github.com/patricebensoussan/go/codec@v1.2.99/goversion_maprange_lt_go112.go (about)

     1  // Copyright (c) 2012-2020 Ugorji Nwoke. All rights reserved.
     2  // Use of this source code is governed by a MIT license found in the LICENSE file.
     3  
     4  //go:build go1.7 && !go1.12 && (safe || codec.safe || appengine)
     5  // +build go1.7
     6  // +build !go1.12
     7  // +build safe codec.safe appengine
     8  
     9  package codec
    10  
    11  import "reflect"
    12  
    13  type mapIter struct {
    14  	m      reflect.Value
    15  	keys   []reflect.Value
    16  	j      int
    17  	values bool
    18  }
    19  
    20  func (t *mapIter) Next() (r bool) {
    21  	t.j++
    22  	return t.j < len(t.keys)
    23  }
    24  
    25  func (t *mapIter) Key() reflect.Value {
    26  	return t.keys[t.j]
    27  }
    28  
    29  func (t *mapIter) Value() (r reflect.Value) {
    30  	if t.values {
    31  		return t.m.MapIndex(t.keys[t.j])
    32  	}
    33  	return
    34  }
    35  
    36  func (t *mapIter) Done() {}
    37  
    38  func mapRange(t *mapIter, m, k, v reflect.Value, values bool) {
    39  	*t = mapIter{
    40  		m:      m,
    41  		keys:   m.MapKeys(),
    42  		values: values,
    43  		j:      -1,
    44  	}
    45  }