// 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.
// This file contains tests for the useless-assignment checker.
package testdata
import "math/rand"
type ST[T interface{ ~int }] struct {
x T
l []T
}
func (s *ST[T]) SetX(x T, ch chan T) {
// Accidental self-assignment; it should be "s.x = x"
// want "self-assignment of x to x"
// Another mistake
// want "self-assignment of s.x to s.x"
// want "self-assignment of s.l.0. to s.l.0."
// Bail on any potential side effects to avoid false positives
s.l[num()] = s.l[num()]
rng := rand.New(rand.NewSource(0))
s.l[rng.Intn(len(s.l))] = s.l[rng.Intn(len(s.l))]
s.l[<-ch] = s.l[<-ch]
}
func num() int { return 2 }