interfacearg.go

     1  // run
     2  
     3  // Copyright 2021 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  package main
     8  
     9  type I interface{}
    10  
    11  type _S[T any] struct {
    12  	x *T
    13  }
    14  
    15  // F is a non-generic function, but has a type _S[I] which is instantiated from a
    16  // generic type. Test that _S[I] is successfully exported.
    17  func F() {
    18  	v := _S[I]{}
    19  	if v.x != nil {
    20  		panic(v)
    21  	}
    22  }
    23  
    24  // Testing the various combinations of method expressions.
    25  type S1 struct{}
    26  
    27  func (*S1) M() {}
    28  
    29  type S2 struct{}
    30  
    31  func (S2) M() {}
    32  
    33  func _F1[T interface{ M() }](t T) {
    34  	_ = T.M
    35  }
    36  
    37  func F2() {
    38  	_F1(&S1{})
    39  	_F1(S2{})
    40  	_F1(&S2{})
    41  }
    42  
    43  func main() {
    44  	F()
    45  	F2()
    46  }
    47
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