issue77635b.go

     1  // compile
     2  
     3  // Copyright 2026 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  // Issue 77635: test building values of zero-sized types.
     8  
     9  package p
    10  
    11  type T1 [2][0]int
    12  type T2 [0][2]int
    13  type T3 struct {
    14  	t T1
    15  	x *byte
    16  }
    17  type T4 struct {
    18  	t T2
    19  	x *byte
    20  }
    21  
    22  func f1(t T1) any {
    23  	return t
    24  }
    25  func f2(t T2) any {
    26  	return t
    27  }
    28  func f3(t T3) any {
    29  	return t
    30  }
    31  func f4(t T4) any {
    32  	return t
    33  }
    34  func f5(t T1) any {
    35  	return T3{t:t}
    36  }
    37  func f6(t T2) any {
    38  	return T4{t:t}
    39  }
    40  func f7(t T1) {
    41  	use(T3{t:t})
    42  }
    43  func f8(t T2) {
    44  	use(T4{t:t})
    45  }
    46  
    47  func g1(t T3, i int) {
    48  	t.t[i][i] = 1
    49  }
    50  func g2(t T4, i int) {
    51  	t.t[i][i] = 1
    52  }
    53  func g3(t *T3, i int) {
    54  	t.t[i][i] = 1
    55  }
    56  func g4(t *T4, i int) {
    57  	t.t[i][i] = 1
    58  }
    59  
    60  //go:noinline
    61  func use(x any) {
    62  }
    63
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