issue73823.go

     1  // compile
     2  
     3  // Copyright 2025 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 p
     8  
     9  type Backend interface {
    10  	Hash(ignores func(bucketName, keyName []byte) bool) (uint32, error)
    11  }
    12  
    13  type backend struct {
    14  }
    15  
    16  func first() (key []byte, value []byte) {
    17  	return
    18  }
    19  
    20  func (b *backend) View(fn func() error) error {
    21  	return nil
    22  }
    23  
    24  func (b *backend) Hash(ignores func(bucketName, keyName []byte) bool) (uint32, error) {
    25  	err := b.View(func() error {
    26  		for next, _ := first(); next != nil; next, _ = first() {
    27  			_ = next
    28  		}
    29  		return nil
    30  	})
    31  	return 0, err
    32  }
    33  
    34  func defragdb() error {
    35  	for next, _ := first(); next != nil; next, _ = first() {
    36  		_ = f(next)
    37  		ForEach(func(k, v []byte) error {
    38  			_ = next
    39  			return nil
    40  		})
    41  	}
    42  
    43  	return nil
    44  }
    45  
    46  func ForEach(fn func(k, v []byte) error) error {
    47  	for k, v := first(); k != nil; k, v = first() {
    48  		if err := fn(k, v); err != nil {
    49  			return err
    50  		}
    51  	}
    52  	return nil
    53  }
    54  
    55  //go:noinline
    56  func f(any) string {
    57  	return ""
    58  }
    59
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