// run

// Copyright 2020 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 (
	"log"
	"strconv"
)

type Setter[B any] interface {
	Set(string)
	type *B
}

func FromStrings[T any, PT Setter[T]](s []string) []T {
	result := make([]T, len(s))
	for i, v := range s {
		// The type of &result[i] is *T which is in the type list
		// of Setter, so we can convert it to PT.
		p := PT(&result[i])
		// PT has a Set method.
		p.Set(v)
	}
	return result
}

type Settable int

func (p *Settable) Set(s string) {
	i, err := strconv.Atoi(s)
	if err != nil {
		log.Fatal(err)
	}
	*p = Settable(i)
}

func main() {
	s := FromStrings[Settable, *Settable]([]string{"1"})
	if len(s) != 1 || s[0] != 1 {
		log.Fatalf("got %v, want %v", s, []int{1})
	}
}