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| // run
|
| // 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.
|
| // Test functions and goroutines.
|
| package main
|
| func caller(f func(int, int) int, a, b int, c chan int) {
| c <- f(a, b)
| }
|
| func gocall(f func(int, int) int, a, b int) int {
| c := make(chan int)
| go caller(f, a, b, c)
| return <-c
| }
|
| func call(f func(int, int) int, a, b int) int {
| return f(a, b)
| }
|
| func call1(f func(int, int) int, a, b int) int {
| return call(f, a, b)
| }
|
| var f func(int, int) int
|
| func add(x, y int) int {
| return x + y
| }
|
| func fn() func(int, int) int {
| return f
| }
|
| var fc func(int, int, chan int)
|
| func addc(x, y int, c chan int) {
| c <- x+y
| }
|
| func fnc() func(int, int, chan int) {
| return fc
| }
|
| func three(x int) {
| if x != 3 {
| println("wrong val", x)
| panic("fail")
| }
| }
|
| var notmain func()
|
| func emptyresults() {}
| func noresults() {}
|
| var nothing func()
|
| func main() {
| three(call(add, 1, 2))
| three(call1(add, 1, 2))
| f = add
| three(call(f, 1, 2))
| three(call1(f, 1, 2))
| three(call(fn(), 1, 2))
| three(call1(fn(), 1, 2))
| three(call(func(a, b int) int { return a + b }, 1, 2))
| three(call1(func(a, b int) int { return a + b }, 1, 2))
|
| fc = addc
| c := make(chan int)
| go addc(1, 2, c)
| three(<-c)
| go fc(1, 2, c)
| three(<-c)
| go fnc()(1, 2, c)
| three(<-c)
| go func(a, b int, c chan int) { c <- a+b }(1, 2, c)
| three(<-c)
|
| emptyresults()
| noresults()
| nothing = emptyresults
| nothing()
| nothing = noresults
| nothing()
| }
|
|
