mirror of
https://github.com/golang/go
synced 2024-11-26 22:11:25 -07:00
45320c23f2
Range over integer is enabled now without the GOEXPERIMENT. The GOEXPERIMENT is only for range over func. Rename it to rangefunc. For #61405. Change-Id: I9405fb8e2e30827875716786823856090a1a0cad Reviewed-on: https://go-review.googlesource.com/c/go/+/539277 Reviewed-by: Russ Cox <rsc@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
334 lines
8.1 KiB
Go
334 lines
8.1 KiB
Go
// runoutput -goexperiment rangefunc
|
|
|
|
// Copyright 2023 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.
|
|
|
|
// Torture test for range-over-func.
|
|
//
|
|
// cmd/internal/testdir runs this like
|
|
//
|
|
// go run rangegen.go >x.go
|
|
// go run x.go
|
|
//
|
|
// but a longer version can be run using
|
|
//
|
|
// go run rangegen.go long
|
|
//
|
|
// In that second form, rangegen takes care of compiling
|
|
// and running the code it generates, in batches.
|
|
// That form takes 10-20 minutes to run.
|
|
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
"os/exec"
|
|
"strings"
|
|
)
|
|
|
|
const verbose = false
|
|
|
|
func main() {
|
|
long := len(os.Args) > 1 && os.Args[1] == "long"
|
|
log.SetFlags(0)
|
|
log.SetPrefix("rangegen: ")
|
|
|
|
b := new(bytes.Buffer)
|
|
tests := ""
|
|
flush := func(force bool) {
|
|
if !long || (strings.Count(tests, "\n") < 1000 && !force) {
|
|
return
|
|
}
|
|
p(b, mainCode, tests)
|
|
err := os.WriteFile("tmp.go", b.Bytes(), 0666)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
out, err := exec.Command("go", "run", "tmp.go").CombinedOutput()
|
|
if err != nil {
|
|
log.Fatalf("go run tmp.go: %v\n%s", err, out)
|
|
}
|
|
print(".")
|
|
if force {
|
|
print("\nPASS\n")
|
|
}
|
|
b.Reset()
|
|
tests = ""
|
|
p(b, "package main\n\n")
|
|
p(b, "const verbose = %v\n\n", verbose)
|
|
}
|
|
|
|
p(b, "package main\n\n")
|
|
p(b, "const verbose = %v\n\n", verbose)
|
|
max := 2
|
|
if !long {
|
|
max = 5
|
|
}
|
|
for i := 1; i <= max; i++ {
|
|
maxDouble := -1
|
|
if long {
|
|
maxDouble = i
|
|
}
|
|
for double := -1; double <= maxDouble; double++ {
|
|
code := gen(new(bytes.Buffer), "", "", "", i, double, func(c int) bool { return true })
|
|
for j := 0; j < code; j++ {
|
|
hi := j + 1
|
|
if long {
|
|
hi = code
|
|
}
|
|
for k := j; k < hi && k < code; k++ {
|
|
s := fmt.Sprintf("%d_%d_%d_%d", i, double+1, j, k)
|
|
code0 := gen(b, "testFunc"+s, "", "yield2", i, double, func(c int) bool { return c == j || c == k })
|
|
code1 := gen(b, "testSlice"+s, "_, ", "slice2", i, double, func(c int) bool { return c == j || c == k })
|
|
if code0 != code1 {
|
|
panic("bad generator")
|
|
}
|
|
tests += "test" + s + "()\n"
|
|
p(b, testCode, "test"+s, []int{j, k}, "testFunc"+s, "testSlice"+s)
|
|
flush(false)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
for i := 1; i <= max; i++ {
|
|
maxDouble := -1
|
|
if long {
|
|
maxDouble = i
|
|
}
|
|
for double := -1; double <= maxDouble; double++ {
|
|
s := fmt.Sprintf("%d_%d", i, double+1)
|
|
code := gen(b, "testFunc"+s, "", "yield2", i, double, func(c int) bool { return true })
|
|
code1 := gen(b, "testSlice"+s, "_, ", "slice2", i, double, func(c int) bool { return true })
|
|
if code != code1 {
|
|
panic("bad generator")
|
|
}
|
|
tests += "test" + s + "()\n"
|
|
var all []int
|
|
for j := 0; j < code; j++ {
|
|
all = append(all, j)
|
|
}
|
|
p(b, testCode, "test"+s, all, "testFunc"+s, "testSlice"+s)
|
|
flush(false)
|
|
}
|
|
}
|
|
if long {
|
|
flush(true)
|
|
os.Remove("tmp.go")
|
|
return
|
|
}
|
|
|
|
p(b, mainCode, tests)
|
|
|
|
os.Stdout.Write(b.Bytes())
|
|
}
|
|
|
|
func p(b *bytes.Buffer, format string, args ...any) {
|
|
fmt.Fprintf(b, format, args...)
|
|
}
|
|
|
|
func gen(b *bytes.Buffer, name, prefix, rangeExpr string, depth, double int, allowed func(int) bool) int {
|
|
p(b, "func %s(o *output, code int) int {\n", name)
|
|
p(b, " dfr := 0; _ = dfr\n")
|
|
code := genLoop(b, 0, prefix, rangeExpr, depth, double, 0, "", allowed)
|
|
p(b, " return 0\n")
|
|
p(b, "}\n\n")
|
|
return code
|
|
}
|
|
|
|
func genLoop(b *bytes.Buffer, d int, prefix, rangeExpr string, depth, double, code int, labelSuffix string, allowed func(int) bool) int {
|
|
limit := 1
|
|
if d == double {
|
|
limit = 2
|
|
}
|
|
for rep := 0; rep < limit; rep++ {
|
|
if rep == 1 {
|
|
labelSuffix = "R"
|
|
}
|
|
s := fmt.Sprintf("%d%s", d, labelSuffix)
|
|
p(b, " o.log(`top%s`)\n", s)
|
|
p(b, " l%sa := 0\n", s)
|
|
p(b, "goto L%sa; L%sa: o.log(`L%sa`)\n", s, s, s)
|
|
p(b, " if l%sa++; l%sa >= 2 { o.log(`loop L%sa`); return -1 }\n", s, s, s)
|
|
p(b, " l%sfor := 0\n", s)
|
|
p(b, "goto L%sfor; L%sfor: for f := 0; f < 1; f++ { o.log(`L%sfor`)\n", s, s, s)
|
|
p(b, " if l%sfor++; l%sfor >= 2 { o.log(`loop L%sfor`); return -1 }\n", s, s, s)
|
|
p(b, " l%ssw := 0\n", s)
|
|
p(b, "goto L%ssw; L%ssw: switch { default: o.log(`L%ssw`)\n", s, s, s)
|
|
p(b, " if l%ssw++; l%ssw >= 2 { o.log(`loop L%ssw`); return -1 }\n", s, s, s)
|
|
p(b, " l%ssel := 0\n", s)
|
|
p(b, "goto L%ssel; L%ssel: select { default: o.log(`L%ssel`)\n", s, s, s)
|
|
p(b, " if l%ssel++; l%ssel >= 2 { o.log(`loop L%ssel`); return -1 }\n", s, s, s)
|
|
p(b, " l%s := 0\n", s)
|
|
p(b, "goto L%s; L%s: for %s i%s := range %s {\n", s, s, prefix, s, rangeExpr)
|
|
p(b, " o.log1(`L%s top`, i%s)\n", s, s)
|
|
p(b, " if l%s++; l%s >= 4 { o.log(`loop L%s`); return -1 }\n", s, s, s)
|
|
printTests := func() {
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { break }\n", code)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { continue }\n", code)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " switch { case code == %v: continue }\n", code)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { return %[1]v }\n", code)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { select { default: break } }\n", code)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { switch { default: break } }\n", code)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { dfr++; defer o.log1(`defer %d`, dfr) }\n", code, code)
|
|
}
|
|
for i := d; i > 0; i-- {
|
|
suffix := labelSuffix
|
|
if i < double {
|
|
suffix = ""
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { break L%d%s }\n", code, i, suffix)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { select { default: break L%d%s } }\n", code, i, suffix)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { break L%d%s }\n", code, i, suffix)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { break L%d%ssw }\n", code, i, suffix)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { break L%d%ssel }\n", code, i, suffix)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { break L%d%sfor }\n", code, i, suffix)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { continue L%d%sfor }\n", code, i, suffix)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { goto L%d%sa }\n", code, i, suffix)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { goto L%d%s }\n", code, i, suffix)
|
|
}
|
|
if code++; allowed(code) {
|
|
p(b, " if code == %v { goto L%d%sb }\n", code, i, suffix)
|
|
}
|
|
}
|
|
}
|
|
printTests()
|
|
if d < depth {
|
|
if rep == 1 {
|
|
double = d // signal to children to use the rep=1 labels
|
|
}
|
|
code = genLoop(b, d+1, prefix, rangeExpr, depth, double, code, labelSuffix, allowed)
|
|
printTests()
|
|
}
|
|
p(b, " o.log(`L%s bot`)\n", s)
|
|
p(b, " }\n")
|
|
p(b, " o.log(`L%ssel bot`)\n", s)
|
|
p(b, " }\n")
|
|
p(b, " o.log(`L%ssw bot`)\n", s)
|
|
p(b, " }\n")
|
|
p(b, " o.log(`L%sfor bot`)\n", s)
|
|
p(b, " }\n")
|
|
p(b, " o.log(`done%s`)\n", s)
|
|
p(b, "goto L%sb; L%sb: o.log(`L%sb`)\n", s, s, s)
|
|
}
|
|
return code
|
|
}
|
|
|
|
var testCode = `
|
|
func %s() {
|
|
all := %#v
|
|
for i := 0; i < len(all); i++ {
|
|
c := all[i]
|
|
outFunc := run(%s, c)
|
|
outSlice := run(%s, c)
|
|
if !outFunc.eq(outSlice) {
|
|
println("mismatch", "%[3]s", "%[4]s", c)
|
|
println()
|
|
println("func:")
|
|
outFunc.print()
|
|
println()
|
|
println("slice:")
|
|
outSlice.print()
|
|
panic("mismatch")
|
|
}
|
|
}
|
|
if verbose {
|
|
println("did", "%[3]s", "%[4]s", len(all))
|
|
}
|
|
}
|
|
`
|
|
|
|
var mainCode = `
|
|
|
|
func main() {
|
|
if verbose {
|
|
println("main")
|
|
}
|
|
%s
|
|
}
|
|
|
|
func yield2(yield func(int)bool) { _ = yield(1) && yield(2) }
|
|
var slice2 = []int{1,2}
|
|
|
|
type output struct {
|
|
ret int
|
|
trace []any
|
|
}
|
|
|
|
func (o *output) log(x any) {
|
|
o.trace = append(o.trace, x)
|
|
}
|
|
|
|
func (o *output) log1(x, y any) {
|
|
o.trace = append(o.trace, x, y)
|
|
}
|
|
|
|
func (o *output) eq(p *output) bool{
|
|
if o.ret != p.ret || len(o.trace) != len(p.trace) {
|
|
return false
|
|
}
|
|
for i ,x := range o.trace {
|
|
if x != p.trace[i] {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (o *output) print() {
|
|
println("ret", o.ret, "trace-len", len(o.trace))
|
|
for i := 0; i < len(o.trace); i++ {
|
|
print("#", i, " ")
|
|
switch x := o.trace[i].(type) {
|
|
case int:
|
|
print(x)
|
|
case string:
|
|
print(x)
|
|
default:
|
|
print(x)
|
|
}
|
|
print("\n")
|
|
}
|
|
}
|
|
|
|
func run(f func(*output, int)int, i int) *output {
|
|
o := &output{}
|
|
o.ret = f(o, i)
|
|
return o
|
|
}
|
|
|
|
`
|