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49 lines
794 B
Go
49 lines
794 B
Go
// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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// See page 150.
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// Defer1 demonstrates a deferred call being invoked during a panic.
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package main
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import "fmt"
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//!+f
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func main() {
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f(3)
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}
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func f(x int) {
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fmt.Printf("f(%d)\n", x+0/x) // panics if x == 0
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defer fmt.Printf("defer %d\n", x)
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f(x - 1)
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}
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//!-f
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/*
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//!+stdout
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f(3)
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f(2)
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f(1)
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defer 1
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defer 2
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defer 3
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//!-stdout
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//!+stderr
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panic: runtime error: integer divide by zero
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main.f(0)
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src/gopl.io/ch5/defer1/defer.go:14
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main.f(1)
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src/gopl.io/ch5/defer1/defer.go:16
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main.f(2)
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src/gopl.io/ch5/defer1/defer.go:16
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main.f(3)
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src/gopl.io/ch5/defer1/defer.go:16
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main.main()
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src/gopl.io/ch5/defer1/defer.go:10
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//!-stderr
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*/
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