mirror of
https://github.com/golang/go
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4f61fc96b2
The ken directory is untouched so we have some examples with explicit semis. R=gri CC=golang-dev https://golang.org/cl/2157041
140 lines
3.3 KiB
Go
140 lines
3.3 KiB
Go
// $G $F.go && $L $F.$A && ./$A.out
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// Copyright 2009 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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package main
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func assert(cond bool, msg string) {
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if !cond {
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print("assertion fail: ", msg, "\n")
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panic(1)
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}
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}
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func main() {
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i5 := 5
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i7 := 7
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hello := "hello"
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switch true {
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case i5 < 5: assert(false, "<")
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case i5 == 5: assert(true, "!")
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case i5 > 5: assert(false, ">")
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}
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switch {
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case i5 < 5: assert(false, "<")
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case i5 == 5: assert(true, "!")
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case i5 > 5: assert(false, ">")
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}
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switch x := 5; true {
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case i5 < x: assert(false, "<")
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case i5 == x: assert(true, "!")
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case i5 > x: assert(false, ">")
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}
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switch x := 5; true {
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case i5 < x: assert(false, "<")
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case i5 == x: assert(true, "!")
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case i5 > x: assert(false, ">")
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}
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switch i5 {
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case 0: assert(false, "0")
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case 1: assert(false, "1")
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case 2: assert(false, "2")
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case 3: assert(false, "3")
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case 4: assert(false, "4")
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case 5: assert(true, "5")
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case 6: assert(false, "6")
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case 7: assert(false, "7")
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case 8: assert(false, "8")
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case 9: assert(false, "9")
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default: assert(false, "default")
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}
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switch i5 {
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case 0,1,2,3,4: assert(false, "4")
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case 5: assert(true, "5")
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case 6,7,8,9: assert(false, "9")
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default: assert(false, "default")
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}
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switch i5 {
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case 0:
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case 1:
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case 2:
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case 3:
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case 4: assert(false, "4")
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case 5: assert(true, "5")
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case 6:
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case 7:
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case 8:
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case 9:
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default: assert(i5 == 5, "good")
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}
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switch i5 {
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case 0: dummy := 0; _ = dummy; fallthrough
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case 1: dummy := 0; _ = dummy; fallthrough
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case 2: dummy := 0; _ = dummy; fallthrough
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case 3: dummy := 0; _ = dummy; fallthrough
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case 4: dummy := 0; _ = dummy; assert(false, "4")
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case 5: dummy := 0; _ = dummy; fallthrough
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case 6: dummy := 0; _ = dummy; fallthrough
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case 7: dummy := 0; _ = dummy; fallthrough
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case 8: dummy := 0; _ = dummy; fallthrough
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case 9: dummy := 0; _ = dummy; fallthrough
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default: dummy := 0; _ = dummy; assert(i5 == 5, "good")
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}
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fired := false
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switch i5 {
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case 0: dummy := 0; _ = dummy; fallthrough; // tests scoping of cases
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case 1: dummy := 0; _ = dummy; fallthrough
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case 2: dummy := 0; _ = dummy; fallthrough
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case 3: dummy := 0; _ = dummy; fallthrough
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case 4: dummy := 0; _ = dummy; assert(false, "4")
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case 5: dummy := 0; _ = dummy; fallthrough
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case 6: dummy := 0; _ = dummy; fallthrough
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case 7: dummy := 0; _ = dummy; fallthrough
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case 8: dummy := 0; _ = dummy; fallthrough
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case 9: dummy := 0; _ = dummy; fallthrough
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default: dummy := 0; _ = dummy; fired = !fired; assert(i5 == 5, "good")
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}
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assert(fired, "fired")
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count := 0
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switch i5 {
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case 0: count = count + 1; fallthrough
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case 1: count = count + 1; fallthrough
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case 2: count = count + 1; fallthrough
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case 3: count = count + 1; fallthrough
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case 4: count = count + 1; assert(false, "4")
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case 5: count = count + 1; fallthrough
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case 6: count = count + 1; fallthrough
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case 7: count = count + 1; fallthrough
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case 8: count = count + 1; fallthrough
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case 9: count = count + 1; fallthrough
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default: assert(i5 == count, "good")
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}
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assert(fired, "fired")
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switch hello {
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case "wowie": assert(false, "wowie")
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case "hello": assert(true, "hello")
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case "jumpn": assert(false, "jumpn")
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default: assert(false, "default")
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}
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fired = false
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switch i := i5 + 2; i {
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case i7: fired = true
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default: assert(false, "fail")
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}
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assert(fired, "var")
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}
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