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https://github.com/golang/go
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![Russ Cox](/assets/img/avatar_default.png)
No longer a distinct type; now a property of func types. R=ken2 CC=golang-dev https://golang.org/cl/197042
106 lines
1.8 KiB
Go
106 lines
1.8 KiB
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2010 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 sum(args ...int) int {
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s := 0
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for _, v := range args {
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s += v
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}
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return s
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}
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func sumA(args []int) int {
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s := 0
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for _, v := range args {
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s += v
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}
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return s
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}
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func sum2(args ...int) int { return 2 * sum(args) }
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func sum3(args ...int) int { return 3 * sumA(args) }
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func intersum(args ...interface{}) int {
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s := 0
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for _, v := range args {
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s += v.(int)
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}
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return s
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}
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type T []T
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func ln(args ...T) int { return len(args) }
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func ln2(args ...T) int { return 2 * ln(args) }
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func main() {
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if x := sum(1, 2, 3); x != 6 {
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panicln("sum 6", x)
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}
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if x := sum(); x != 0 {
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panicln("sum 0", x)
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}
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if x := sum(10); x != 10 {
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panicln("sum 10", x)
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}
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if x := sum(1, 8); x != 9 {
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panicln("sum 9", x)
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}
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if x := sum2(1, 2, 3); x != 2*6 {
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panicln("sum 6", x)
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}
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if x := sum2(); x != 2*0 {
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panicln("sum 0", x)
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}
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if x := sum2(10); x != 2*10 {
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panicln("sum 10", x)
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}
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if x := sum2(1, 8); x != 2*9 {
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panicln("sum 9", x)
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}
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if x := sum3(1, 2, 3); x != 3*6 {
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panicln("sum 6", x)
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}
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if x := sum3(); x != 3*0 {
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panicln("sum 0", x)
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}
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if x := sum3(10); x != 3*10 {
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panicln("sum 10", x)
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}
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if x := sum3(1, 8); x != 3*9 {
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panicln("sum 9", x)
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}
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if x := intersum(1, 2, 3); x != 6 {
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panicln("intersum 6", x)
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}
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if x := intersum(); x != 0 {
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panicln("intersum 0", x)
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}
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if x := intersum(10); x != 10 {
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panicln("intersum 10", x)
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}
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if x := intersum(1, 8); x != 9 {
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panicln("intersum 9", x)
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}
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if x := ln(nil, nil, nil); x != 3 {
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panicln("ln 3", x)
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}
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if x := ln([]T{}); x != 1 {
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panicln("ln 1", x)
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}
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if x := ln2(nil, nil, nil); x != 2*3 {
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panicln("ln2 3", x)
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}
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if x := ln2([]T{}); x != 2*1 {
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panicln("ln2 1", x)
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}
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}
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