
if val(pt) != 8 {
println("val(pt):", val(pt))
panic("fail")
}
if Val.val(i) != 3 {
println("Val.val(i):", Val.val(i))
panic("fail")
}
v = i
if Val.val(v) != 3 {
println("Val.val(v):", Val.val(v))
panic("fail")
}
var zs struct{ S }
var zps struct{ *S1 }
var zi struct{ I }
var zpi struct{ *I1 }
var zpt struct{ *T1 }
var zt struct{ T }
var zv struct{ Val }
if zs.val() != 1 {
println("zs.val:", zs.val())
panic("fail")
}
if zps.val() != 2 {
println("zps.val:", zps.val())
panic("fail")
}
if zi.val() != 3 {
println("zi.val:", zi.val())
panic("fail")
}
if zpi.val() != 4 {
println("zpi.val:", zpi.val())
panic("fail")
}
if zt.val() != 7 {
println("zt.val:", zt.val())
panic("fail")
}
if zpt.val() != 8 {
println("zpt.val:", zpt.val())
panic("fail")
}
if val(zs) != 1 {
println("val(zs):", val(zs))
panic("fail")
}
if val(zps) != 2 {
println("val(zps):", val(zps))
panic("fail")
}
if val(zi) != 3 {
println("val(zi):", val(zi))
panic("fail")
}
if val(zpi) != 4 {
println("val(zpi):", val(zpi))
panic("fail")
}
if val(zt) != 7 {
println("val(zt):", val(zt))
panic("fail")
}
if val(zpt) != 8 {
println("val(zpt):", val(zpt))
panic("fail")
}
zv.Val = zi
if zv.val() != 3 {
println("zv.val():", zv.val())
panic("fail")
}
if (&zs).val() != 1 {
println("(&zs).val:", (&zs).val())
panic("fail")
}
if (&zps).val() != 2 {
println("(&zps).val:", (&zps).val())
panic("fail")
}
if (&zi).val() != 3 {
println("(&zi).val:", (&zi).val())
panic("fail")
}
if (&zpi).val() != 4 {
println("(&zpi).val:", (&zpi).val())
panic("fail")
}
if (&zt).val() != 7 {
println("(&zt).val:", (&zt).val())
panic("fail")
}
if (&zpt).val() != 8 {
println("(&zpt).val:", (&zpt).val())
panic("fail")
}
if val(&zs) != 1 {
println("val(&zs):", val(&zs))
panic("fail")
}
if val(&zps) != 2 {
println("val(&zps):", val(&zps))
panic("fail")
}
if val(&zi) != 3 {
println("val(&zi):", val(&zi))
panic("fail")
}
if val(&zpi) != 4 {
println("val(&zpi):", val(&zpi))
panic("fail")
}
if val(&zt) != 7 {
println("val(&zt):", val(&zt))
panic("fail")
}
if val(&zpt) != 8 {
println("val(&zpt):", val(&zpt))
panic("fail")
}
zv.Val = &zi
if zv.val() != 3 {
println("zv.val():", zv.val())
panic("fail")
}
promotion()
}
type A struct{ B }
type B struct {
C
*D
}
type C int
func (C) f() {} // value receiver, direct field of A
func (*C) g() {} // pointer receiver
type D int
func (D) h() {} // value receiver, indirect field of A
func (*D) i() {} // pointer receiver
func expectPanic() {
if r := recover(); r == nil {
panic("expected nil dereference")
}
}
func promotion() {
var a A
// Addressable value receiver.
a.f()
a.g()
func() {
defer expectPanic()
a.h() // dynamic error: nil dereference in a.B.D->f()
}()
a.i()
// Non-addressable value receiver.
A(a).f()
// A(a).g() // static error: cannot call pointer method on A literal.B.C
func() {
defer expectPanic()
A(a).h() // dynamic error: nil dereference in A().B.D->f()
}()
A(a).i()
// Pointer receiver.
(&a).f()
(&a).g()
func() {
defer expectPanic()
(&a).h() // dynamic error: nil deref: nil dereference in (&a).B.D->f()
}()
(&a).i()
c := new(C)
c.f() // makes a copy
c.g()
}