| // 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 |
| |
| func f1[P interface{ *P }]() {} |
| func f2[P interface{ func(P) }]() {} |
| func f3[P, Q interface{ func(Q) P }]() {} |
| func f4[P interface{ *Q }, Q interface{ func(P) }]() {} |
| func f5[P interface{ func(P) }]() {} |
| func f6[P interface { *Tree[P] }, Q any ]() {} |
| |
| func _() { |
| f1( /* ERROR cannot infer P */ ) |
| f2( /* ERROR cannot infer P */ ) |
| f3( /* ERROR cannot infer P */ ) |
| f4( /* ERROR cannot infer P */ ) |
| f5( /* ERROR cannot infer P */ ) |
| f6( /* ERROR cannot infer P */ ) |
| } |
| |
| type Tree[P any] struct { |
| left, right *Tree[P] |
| data P |
| } |
| |
| // test case from issue |
| |
| func foo[Src interface { func() Src }]() Src { |
| return foo[Src] |
| } |
| |
| func _() { |
| foo( /* ERROR cannot infer Src */ ) |
| } |
