rlp: fix some golint warnings (#16659)

rlp/decode.go

@@ -29,6 +29,23 @@ import (
 )
 
 var (
+	// EOL is returned when the end of the current list
+	// has been reached during streaming.
+	EOL = errors.New("rlp: end of list")
+
+	// Actual Errors
+	ErrExpectedString   = errors.New("rlp: expected String or Byte")
+	ErrExpectedList     = errors.New("rlp: expected List")
+	ErrCanonInt         = errors.New("rlp: non-canonical integer format")
+	ErrCanonSize        = errors.New("rlp: non-canonical size information")
+	ErrElemTooLarge     = errors.New("rlp: element is larger than containing list")
+	ErrValueTooLarge    = errors.New("rlp: value size exceeds available input length")
+	ErrMoreThanOneValue = errors.New("rlp: input contains more than one value")
+
+	// internal errors
+	errNotInList     = errors.New("rlp: call of ListEnd outside of any list")
+	errNotAtEOL      = errors.New("rlp: call of ListEnd not positioned at EOL")
+	errUintOverflow  = errors.New("rlp: uint overflow")
 	errNoPointer     = errors.New("rlp: interface given to Decode must be a pointer")
 	errDecodeIntoNil = errors.New("rlp: pointer given to Decode must not be nil")
 )
@@ -274,9 +291,8 @@ func makeListDecoder(typ reflect.Type, tag tags) (decoder, error) {
 	if etype.Kind() == reflect.Uint8 && !reflect.PtrTo(etype).Implements(decoderInterface) {
 		if typ.Kind() == reflect.Array {
 			return decodeByteArray, nil
-		} else {
-			return decodeByteSlice, nil
 		}
+		return decodeByteSlice, nil
 	}
 	etypeinfo, err := cachedTypeInfo1(etype, tags{})
 	if err != nil {
@@ -555,29 +571,6 @@ func (k Kind) String() string {
 	}
 }
 
-var (
-	// EOL is returned when the end of the current list
-	// has been reached during streaming.
-	EOL = errors.New("rlp: end of list")
-
-	// Actual Errors
-	ErrExpectedString = errors.New("rlp: expected String or Byte")
-	ErrExpectedList   = errors.New("rlp: expected List")
-	ErrCanonInt       = errors.New("rlp: non-canonical integer format")
-	ErrCanonSize      = errors.New("rlp: non-canonical size information")
-	ErrElemTooLarge   = errors.New("rlp: element is larger than containing list")
-	ErrValueTooLarge  = errors.New("rlp: value size exceeds available input length")
-
-	// This error is reported by DecodeBytes if the slice contains
-	// additional data after the first RLP value.
-	ErrMoreThanOneValue = errors.New("rlp: input contains more than one value")
-
-	// internal errors
-	errNotInList    = errors.New("rlp: call of ListEnd outside of any list")
-	errNotAtEOL     = errors.New("rlp: call of ListEnd not positioned at EOL")
-	errUintOverflow = errors.New("rlp: uint overflow")
-)
-
 // ByteReader must be implemented by any input reader for a Stream. It
 // is implemented by e.g. bufio.Reader and bytes.Reader.
 type ByteReader interface {

rlp/encode.go

@@ -92,7 +92,7 @@ func Encode(w io.Writer, val interface{}) error {
 	return eb.toWriter(w)
 }
 
-// EncodeBytes returns the RLP encoding of val.
+// EncodeToBytes returns the RLP encoding of val.
 // Please see the documentation of Encode for the encoding rules.
 func EncodeToBytes(val interface{}) ([]byte, error) {
 	eb := encbufPool.Get().(*encbuf)
@@ -104,7 +104,7 @@ func EncodeToBytes(val interface{}) ([]byte, error) {
 	return eb.toBytes(), nil
 }
 
-// EncodeReader returns a reader from which the RLP encoding of val
+// EncodeToReader returns a reader from which the RLP encoding of val
 // can be read. The returned size is the total size of the encoded
 // data.
 //
@@ -151,11 +151,10 @@ func puthead(buf []byte, smalltag, largetag byte, size uint64) int {
 	if size < 56 {
 		buf[0] = smalltag + byte(size)
 		return 1
-	} else {
-		sizesize := putint(buf[1:], size)
-		buf[0] = largetag + byte(sizesize)
-		return sizesize + 1
 	}
+	sizesize := putint(buf[1:], size)
+	buf[0] = largetag + byte(sizesize)
+	return sizesize + 1
 }
 
 // encbufs are pooled.
@@ -218,7 +217,7 @@ func (w *encbuf) list() *listhead {
 func (w *encbuf) listEnd(lh *listhead) {
 	lh.size = w.size() - lh.offset - lh.size
 	if lh.size < 56 {
-		w.lhsize += 1 // length encoded into kind tag
+		w.lhsize++ // length encoded into kind tag
 	} else {
 		w.lhsize += 1 + intsize(uint64(lh.size))
 	}
@@ -322,10 +321,9 @@ func (r *encReader) next() []byte {
 			p := r.buf.str[r.strpos:head.offset]
 			r.strpos += sizebefore
 			return p
-		} else {
-			r.lhpos++
-			return head.encode(r.buf.sizebuf)
 		}
+		r.lhpos++
+		return head.encode(r.buf.sizebuf)
 
 	case r.strpos < len(r.buf.str):
 		// String data at the end, after all list headers.
@@ -576,9 +574,8 @@ func makePtrWriter(typ reflect.Type) (writer, error) {
 	writer := func(val reflect.Value, w *encbuf) error {
 		if val.IsNil() {
 			return nilfunc(w)
-		} else {
-			return etypeinfo.writer(val.Elem(), w)
 		}
+		return etypeinfo.writer(val.Elem(), w)
 	}
 	return writer, err
 }