mirror of
https://github.com/golang/go.git
synced 2025-10-31 00:30:57 +00:00
1cde87b312
Add temporaries to reorder the assignment for OAS2XXX nodes. This makes orderstmt(), rewrite a, b, c = ... as tmp1, tmp2, tmp3 = ... a, b, c = tmp1, tmp2, tmp3 and a, ok = ... as t1, t2 = ... a = t1 ok = t2 Fixes #13433. Change-Id: Id0f5956e3a254d0a6f4b89b5f7b0e055b1f0e21f Reviewed-on: https://go-review.googlesource.com/34713 Run-TryBot: Dhananjay Nakrani <dhananjayn@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
151 lines
2.1 KiB
Go
151 lines
2.1 KiB
Go
// run
|
|
|
|
// Copyright 2011 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 reordering of assignments.
|
|
|
|
package main
|
|
|
|
import "fmt"
|
|
|
|
func main() {
|
|
p1()
|
|
p2()
|
|
p3()
|
|
p4()
|
|
p5()
|
|
p6()
|
|
p7()
|
|
p8()
|
|
p9()
|
|
}
|
|
|
|
var gx []int
|
|
|
|
func f(i int) int {
|
|
return gx[i]
|
|
}
|
|
|
|
func check(x []int, x0, x1, x2 int) {
|
|
if x[0] != x0 || x[1] != x1 || x[2] != x2 {
|
|
fmt.Printf("%v, want %d,%d,%d\n", x, x0, x1, x2)
|
|
panic("failed")
|
|
}
|
|
}
|
|
|
|
func check3(x, y, z, xx, yy, zz int) {
|
|
if x != xx || y != yy || z != zz {
|
|
fmt.Printf("%d,%d,%d, want %d,%d,%d\n", x, y, z, xx, yy, zz)
|
|
panic("failed")
|
|
}
|
|
}
|
|
|
|
func p1() {
|
|
x := []int{1, 2, 3}
|
|
i := 0
|
|
i, x[i] = 1, 100
|
|
_ = i
|
|
check(x, 100, 2, 3)
|
|
}
|
|
|
|
func p2() {
|
|
x := []int{1, 2, 3}
|
|
i := 0
|
|
x[i], i = 100, 1
|
|
_ = i
|
|
check(x, 100, 2, 3)
|
|
}
|
|
|
|
func p3() {
|
|
x := []int{1, 2, 3}
|
|
y := x
|
|
gx = x
|
|
x[1], y[0] = f(0), f(1)
|
|
check(x, 2, 1, 3)
|
|
}
|
|
|
|
func p4() {
|
|
x := []int{1, 2, 3}
|
|
y := x
|
|
gx = x
|
|
x[1], y[0] = gx[0], gx[1]
|
|
check(x, 2, 1, 3)
|
|
}
|
|
|
|
func p5() {
|
|
x := []int{1, 2, 3}
|
|
y := x
|
|
p := &x[0]
|
|
q := &x[1]
|
|
*p, *q = x[1], y[0]
|
|
check(x, 2, 1, 3)
|
|
}
|
|
|
|
func p6() {
|
|
x := 1
|
|
y := 2
|
|
z := 3
|
|
px := &x
|
|
py := &y
|
|
*px, *py = y, x
|
|
check3(x, y, z, 2, 1, 3)
|
|
}
|
|
|
|
func f1(x, y, z int) (xx, yy, zz int) {
|
|
return x, y, z
|
|
}
|
|
|
|
func f2() (x, y, z int) {
|
|
return f1(2, 1, 3)
|
|
}
|
|
|
|
func p7() {
|
|
x, y, z := f2()
|
|
check3(x, y, z, 2, 1, 3)
|
|
}
|
|
|
|
func p8() {
|
|
m := make(map[int]int)
|
|
m[0] = len(m)
|
|
if m[0] != 0 {
|
|
panic(m[0])
|
|
}
|
|
}
|
|
|
|
// Issue #13433: Left-to-right assignment of OAS2XXX nodes.
|
|
func p9() {
|
|
var x bool
|
|
|
|
// OAS2FUNC
|
|
x, x = fn()
|
|
checkOAS2XXX(x, "x, x = fn()")
|
|
|
|
// OAS2RECV
|
|
var c = make(chan bool, 10)
|
|
c <- false
|
|
x, x = <-c
|
|
checkOAS2XXX(x, "x, x <-c")
|
|
|
|
// OAS2MAPR
|
|
var m = map[int]bool{0: false}
|
|
x, x = m[0]
|
|
checkOAS2XXX(x, "x, x = m[0]")
|
|
|
|
// OAS2DOTTYPE
|
|
var i interface{} = false
|
|
x, x = i.(bool)
|
|
checkOAS2XXX(x, "x, x = i.(bool)")
|
|
}
|
|
|
|
//go:noinline
|
|
func fn() (bool, bool) { return false, true }
|
|
|
|
// checks the order of OAS2XXX.
|
|
func checkOAS2XXX(x bool, s string) {
|
|
if !x {
|
|
fmt.Printf("%s; got=(false); want=(true)\n", s)
|
|
panic("failed")
|
|
}
|
|
}
|