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// 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 a

func Conv(v interface{}) string {
	return conv[string](v)
}

func conv[T any](v interface{}) T {
	return v.(T)
}

func Conv2(v interface{}) (string, bool) {
	return conv2[string](v)
}

func conv2[T any](v interface{}) (T, bool) {
	x, ok := v.(T)
	return x, ok
}

func Conv3(v interface{}) string {
	return conv3[string](v)
}

func conv3[T any](v interface{}) T {
	switch v := v.(type) {
	case T:
		return v
	default:
		var z T
		return z
	}
}

type Mystring string

func (Mystring) Foo() {
}

func Conv4(v interface{Foo()}) Mystring {
	return conv4[Mystring](v)
}

func conv4[T interface{Foo()}](v interface{Foo()}) T {
	switch v := v.(type) {
	case T:
		return v
	default:
		var z T
		return z
	}
}