34 lines
930 B
Go
34 lines
930 B
Go
package rlp
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
)
|
|
|
|
type structWithTail struct {
|
|
A, B uint
|
|
C []uint `rlp:"tail"`
|
|
}
|
|
|
|
func ExampleDecode_structTagTail() {
|
|
// In this example, the "tail" struct tag is used to decode lists of
|
|
// differing length into a struct.
|
|
var val structWithTail
|
|
|
|
err := Decode(bytes.NewReader([]byte{0xC4, 0x01, 0x02, 0x03, 0x04}), &val)
|
|
fmt.Printf("with 4 elements: err=%v val=%v\n", err, val)
|
|
|
|
err = Decode(bytes.NewReader([]byte{0xC6, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06}), &val)
|
|
fmt.Printf("with 6 elements: err=%v val=%v\n", err, val)
|
|
|
|
// Note that at least two list elements must be present to
|
|
// fill fields A and B:
|
|
err = Decode(bytes.NewReader([]byte{0xC1, 0x01}), &val)
|
|
fmt.Printf("with 1 element: err=%q\n", err)
|
|
|
|
// Output:
|
|
// with 4 elements: err=<nil> val={1 2 [3 4]}
|
|
// with 6 elements: err=<nil> val={1 2 [3 4 5 6]}
|
|
// with 1 element: err="rlp: too few elements for rlp.structWithTail"
|
|
}
|