Source file src/cmd/compile/internal/test/testdata/mysort/mysort.go

     1  // Copyright 2021 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Generic sort function, tested with two different pointer types.
     6  
     7  package mysort
     8  
     9  import (
    10  	"fmt"
    11  )
    12  
    13  type LessConstraint[T any] interface {
    14  	Less(T) bool
    15  }
    16  
    17  //go:noinline
    18  func Sort[T LessConstraint[T]](x []T) {
    19  	n := len(x)
    20  	for i := 1; i < n; i++ {
    21  		for j := i; j > 0 && x[j].Less(x[j-1]); j-- {
    22  			x[j], x[j-1] = x[j-1], x[j]
    23  		}
    24  	}
    25  }
    26  
    27  type MyInt struct {
    28  	Value int
    29  }
    30  
    31  func (a *MyInt) Less(b *MyInt) bool {
    32  	return a.Value < b.Value
    33  }
    34  
    35  //go:noinline
    36  func F() {
    37  	sl1 := []*MyInt{&MyInt{4}, &MyInt{3}, &MyInt{8}, &MyInt{7}}
    38  	Sort(sl1)
    39  	fmt.Printf("%v %v %v %v\n", sl1[0], sl1[1], sl1[2], sl1[3])
    40  }
    41  

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