Function ReadMap

msgp/iter.go:74–106

ReadMap returns an iterator that can be used to iterate over the elements of a map in the MessagePack data while being read by the provided Reader. The type parameters K and V specify the types of the keys and values in the map. The returned iterator implements the iter.Seq2[K, V] interface, allowin

(m *Reader, readKey func() (K, error), readVal func() (V, error))

// The returned function can be used to read any error that
// occurred during iteration when iteration is done.
func ReadMap[K, V any](m *Reader, readKey func() (K, error), readVal func() (V, error)) (iter.Seq2[K, V], func() error) {
	var err error
	return func(yield func(K, V) bool) {
		var sz uint32
		if m.IsNil() {
			err = m.ReadNil()
			return
		}
		sz, err = m.ReadMapHeader()
		if err != nil {
			err = fmt.Errorf("cannot read map header: %w", err)
			return
		}

		for range sz {
			var k K
			k, err = readKey()
			if err != nil {
				err = fmt.Errorf("cannot read key: %w", err)
				return
			}
			var v V
			v, err = readVal()
			if err != nil {
				err = fmt.Errorf("cannot read value: %w", err)
				return
			}
			if !yield(k, v) {
				return
			}
		}
	}, func() error { return err }
}

// WriteMap writes a map to the provided Writer.
// The writeKey and writeVal parameters specify the functions