Function ExampleReadMapBytes_struct

msgp/iter_test.go:251–275

Example: map roundtrip with struct values in a byte slice using AppendMapSorted/ReadMapBytes. Uses testDec as the value type and sorts keys for deterministic output. Employs EncoderToBytes for values and DecoderFromBytes for values when reading.

()

// Uses testDec as the value type and sorts keys for deterministic output.
// Employs EncoderToBytes for values and DecoderFromBytes for values when reading.
func ExampleReadMapBytes_struct() {
	in := map[string]testDec{
		"a": {A: 1, B: "x"},
		"b": {A: 2, B: "y"},
	}
	var b []byte

	// Append map[string]testDec with sorted keys for stable example output.
	b = AppendMapSorted(b, in, AppendString, EncoderToBytes(testDec{}))

	// Read back using DecoderFromBytes for values.
	seq, finish := ReadMapBytes(b, ReadStringBytes, DecoderFromBytes(testDec{}))

	seq(func(k string, v testDec) bool {
		fmt.Printf("%s=%d,%s\n", k, v.A, v.B)
		return true
	})
	if _, err := finish(); err != nil {
		fmt.Println("err:", err)
	}

	// Output:
	// a=1,x
	// b=2,y
}

// Example: appending a map to a byte slice using AppendMap (non-sorted).
// Uses a single-entry map to keep output deterministic.