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// $G $F.go && $L $F.$A && ./$A.out
// Copyright 2009 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.
package main
func assert(cond bool, msg string) {
if !cond {
print("assertion fail: ", msg, "\n")
panic(1)
}
}
func main() {
i5 := 5
i7 := 7
hello := "hello"
switch true {
case i5 < 5: assert(false, "<")
case i5 == 5: assert(true, "!")
case i5 > 5: assert(false, ">")
}
switch {
case i5 < 5: assert(false, "<")
case i5 == 5: assert(true, "!")
case i5 > 5: assert(false, ">")
}
switch x := 5; true {
case i5 < x: assert(false, "<")
case i5 == x: assert(true, "!")
case i5 > x: assert(false, ">")
}
switch x := 5; true {
case i5 < x: assert(false, "<")
case i5 == x: assert(true, "!")
case i5 > x: assert(false, ">")
}
switch i5 {
case 0: assert(false, "0")
case 1: assert(false, "1")
case 2: assert(false, "2")
case 3: assert(false, "3")
case 4: assert(false, "4")
case 5: assert(true, "5")
case 6: assert(false, "6")
case 7: assert(false, "7")
case 8: assert(false, "8")
case 9: assert(false, "9")
default: assert(false, "default")
}
switch i5 {
case 0,1,2,3,4: assert(false, "4")
case 5: assert(true, "5")
case 6,7,8,9: assert(false, "9")
default: assert(false, "default")
}
switch i5 {
case 0:
case 1:
case 2:
case 3:
case 4: assert(false, "4")
case 5: assert(true, "5")
case 6:
case 7:
case 8:
case 9:
default: assert(i5 == 5, "good")
}
switch i5 {
case 0: dummy := 0; _ = dummy; fallthrough
case 1: dummy := 0; _ = dummy; fallthrough
case 2: dummy := 0; _ = dummy; fallthrough
case 3: dummy := 0; _ = dummy; fallthrough
case 4: dummy := 0; _ = dummy; assert(false, "4")
case 5: dummy := 0; _ = dummy; fallthrough
case 6: dummy := 0; _ = dummy; fallthrough
case 7: dummy := 0; _ = dummy; fallthrough
case 8: dummy := 0; _ = dummy; fallthrough
case 9: dummy := 0; _ = dummy; fallthrough
default: dummy := 0; _ = dummy; assert(i5 == 5, "good")
}
fired := false
switch i5 {
case 0: dummy := 0; _ = dummy; fallthrough; // tests scoping of cases
case 1: dummy := 0; _ = dummy; fallthrough
case 2: dummy := 0; _ = dummy; fallthrough
case 3: dummy := 0; _ = dummy; fallthrough
case 4: dummy := 0; _ = dummy; assert(false, "4")
case 5: dummy := 0; _ = dummy; fallthrough
case 6: dummy := 0; _ = dummy; fallthrough
case 7: dummy := 0; _ = dummy; fallthrough
case 8: dummy := 0; _ = dummy; fallthrough
case 9: dummy := 0; _ = dummy; fallthrough
default: dummy := 0; _ = dummy; fired = !fired; assert(i5 == 5, "good")
}
assert(fired, "fired")
count := 0
switch i5 {
case 0: count = count + 1; fallthrough
case 1: count = count + 1; fallthrough
case 2: count = count + 1; fallthrough
case 3: count = count + 1; fallthrough
case 4: count = count + 1; assert(false, "4")
case 5: count = count + 1; fallthrough
case 6: count = count + 1; fallthrough
case 7: count = count + 1; fallthrough
case 8: count = count + 1; fallthrough
case 9: count = count + 1; fallthrough
default: assert(i5 == count, "good")
}
assert(fired, "fired")
switch hello {
case "wowie": assert(false, "wowie")
case "hello": assert(true, "hello")
case "jumpn": assert(false, "jumpn")
default: assert(false, "default")
}
fired = false
switch i := i5 + 2; i {
case i7: fired = true
default: assert(false, "fail")
}
assert(fired, "var")
}
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