diff options
Diffstat (limited to 'test/method5.go')
| -rw-r--r-- | test/method5.go | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/test/method5.go b/test/method5.go new file mode 100644 index 0000000..d87bb6f --- /dev/null +++ b/test/method5.go @@ -0,0 +1,297 @@ +// run + +// Copyright 2013 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. + +package main + +// Concrete types implementing M method. +// Smaller than a word, word-sized, larger than a word. +// Value and pointer receivers. + +type Tinter interface { + M(int, byte) (byte, int) +} + +type Tsmallv byte + +func (v Tsmallv) M(x int, b byte) (byte, int) { return b, x+int(v) } + +type Tsmallp byte + +func (p *Tsmallp) M(x int, b byte) (byte, int) { return b, x+int(*p) } + +type Twordv uintptr + +func (v Twordv) M(x int, b byte) (byte, int) { return b, x+int(v) } + +type Twordp uintptr + +func (p *Twordp) M(x int, b byte) (byte, int) { return b, x+int(*p) } + +type Tbigv [2]uintptr + +func (v Tbigv) M(x int, b byte) (byte, int) { return b, x+int(v[0])+int(v[1]) } + +type Tbigp [2]uintptr + +func (p *Tbigp) M(x int, b byte) (byte, int) { return b, x+int(p[0])+int(p[1]) } + +// Again, with an unexported method. + +type tsmallv byte + +func (v tsmallv) m(x int, b byte) (byte, int) { return b, x+int(v) } + +type tsmallp byte + +func (p *tsmallp) m(x int, b byte) (byte, int) { return b, x+int(*p) } + +type twordv uintptr + +func (v twordv) m(x int, b byte) (byte, int) { return b, x+int(v) } + +type twordp uintptr + +func (p *twordp) m(x int, b byte) (byte, int) { return b, x+int(*p) } + +type tbigv [2]uintptr + +func (v tbigv) m(x int, b byte) (byte, int) { return b, x+int(v[0])+int(v[1]) } + +type tbigp [2]uintptr + +func (p *tbigp) m(x int, b byte) (byte, int) { return b, x+int(p[0])+int(p[1]) } + +type tinter interface { + m(int, byte) (byte, int) +} + +// Embedding via pointer. + +type T1 struct { + T2 +} + +type T2 struct { + *T3 +} + +type T3 struct { + *T4 +} + +type T4 struct { +} + +func (t4 T4) M(x int, b byte) (byte, int) { return b, x+40 } + +var failed = false + +func CheckI(name string, i Tinter, inc int) { + b, x := i.M(1000, 99) + if b != 99 || x != 1000+inc { + failed = true + print(name, ".M(1000, 99) = ", b, ", ", x, " want 99, ", 1000+inc, "\n") + } + + CheckF("(i="+name+")", i.M, inc) +} + +func CheckF(name string, f func(int, byte) (byte, int), inc int) { + b, x := f(1000, 99) + if b != 99 || x != 1000+inc { + failed = true + print(name, "(1000, 99) = ", b, ", ", x, " want 99, ", 1000+inc, "\n") + } +} + +func checkI(name string, i tinter, inc int) { + b, x := i.m(1000, 99) + if b != 99 || x != 1000+inc { + failed = true + print(name, ".m(1000, 99) = ", b, ", ", x, " want 99, ", 1000+inc, "\n") + } + + checkF("(i="+name+")", i.m, inc) +} + +func checkF(name string, f func(int, byte) (byte, int), inc int) { + b, x := f(1000, 99) + if b != 99 || x != 1000+inc { + failed = true + print(name, "(1000, 99) = ", b, ", ", x, " want 99, ", 1000+inc, "\n") + } +} + +func shouldPanic(f func()) { + defer func() { + if recover() == nil { + panic("not panicking") + } + }() + f() +} + +func shouldNotPanic(f func()) { + f() +} + +func main() { + sv := Tsmallv(1) + CheckI("sv", sv, 1) + CheckF("sv.M", sv.M, 1) + CheckF("(&sv).M", (&sv).M, 1) + psv := &sv + CheckI("psv", psv, 1) + CheckF("psv.M", psv.M, 1) + CheckF("(*psv).M", (*psv).M, 1) + + sp := Tsmallp(2) + CheckI("&sp", &sp, 2) + CheckF("sp.M", sp.M, 2) + CheckF("(&sp).M", (&sp).M, 2) + psp := &sp + CheckI("psp", psp, 2) + CheckF("psp.M", psp.M, 2) + CheckF("(*psp).M", (*psp).M, 2) + + wv := Twordv(3) + CheckI("wv", wv, 3) + CheckF("wv.M", wv.M, 3) + CheckF("(&wv).M", (&wv).M, 3) + pwv := &wv + CheckI("pwv", pwv, 3) + CheckF("pwv.M", pwv.M, 3) + CheckF("(*pwv).M", (*pwv).M, 3) + + wp := Twordp(4) + CheckI("&wp", &wp, 4) + CheckF("wp.M", wp.M, 4) + CheckF("(&wp).M", (&wp).M, 4) + pwp := &wp + CheckI("pwp", pwp, 4) + CheckF("pwp.M", pwp.M, 4) + CheckF("(*pwp).M", (*pwp).M, 4) + + bv := Tbigv([2]uintptr{5, 6}) + pbv := &bv + CheckI("bv", bv, 11) + CheckF("bv.M", bv.M, 11) + CheckF("(&bv).M", (&bv).M, 11) + CheckI("pbv", pbv, 11) + CheckF("pbv.M", pbv.M, 11) + CheckF("(*pbv).M", (*pbv).M, 11) + + bp := Tbigp([2]uintptr{7,8}) + CheckI("&bp", &bp, 15) + CheckF("bp.M", bp.M, 15) + CheckF("(&bp).M", (&bp).M, 15) + pbp := &bp + CheckI("pbp", pbp, 15) + CheckF("pbp.M", pbp.M, 15) + CheckF("(*pbp).M", (*pbp).M, 15) + + _sv := tsmallv(1) + checkI("_sv", _sv, 1) + checkF("_sv.m", _sv.m, 1) + checkF("(&_sv).m", (&_sv).m, 1) + _psv := &_sv + checkI("_psv", _psv, 1) + checkF("_psv.m", _psv.m, 1) + checkF("(*_psv).m", (*_psv).m, 1) + + _sp := tsmallp(2) + checkI("&_sp", &_sp, 2) + checkF("_sp.m", _sp.m, 2) + checkF("(&_sp).m", (&_sp).m, 2) + _psp := &_sp + checkI("_psp", _psp, 2) + checkF("_psp.m", _psp.m, 2) + checkF("(*_psp).m", (*_psp).m, 2) + + _wv := twordv(3) + checkI("_wv", _wv, 3) + checkF("_wv.m", _wv.m, 3) + checkF("(&_wv).m", (&_wv).m, 3) + _pwv := &_wv + checkI("_pwv", _pwv, 3) + checkF("_pwv.m", _pwv.m, 3) + checkF("(*_pwv).m", (*_pwv).m, 3) + + _wp := twordp(4) + checkI("&_wp", &_wp, 4) + checkF("_wp.m", _wp.m, 4) + checkF("(&_wp).m", (&_wp).m, 4) + _pwp := &_wp + checkI("_pwp", _pwp, 4) + checkF("_pwp.m", _pwp.m, 4) + checkF("(*_pwp).m", (*_pwp).m, 4) + + _bv := tbigv([2]uintptr{5, 6}) + _pbv := &_bv + checkI("_bv", _bv, 11) + checkF("_bv.m", _bv.m, 11) + checkF("(&_bv).m", (&_bv).m, 11) + checkI("_pbv", _pbv, 11) + checkF("_pbv.m", _pbv.m, 11) + checkF("(*_pbv).m", (*_pbv).m, 11) + + _bp := tbigp([2]uintptr{7,8}) + checkI("&_bp", &_bp, 15) + checkF("_bp.m", _bp.m, 15) + checkF("(&_bp).m", (&_bp).m, 15) + _pbp := &_bp + checkI("_pbp", _pbp, 15) + checkF("_pbp.m", _pbp.m, 15) + checkF("(*_pbp).m", (*_pbp).m, 15) + + t4 := T4{} + t3 := T3{&t4} + t2 := T2{&t3} + t1 := T1{t2} + CheckI("t4", t4, 40) + CheckI("&t4", &t4, 40) + CheckI("t3", t3, 40) + CheckI("&t3", &t3, 40) + CheckI("t2", t2, 40) + CheckI("&t2", &t2, 40) + CheckI("t1", t1, 40) + CheckI("&t1", &t1, 40) + + // x.M panics if x is an interface type and is nil, + // or if x.M expands to (*x).M where x is nil, + // or if x.M expands to x.y.z.w.M where something + // along the evaluation of x.y.z.w is nil. + var f func(int, byte) (byte, int) + shouldPanic(func() { psv = nil; f = psv.M }) + shouldPanic(func() { pwv = nil; f = pwv.M }) + shouldPanic(func() { pbv = nil; f = pbv.M }) + shouldPanic(func() { var i Tinter; f = i.M }) + shouldPanic(func() { _psv = nil; f = _psv.m }) + shouldPanic(func() { _pwv = nil; f = _pwv.m }) + shouldPanic(func() { _pbv = nil; f = _pbv.m }) + shouldPanic(func() { var _i tinter; f = _i.m }) + shouldPanic(func() { var t1 T1; f = t1.M }) + shouldPanic(func() { var t2 T2; f = t2.M }) + shouldPanic(func() { var t3 *T3; f = t3.M }) + shouldPanic(func() { var t3 T3; f = t3.M }) + + if f != nil { + panic("something set f") + } + + // x.M does not panic if x is a nil pointer and + // M is a method with a pointer receiver. + shouldNotPanic(func() { psp = nil; f = psp.M }) + shouldNotPanic(func() { pwp = nil; f = pwp.M }) + shouldNotPanic(func() { pbp = nil; f = pbp.M }) + shouldNotPanic(func() { _psp = nil; f = _psp.m }) + shouldNotPanic(func() { _pwp = nil; f = _pwp.m }) + shouldNotPanic(func() { _pbp = nil; f = _pbp.m }) + shouldNotPanic(func() { var t4 T4; f = t4.M }) + if f == nil { + panic("nothing set f") + } +} |