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go/doc/progs/sum.go
Russ Cox da5a251dde doc: do not slice array literal
The special case in the spec is that you can take the
address of a composite literal using the & operator.

A composite literal is not, however, generally addressable,
and the slice operator requires an addressable argument,
so [3]int{1,2,3}[:] is invalid.  This tutorial code and one bug
report are the only places in the tree where it appears.

R=r, gri
CC=golang-dev
https://golang.org/cl/5437120
2011-12-02 12:30:37 -05:00

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Go

// 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
import "fmt"
func sum(a []int) int { // returns an int
s := 0
for i := 0; i < len(a); i++ {
s += a[i]
}
return s
}
func main() {
x := [3]int{1, 2, 3}
s := sum(x[:]) // a slice of the array is passed to sum
fmt.Print(s, "\n")
}