| // 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 p |
| |
| import "unsafe" |
| |
| // The actual example from the issue. |
| type List[P any] struct{} |
| |
| func (_ List[P]) m() (_ List[List[P]]) { return } |
| |
| // Other types of recursion through methods. |
| type R[P any] int |
| |
| func (*R[R /* ERROR "must be an identifier" */ [int]]) m0() {} |
| func (R[P]) m1(R[R[P]]) {} |
| func (R[P]) m2(R[*P]) {} |
| func (R[P]) m3([unsafe.Sizeof(new(R[P]))]int) {} |
| func (R[P]) m4([unsafe.Sizeof(new(R[R[P]]))]int) {} |
| |
| // Mutual recursion |
| type M[P any] int |
| |
| func (R[P]) m5(M[M[P]]) {} |
| func (M[P]) m(R[R[P]]) {} |
