golang main 代码
文件路径：/test/typeparam/factimp.dir/main.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 main
import (
"./a"
"fmt"
)
func main() {
const want = 120
if got := a.Fact(5); got != want {
panic(fmt.Sprintf("got %d, want %d", got, want))
}
if got := a.Fact[int64](5); got != want {
panic(fmt.Sprintf("got %d, want %d", got, want))
}
if got := a.Fact(5.0); got != want {
panic(fmt.Sprintf("got %f, want %f", got, want))
}
}