Add rac.Reader.CodecReaders doc comment
@@ -55,6 +55,8 @@ type CodecReader interface {
// Reader reads a RAC file.
//
// Do not modify its exported fields after calling any of its methods.
+//
+// Reader implements the io.ReadSeeker interface.
type Reader struct {
// ReadSeeker is where the RAC-encoded data is read from.
//
@@ -75,6 +77,10 @@ type Reader struct {
// Zero is an invalid value, as an empty file is not a valid RAC file.
CompressedSize int64
+ // CodecReaders are the compression codecs that this Reader can decompress.
+ //
+ // For example, use a raczlib.CodecReader from the sibilng "raczlib"
+ // package.
CodecReaders []CodecReader
// err is the first error encountered. It is sticky: once a non-nil error
