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// run
// Copyright 2010 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 order of evaluation in tuple assignments.
package main
var i byte = 0
var a [30]byte
func f() *byte {
i++
return &a[i-1]
}
func gbyte() byte {
i++
return 'a' + i - 1
}
func gint() byte {
i++
return i - 1
}
func x() (byte, byte) {
i++
return 'a' + i - 1, 'a' + i - 1
}
func e1(c chan byte, expected byte) chan byte {
if i != expected {
println("e1: got", i, "expected", expected)
panic("fail")
}
i++
return c
}
type Empty interface{}
type I interface {
Get() byte
}
type S1 struct {
i byte
}
func (p S1) Get() byte { return p.i }
type S2 struct {
i byte
}
func e2(p Empty, expected byte) Empty {
if i != expected {
println("e2: got", i, "expected", expected)
panic("fail")
}
i++
return p
}
func e3(p *I, expected byte) *I {
if i != expected {
println("e3: got", i, "expected", expected)
panic("fail")
}
i++
return p
}
func main() {
for i := range a {
a[i] = ' '
}
// 0 1 2 3 4 5
*f(), *f(), *f() = gbyte(), gbyte(), gbyte()
// 6 7 8
*f(), *f() = x()
m := make(map[byte]byte)
m[10] = 'A'
var p1, p2 bool
// 9 10
*f(), p1 = m[gint()]
// 11 12
*f(), p2 = m[gint()]
a[11] += '0'
if !p1 || p2 {
println("bad map check", i, p1, p2)
panic("fail")
}
m[13] = 'B'
// 13 14
delete(m, gint())
gbyte()
if _, present := m[13]; present {
println("bad map removal")
panic("fail")
}
c := make(chan byte, 1)
c <- 'C'
// 15 16
*f(), p1 = <-e1(c, 16)
close(c)
// 17 18
*f(), p2 = <-e1(c, 18)
a[17] += '0'
if !p1 || p2 {
println("bad chan check", i, p1, p2)
panic("fail")
}
s1 := S1{'D'}
s2 := S2{'E'}
var iv I
// 19 20
*e3(&iv, 19), p1 = e2(s1, 20).(I)
// 21 22
*e3(&iv, 21), p2 = e2(s2, 22).(I)
if !p1 || p2 {
println("bad interface check", i, p1, p2)
panic("fail")
}
s := string(a[0:i])
if s != "def ii A 0 C 0 " {
println("bad array results:", s)
panic("fail")
}
}