golang whole_function_external 代码
文件路径：/src/go/doc/testdata/examples/whole_function_external.go
// Copyright 2021 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 foo_test
func foo(int)
func Example() {
foo(42)
// Output:
}