golang file 代码
文件路径：/misc/swig/stdio/file.go
/ Copyright 2017 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.
/ This file is here just to cause problems.
/ file.swig turns into a file also named file.go.
/ Make sure cmd/go keeps them separate
/ when both are passed to cgo.
package file
/int F(void) { return 1; }
import "C"
func F() int { return int(C.F()) }