mirror of
https://github.com/golang/go
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57eb06fe93
X ,s;^// \$G (\$D/)?\$F\.go *$;// compile;g X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A *$;// build;g X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A && \./\$A\.out *$;// run;g X ,s;^// errchk \$G( -e)? (\$D/)?\$F\.go *$;// errorcheck;g R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/5671080
283 lines
3.8 KiB
Go
283 lines
3.8 KiB
Go
// run
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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:
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assert(false, "<")
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case i5 == 5:
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assert(true, "!")
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case i5 > 5:
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assert(false, ">")
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}
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switch {
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case i5 < 5:
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assert(false, "<")
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case i5 == 5:
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assert(true, "!")
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case i5 > 5:
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assert(false, ">")
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}
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switch x := 5; true {
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case i5 < x:
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assert(false, "<")
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case i5 == x:
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assert(true, "!")
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case i5 > x:
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assert(false, ">")
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}
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switch x := 5; true {
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case i5 < x:
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assert(false, "<")
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case i5 == x:
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assert(true, "!")
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case i5 > x:
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assert(false, ">")
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}
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switch i5 {
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case 0:
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assert(false, "0")
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case 1:
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assert(false, "1")
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case 2:
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assert(false, "2")
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case 3:
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assert(false, "3")
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case 4:
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assert(false, "4")
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case 5:
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assert(true, "5")
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case 6:
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assert(false, "6")
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case 7:
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assert(false, "7")
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case 8:
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assert(false, "8")
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case 9:
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assert(false, "9")
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default:
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assert(false, "default")
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}
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switch i5 {
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case 0, 1, 2, 3, 4:
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assert(false, "4")
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case 5:
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assert(true, "5")
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case 6, 7, 8, 9:
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assert(false, "9")
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default:
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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:
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assert(false, "4")
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case 5:
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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:
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assert(i5 == 5, "good")
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}
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switch i5 {
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case 0:
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dummy := 0
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_ = dummy
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fallthrough
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case 1:
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dummy := 0
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_ = dummy
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fallthrough
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case 2:
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dummy := 0
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_ = dummy
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fallthrough
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case 3:
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dummy := 0
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_ = dummy
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fallthrough
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case 4:
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dummy := 0
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_ = dummy
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assert(false, "4")
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case 5:
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dummy := 0
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_ = dummy
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fallthrough
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case 6:
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dummy := 0
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_ = dummy
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fallthrough
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case 7:
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dummy := 0
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_ = dummy
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fallthrough
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case 8:
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dummy := 0
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_ = dummy
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fallthrough
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case 9:
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dummy := 0
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_ = dummy
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fallthrough
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default:
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dummy := 0
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_ = dummy
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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:
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dummy := 0
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_ = dummy
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fallthrough // tests scoping of cases
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case 1:
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dummy := 0
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_ = dummy
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fallthrough
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case 2:
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dummy := 0
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_ = dummy
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fallthrough
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case 3:
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dummy := 0
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_ = dummy
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fallthrough
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case 4:
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dummy := 0
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_ = dummy
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assert(false, "4")
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case 5:
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dummy := 0
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_ = dummy
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fallthrough
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case 6:
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dummy := 0
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_ = dummy
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fallthrough
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case 7:
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dummy := 0
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_ = dummy
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fallthrough
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case 8:
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dummy := 0
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_ = dummy
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fallthrough
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case 9:
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dummy := 0
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_ = dummy
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fallthrough
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default:
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dummy := 0
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_ = dummy
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fired = !fired
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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:
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count = count + 1
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fallthrough
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case 1:
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count = count + 1
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fallthrough
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case 2:
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count = count + 1
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fallthrough
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case 3:
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count = count + 1
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fallthrough
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case 4:
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count = count + 1
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assert(false, "4")
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case 5:
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count = count + 1
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fallthrough
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case 6:
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count = count + 1
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fallthrough
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case 7:
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count = count + 1
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fallthrough
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case 8:
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count = count + 1
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fallthrough
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case 9:
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count = count + 1
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fallthrough
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default:
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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":
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assert(false, "wowie")
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case "hello":
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assert(true, "hello")
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case "jumpn":
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assert(false, "jumpn")
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default:
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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:
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fired = true
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default:
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assert(false, "fail")
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}
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assert(fired, "var")
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// switch on nil-only comparison types
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switch f := func() {}; f {
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case nil:
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assert(false, "f should not be nil")
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default:
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}
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switch m := make(map[int]int); m {
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case nil:
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assert(false, "m should not be nil")
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default:
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}
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switch a := make([]int, 1); a {
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case nil:
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assert(false, "m should not be nil")
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default:
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}
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}
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