mirror of
https://github.com/golang/go
synced 2024-11-19 04:14:45 -07:00
bf87b9f0f5
- remove Makefile - move test data into a subdirectory - encapsulate the invocation of errchk into a standard Test using os.exec R=golang-dev, minux.ma, rsc CC=golang-dev https://golang.org/cl/9509045
2121 lines
23 KiB
Go
2121 lines
23 KiB
Go
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build ignore
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// This file contains tests for the dead code checker.
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package testdata
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type T int
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var x interface{}
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var c chan int
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func external() int // ok
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func _() int {
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}
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func _() int {
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print(1)
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}
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func _() int {
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print(1)
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return 2
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println() // ERROR "unreachable code"
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}
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func _() int {
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L:
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print(1)
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goto L
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println() // ERROR "unreachable code"
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}
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func _() int {
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print(1)
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panic(2)
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println() // ERROR "unreachable code"
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}
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// but only builtin panic
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func _() int {
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var panic = func(int) {}
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print(1)
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panic(2)
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println() // ok
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}
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func _() int {
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{
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print(1)
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return 2
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println() // ERROR "unreachable code"
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}
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println() // ok
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}
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func _() int {
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{
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print(1)
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return 2
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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L:
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{
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print(1)
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goto L
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println() // ERROR "unreachable code"
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}
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println() // ok
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}
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func _() int {
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L:
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{
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print(1)
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goto L
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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print(1)
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{
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panic(2)
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}
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}
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func _() int {
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print(1)
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{
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panic(2)
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println() // ERROR "unreachable code"
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}
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}
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func _() int {
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print(1)
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{
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panic(2)
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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print(1)
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return 2
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{ // ERROR "unreachable code"
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}
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}
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func _() int {
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L:
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print(1)
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goto L
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{ // ERROR "unreachable code"
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}
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}
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func _() int {
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print(1)
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panic(2)
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{ // ERROR "unreachable code"
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}
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}
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func _() int {
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{
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print(1)
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return 2
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{ // ERROR "unreachable code"
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}
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}
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}
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func _() int {
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L:
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{
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print(1)
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goto L
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{ // ERROR "unreachable code"
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}
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}
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}
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func _() int {
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print(1)
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{
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panic(2)
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{ // ERROR "unreachable code"
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}
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}
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}
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func _() int {
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{
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print(1)
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return 2
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}
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{ // ERROR "unreachable code"
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}
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}
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func _() int {
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L:
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{
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print(1)
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goto L
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}
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{ // ERROR "unreachable code"
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}
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}
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func _() int {
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print(1)
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{
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panic(2)
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}
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{ // ERROR "unreachable code"
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}
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}
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func _() int {
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print(1)
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if x == nil {
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panic(2)
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} else {
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panic(3)
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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L:
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print(1)
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if x == nil {
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panic(2)
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} else {
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goto L
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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L:
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print(1)
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if x == nil {
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panic(2)
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} else if x == 1 {
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return 0
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} else if x != 2 {
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panic(3)
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} else {
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goto L
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}
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println() // ERROR "unreachable code"
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}
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// if-else chain missing final else is not okay, even if the
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// conditions cover every possible case.
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func _() int {
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print(1)
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if x == nil {
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panic(2)
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} else if x != nil {
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panic(3)
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}
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println() // ok
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}
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func _() int {
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print(1)
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if x == nil {
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panic(2)
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}
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println() // ok
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}
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func _() int {
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L:
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print(1)
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if x == nil {
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panic(2)
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} else if x == 1 {
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return 0
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} else if x != 1 {
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panic(3)
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}
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println() // ok
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}
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func _() int {
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print(1)
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for {
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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for {
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for {
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break
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}
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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for {
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for {
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break
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println() // ERROR "unreachable code"
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}
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}
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}
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func _() int {
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for {
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for {
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continue
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println() // ERROR "unreachable code"
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}
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}
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}
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func _() int {
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for {
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L:
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for {
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break L
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}
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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print(1)
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for {
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break
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}
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println() // ok
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}
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func _() int {
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for {
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for {
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}
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break // ERROR "unreachable code"
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}
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println() // ok
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}
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func _() int {
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L:
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for {
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for {
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break L
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}
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}
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println() // ok
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}
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func _() int {
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print(1)
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for x == nil {
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}
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println() // ok
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}
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func _() int {
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for x == nil {
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for {
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break
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}
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}
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println() // ok
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}
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func _() int {
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for x == nil {
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L:
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for {
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break L
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}
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}
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println() // ok
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}
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func _() int {
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print(1)
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for true {
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}
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println() // ok
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}
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func _() int {
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for true {
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for {
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break
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}
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}
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println() // ok
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}
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func _() int {
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for true {
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L:
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for {
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break L
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}
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}
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println() // ok
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}
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func _() int {
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print(1)
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select {}
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println() // ERROR "unreachable code"
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}
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func _() int {
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print(1)
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select {
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case <-c:
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print(2)
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panic("abc")
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println() // ERROR "unreachable code"
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}
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}
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func _() int {
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print(1)
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select {
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case <-c:
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print(2)
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panic("abc")
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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print(1)
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select {
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case <-c:
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print(2)
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for {
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}
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println() // ERROR "unreachable code"
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}
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}
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func _() int {
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print(1)
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select {
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case <-c:
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print(2)
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for {
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}
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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L:
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print(1)
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select {
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case <-c:
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print(2)
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panic("abc")
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println() // ERROR "unreachable code"
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case c <- 1:
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print(2)
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goto L
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println() // ERROR "unreachable code"
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}
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}
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func _() int {
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L:
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print(1)
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select {
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case <-c:
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print(2)
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panic("abc")
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case c <- 1:
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print(2)
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goto L
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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print(1)
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select {
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case <-c:
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print(2)
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panic("abc")
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println() // ERROR "unreachable code"
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default:
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select {}
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println() // ERROR "unreachable code"
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}
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}
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func _() int {
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print(1)
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select {
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case <-c:
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print(2)
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panic("abc")
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default:
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select {}
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}
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println() // ERROR "unreachable code"
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}
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func _() int {
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print(1)
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select {
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case <-c:
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print(2)
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}
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println() // ok
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}
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func _() int {
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L:
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print(1)
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select {
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case <-c:
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print(2)
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panic("abc")
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goto L // ERROR "unreachable code"
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case c <- 1:
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print(2)
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}
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println() // ok
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}
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func _() int {
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print(1)
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select {
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case <-c:
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print(2)
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panic("abc")
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default:
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print(2)
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}
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println() // ok
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}
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func _() int {
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print(1)
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select {
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default:
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break
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}
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println() // ok
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}
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func _() int {
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print(1)
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select {
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case <-c:
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print(2)
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panic("abc")
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break // ERROR "unreachable code"
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}
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println() // ok
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}
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func _() int {
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print(1)
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L:
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select {
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case <-c:
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print(2)
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for {
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break L
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}
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}
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println() // ok
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}
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func _() int {
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print(1)
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L:
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select {
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case <-c:
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print(2)
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panic("abc")
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case c <- 1:
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print(2)
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break L
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}
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println() // ok
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}
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func _() int {
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print(1)
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select {
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case <-c:
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print(1)
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panic("abc")
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default:
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select {}
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break // ERROR "unreachable code"
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}
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println() // ok
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}
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func _() int {
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print(1)
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switch x {
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case 1:
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print(2)
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panic(3)
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println() // ERROR "unreachable code"
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default:
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return 4
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println() // ERROR "unreachable code"
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}
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}
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func _() int {
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print(1)
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switch x {
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case 1:
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print(2)
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panic(3)
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default:
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return 4
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}
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println() // ERROR "unreachable code"
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}
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|
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func _() int {
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print(1)
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switch x {
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default:
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return 4
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println() // ERROR "unreachable code"
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case 1:
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print(2)
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panic(3)
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println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
func _() int {
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print(1)
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switch x {
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default:
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return 4
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case 1:
|
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print(2)
|
|
panic(3)
|
|
}
|
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println() // ERROR "unreachable code"
|
|
}
|
|
|
|
func _() int {
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print(1)
|
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switch x {
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case 1:
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print(2)
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fallthrough
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default:
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return 4
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println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
func _() int {
|
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print(1)
|
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switch x {
|
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case 1:
|
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print(2)
|
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fallthrough
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|
default:
|
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return 4
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|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
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switch {
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}
|
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println() // ok
|
|
}
|
|
|
|
func _() int {
|
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print(1)
|
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switch x {
|
|
case 1:
|
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print(2)
|
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panic(3)
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case 2:
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return 4
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}
|
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println() // ok
|
|
}
|
|
|
|
func _() int {
|
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print(1)
|
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switch x {
|
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case 2:
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return 4
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case 1:
|
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print(2)
|
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panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x {
|
|
case 1:
|
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print(2)
|
|
fallthrough
|
|
case 2:
|
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return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x {
|
|
case 1:
|
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print(2)
|
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panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
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|
|
func _() int {
|
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print(1)
|
|
L:
|
|
switch x {
|
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case 1:
|
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print(2)
|
|
panic(3)
|
|
break L // ERROR "unreachable code"
|
|
default:
|
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return 4
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}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x {
|
|
default:
|
|
return 4
|
|
break // ERROR "unreachable code"
|
|
case 1:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
L:
|
|
switch x {
|
|
case 1:
|
|
print(2)
|
|
for {
|
|
break L
|
|
}
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
println() // ERROR "unreachable code"
|
|
default:
|
|
return 4
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
default:
|
|
return 4
|
|
println() // ERROR "unreachable code"
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
default:
|
|
return 4
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
fallthrough
|
|
default:
|
|
return 4
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
fallthrough
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch {
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
case float64:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case float64:
|
|
return 4
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
fallthrough
|
|
case float64:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
L:
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
break L // ERROR "unreachable code"
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
default:
|
|
return 4
|
|
break // ERROR "unreachable code"
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
print(1)
|
|
L:
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
for {
|
|
break L
|
|
}
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
// again, but without the leading print(1).
|
|
// testing that everything works when the terminating statement is first.
|
|
|
|
func _() int {
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
return 2
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
func _() int {
|
|
L:
|
|
goto L
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
func _() int {
|
|
panic(2)
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
// but only builtin panic
|
|
func _() int {
|
|
var panic = func(int) {}
|
|
panic(2)
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
{
|
|
return 2
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
func _() int {
|
|
{
|
|
return 2
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
func _() int {
|
|
L:
|
|
{
|
|
goto L
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
func _() int {
|
|
L:
|
|
{
|
|
goto L
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
func _() int {
|
|
{
|
|
panic(2)
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
func _() int {
|
|
{
|
|
panic(2)
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
func _() int {
|
|
return 2
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
L:
|
|
goto L
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
panic(2)
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
{
|
|
return 2
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
L:
|
|
{
|
|
goto L
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
{
|
|
panic(2)
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
{
|
|
return 2
|
|
}
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
L:
|
|
{
|
|
goto L
|
|
}
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
func _() int {
|
|
{
|
|
panic(2)
|
|
}
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
// again, with func literals
|
|
|
|
var _ = func() int {
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
return 2
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
print(1)
|
|
goto L
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
panic(2)
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
// but only builtin panic
|
|
var _ = func() int {
|
|
var panic = func(int) {}
|
|
print(1)
|
|
panic(2)
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
print(1)
|
|
return 2
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
print(1)
|
|
return 2
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
{
|
|
print(1)
|
|
goto L
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
{
|
|
print(1)
|
|
goto L
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
{
|
|
panic(2)
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
{
|
|
panic(2)
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
{
|
|
panic(2)
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
return 2
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
print(1)
|
|
goto L
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
panic(2)
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
print(1)
|
|
return 2
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
{
|
|
print(1)
|
|
goto L
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
{
|
|
panic(2)
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
print(1)
|
|
return 2
|
|
}
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
{
|
|
print(1)
|
|
goto L
|
|
}
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
{
|
|
panic(2)
|
|
}
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
if x == nil {
|
|
panic(2)
|
|
} else {
|
|
panic(3)
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
print(1)
|
|
if x == nil {
|
|
panic(2)
|
|
} else {
|
|
goto L
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
print(1)
|
|
if x == nil {
|
|
panic(2)
|
|
} else if x == 1 {
|
|
return 0
|
|
} else if x != 2 {
|
|
panic(3)
|
|
} else {
|
|
goto L
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
// if-else chain missing final else is not okay, even if the
|
|
// conditions cover every possible case.
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
if x == nil {
|
|
panic(2)
|
|
} else if x != nil {
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
if x == nil {
|
|
panic(2)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
print(1)
|
|
if x == nil {
|
|
panic(2)
|
|
} else if x == 1 {
|
|
return 0
|
|
} else if x != 1 {
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
for {
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
for {
|
|
for {
|
|
break
|
|
}
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
for {
|
|
for {
|
|
break
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
for {
|
|
for {
|
|
continue
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
for {
|
|
L:
|
|
for {
|
|
break L
|
|
}
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
for {
|
|
break
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
for {
|
|
for {
|
|
}
|
|
break // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
for {
|
|
for {
|
|
break L
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
for x == nil {
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
for x == nil {
|
|
for {
|
|
break
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
for x == nil {
|
|
L:
|
|
for {
|
|
break L
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
for true {
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
for true {
|
|
for {
|
|
break
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
for true {
|
|
L:
|
|
for {
|
|
break L
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
panic("abc")
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
panic("abc")
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
for {
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
for {
|
|
}
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
panic("abc")
|
|
println() // ERROR "unreachable code"
|
|
case c <- 1:
|
|
print(2)
|
|
goto L
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
panic("abc")
|
|
case c <- 1:
|
|
print(2)
|
|
goto L
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
panic("abc")
|
|
println() // ERROR "unreachable code"
|
|
default:
|
|
select {}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
panic("abc")
|
|
default:
|
|
select {}
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
panic("abc")
|
|
goto L // ERROR "unreachable code"
|
|
case c <- 1:
|
|
print(2)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
panic("abc")
|
|
default:
|
|
print(2)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
default:
|
|
break
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
panic("abc")
|
|
break // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
L:
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
for {
|
|
break L
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
L:
|
|
select {
|
|
case <-c:
|
|
print(2)
|
|
panic("abc")
|
|
case c <- 1:
|
|
print(2)
|
|
break L
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
select {
|
|
case <-c:
|
|
print(1)
|
|
panic("abc")
|
|
default:
|
|
select {}
|
|
break // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
case 1:
|
|
print(2)
|
|
panic(3)
|
|
println() // ERROR "unreachable code"
|
|
default:
|
|
return 4
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
case 1:
|
|
print(2)
|
|
panic(3)
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
default:
|
|
return 4
|
|
println() // ERROR "unreachable code"
|
|
case 1:
|
|
print(2)
|
|
panic(3)
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
default:
|
|
return 4
|
|
case 1:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
case 1:
|
|
print(2)
|
|
fallthrough
|
|
default:
|
|
return 4
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
case 1:
|
|
print(2)
|
|
fallthrough
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch {
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
case 1:
|
|
print(2)
|
|
panic(3)
|
|
case 2:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
case 2:
|
|
return 4
|
|
case 1:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
case 1:
|
|
print(2)
|
|
fallthrough
|
|
case 2:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
case 1:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
L:
|
|
switch x {
|
|
case 1:
|
|
print(2)
|
|
panic(3)
|
|
break L // ERROR "unreachable code"
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x {
|
|
default:
|
|
return 4
|
|
break // ERROR "unreachable code"
|
|
case 1:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
L:
|
|
switch x {
|
|
case 1:
|
|
print(2)
|
|
for {
|
|
break L
|
|
}
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
println() // ERROR "unreachable code"
|
|
default:
|
|
return 4
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
default:
|
|
return 4
|
|
println() // ERROR "unreachable code"
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
default:
|
|
return 4
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
fallthrough
|
|
default:
|
|
return 4
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
fallthrough
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch {
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
case float64:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case float64:
|
|
return 4
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
fallthrough
|
|
case float64:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
L:
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
break L // ERROR "unreachable code"
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
switch x.(type) {
|
|
default:
|
|
return 4
|
|
break // ERROR "unreachable code"
|
|
case int:
|
|
print(2)
|
|
panic(3)
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
print(1)
|
|
L:
|
|
switch x.(type) {
|
|
case int:
|
|
print(2)
|
|
for {
|
|
break L
|
|
}
|
|
default:
|
|
return 4
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
// again, but without the leading print(1).
|
|
// testing that everything works when the terminating statement is first.
|
|
|
|
var _ = func() int {
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
return 2
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
goto L
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
panic(2)
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
// but only builtin panic
|
|
var _ = func() int {
|
|
var panic = func(int) {}
|
|
panic(2)
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
return 2
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
return 2
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
{
|
|
goto L
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
{
|
|
goto L
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
panic(2)
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
panic(2)
|
|
}
|
|
println() // ERROR "unreachable code"
|
|
}
|
|
|
|
var _ = func() int {
|
|
return 2
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
goto L
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
panic(2)
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
return 2
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
{
|
|
goto L
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
panic(2)
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
return 2
|
|
}
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
L:
|
|
{
|
|
goto L
|
|
}
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|
|
|
|
var _ = func() int {
|
|
{
|
|
panic(2)
|
|
}
|
|
{ // ERROR "unreachable code"
|
|
}
|
|
println() // ok
|
|
}
|