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98f3d7fecb
CL 294430 made packages in std and cmd modules use Go 1.17 gofmt format, adding //go:build lines. This change applies the same formatting to some more packages that 'go fmt' missed (e.g., syscall/js, runtime/msan), and everything else that is easy and safe to modify in bulk. Consider the top-level test directory, testdata, and vendor directories out of scope, since there are many files that don't follow strict gofmt formatting, often for intentional and legitimate reasons (testing gofmt itself, invalid Go programs that shouldn't crash the compiler, etc.). That makes it easy and safe to gofmt -w the .go files that are found with gofmt -l with aforementioned directories filtered out: $ gofmt -l . 2>/dev/null | \ grep -v '^test/' | \ grep -v '/testdata/' | \ grep -v '/vendor/' | wc -l 51 None of the 51 files are generated. After this change, the same command prints 0. For #41184. Change-Id: Ia96ee2a0f998d6a167d4473bcad17ad09bc1d86e Reviewed-on: https://go-review.googlesource.com/c/go/+/341009 Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Trust: Dmitri Shuralyov <dmitshur@golang.org>
47 lines
936 B
Go
47 lines
936 B
Go
// 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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//go:build ignore
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// +build ignore
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// Compute Fibonacci numbers with two goroutines
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// that pass integers back and forth. No actual
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// concurrency, just threads and synchronization
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// and foreign code on multiple pthreads.
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package main
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import (
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big "."
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"runtime"
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)
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func fibber(c chan *big.Int, out chan string, n int64) {
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// Keep the fibbers in dedicated operating system
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// threads, so that this program tests coordination
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// between pthreads and not just goroutines.
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runtime.LockOSThread()
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i := big.NewInt(n)
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if n == 0 {
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c <- i
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}
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for {
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j := <-c
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out <- j.String()
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i.Add(i, j)
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c <- i
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}
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}
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func main() {
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c := make(chan *big.Int)
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out := make(chan string)
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go fibber(c, out, 0)
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go fibber(c, out, 1)
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for i := 0; i < 200; i++ {
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println(<-out)
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}
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}
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