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39 lines
739 B
Go
39 lines
739 B
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build !go1.12
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// +build !go1.12
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package impl
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import "reflect"
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type mapIter struct {
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v reflect.Value
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keys []reflect.Value
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}
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// mapRange provides a less-efficient equivalent to
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// the Go 1.12 reflect.Value.MapRange method.
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func mapRange(v reflect.Value) *mapIter {
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return &mapIter{v: v}
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}
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func (i *mapIter) Next() bool {
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if i.keys == nil {
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i.keys = i.v.MapKeys()
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} else {
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i.keys = i.keys[1:]
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}
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return len(i.keys) > 0
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}
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func (i *mapIter) Key() reflect.Value {
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return i.keys[0]
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}
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func (i *mapIter) Value() reflect.Value {
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return i.v.MapIndex(i.keys[0])
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}
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