go issue23017 源码
golang issue23017 代码
文件路径：/test/fixedbugs/issue23017.go
// run
// Copyright 2020 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.
// assignment order in multiple assignments.
// See issue #23017
package main
import "fmt"
func main() {}
func init() {
var m = map[int]int{}
var p *int
defer func() {
recover()
check(1, len(m))
check(42, m[2])
}()
m[2], *p = 42, 2
}
func init() {
var m = map[int]int{}
p := []int{}
defer func() {
recover()
check(1, len(m))
check(2, m[2])
}()
m[2], p[1] = 2, 2
}
func init() {
type P struct{ i int }
var m = map[int]int{}
var p *P
defer func() {
recover()
check(1, len(m))
check(3, m[2])
}()
m[2], p.i = 3, 2
}
func init() {
type T struct{ i int }
var x T
p := &x
p, p.i = new(T), 4
check(4, x.i)
}
func init() {
var m map[int]int
var a int
var p = &a
defer func() {
recover()
check(5, *p)
}()
*p, m[2] = 5, 2
}
var g int
func init() {
var m map[int]int
defer func() {
recover()
check(0, g)
}()
m[0], g = 1, 2
}
func init() {
type T struct{ x struct{ y int } }
var x T
p := &x
p, p.x.y = new(T), 7
check(7, x.x.y)
check(0, p.x.y)
}
func init() {
type T *struct{ x struct{ y int } }
x := struct{ y int }{0}
var q T = &struct{ x struct{ y int } }{x}
p := q
p, p.x.y = nil, 7
check(7, q.x.y)
}
func init() {
x, y := 1, 2
x, y = y, x
check(2, x)
check(1, y)
}
func check(want, got int) {
if want != got {
panic(fmt.Sprintf("wanted %d, but got %d", want, got))
}
}
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