Source file test/typeparam/pair.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  import (
    10  	"fmt"
    11  	"unsafe"
    12  )
    13  
    14  type pair[F1, F2 any] struct {
    15  	f1 F1
    16  	f2 F2
    17  }
    18  
    19  func main() {
    20  	p := pair[int32, int64]{1, 2}
    21  	if got, want := unsafe.Sizeof(p.f1), uintptr(4); got != want {
    22  		panic(fmt.Sprintf("unexpected f1 size == %d, want %d", got, want))
    23  	}
    24  	if got, want := unsafe.Sizeof(p.f2), uintptr(8); got != want {
    25  		panic(fmt.Sprintf("unexpected f2 size == %d, want %d", got, want))
    26  	}
    27  
    28  	type mypair struct {
    29  		f1 int32
    30  		f2 int64
    31  	}
    32  	mp := mypair(p)
    33  	if mp.f1 != 1 || mp.f2 != 2 {
    34  		panic(fmt.Sprintf("mp == %#v, want %#v", mp, mypair{1, 2}))
    35  	}
    36  }
    37  

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