Function WriteMap

msgp/iter.go:111–136

WriteMap writes a map to the provided Writer. The writeKey and writeVal parameters specify the functions to use to write each key and value of the map.

(w *Writer, m map[K]V, writeKey func(K) error, writeVal func(V) error)

// The writeKey and writeVal parameters specify the functions
// to use to write each key and value of the map.
func WriteMap[K comparable, V any](w *Writer, m map[K]V, writeKey func(K) error, writeVal func(V) error) error {
	if m == nil {
		return w.WriteNil()
	}
	if uint64(len(m)) > math.MaxUint32 {
		return fmt.Errorf("map too large to encode: %d elements", len(m))
	}

	// Write map header
	err := w.WriteMapHeader(uint32(len(m)))
	if err != nil {
		return err
	}
	// Write elements
	for k, v := range m {
		err = writeKey(k)
		if err != nil {
			return err
		}
		err = writeVal(v)
		if err != nil {
			return err
		}
	}
	return nil
}

// WriteMapSorted writes a map to the provided Writer.
// The keys of the map are sorted before writing.