libgo: update to Go1.10beta1

    
    Update the Go library to the 1.10beta1 release.
    
    Requires a few changes to the compiler for modifications to the map
    runtime code, and to handle some nowritebarrier cases in the runtime.
    
    Reviewed-on: https://go-review.googlesource.com/86455

gotools/:
	* Makefile.am (go_cmd_vet_files): New variable.
	(go_cmd_buildid_files, go_cmd_test2json_files): New variables.
	(s-zdefaultcc): Change from constants to functions.
	(noinst_PROGRAMS): Add vet, buildid, and test2json.
	(cgo$(EXEEXT)): Link against $(LIBGOTOOL).
	(vet$(EXEEXT)): New target.
	(buildid$(EXEEXT)): New target.
	(test2json$(EXEEXT)): New target.
	(install-exec-local): Install all $(noinst_PROGRAMS).
	(uninstall-local): Uninstasll all $(noinst_PROGRAMS).
	(check-go-tool): Depend on $(noinst_PROGRAMS).  Copy down
	objabi.go.
	(check-runtime): Depend on $(noinst_PROGRAMS).
	(check-cgo-test, check-carchive-test): Likewise.
	(check-vet): New target.
	(check): Depend on check-vet.  Look at cmd_vet-testlog.
	(.PHONY): Add check-vet.
	* Makefile.in: Rebuild.

From-SVN: r256365

1 files changed, 6 insertions, 0 deletions

diff --git a/libgo/go/bytes/reader.go b/libgo/go/bytes/reader.go
index 28cfc7a..08464c2 100644
--- a/libgo/go/bytes/reader.go
+++ b/libgo/go/bytes/reader.go
@@ -35,6 +35,7 @@ func (r *Reader) Len() int {
 // to any other method.
 func (r *Reader) Size() int64 { return int64(len(r.s)) }
 
+// Read implements the io.Reader interface.
 func (r *Reader) Read(b []byte) (n int, err error) {
 	if r.i >= int64(len(r.s)) {
 		return 0, io.EOF
@@ -45,6 +46,7 @@ func (r *Reader) Read(b []byte) (n int, err error) {
 	return
 }
 
+// ReadAt implements the io.ReaderAt interface.
 func (r *Reader) ReadAt(b []byte, off int64) (n int, err error) {
 	// cannot modify state - see io.ReaderAt
 	if off < 0 {
@@ -60,6 +62,7 @@ func (r *Reader) ReadAt(b []byte, off int64) (n int, err error) {
 	return
 }
 
+// ReadByte implements the io.ByteReader interface.
 func (r *Reader) ReadByte() (byte, error) {
 	r.prevRune = -1
 	if r.i >= int64(len(r.s)) {
@@ -70,6 +73,7 @@ func (r *Reader) ReadByte() (byte, error) {
 	return b, nil
 }
 
+// UnreadByte complements ReadByte in implementing the io.ByteScanner interface.
 func (r *Reader) UnreadByte() error {
 	r.prevRune = -1
 	if r.i <= 0 {
@@ -79,6 +83,7 @@ func (r *Reader) UnreadByte() error {
 	return nil
 }
 
+// ReadRune implements the io.RuneReader interface.
 func (r *Reader) ReadRune() (ch rune, size int, err error) {
 	if r.i >= int64(len(r.s)) {
 		r.prevRune = -1
@@ -94,6 +99,7 @@ func (r *Reader) ReadRune() (ch rune, size int, err error) {
 	return
 }
 
+// UnreadRune complements ReadRune in implementing the io.RuneScanner interface.
 func (r *Reader) UnreadRune() error {
 	if r.prevRune < 0 {
 		return errors.New("bytes.Reader.UnreadRune: previous operation was not ReadRune")