Remove deprecated io_buffer reader method
diff --git a/internal/cgen/base/io-public.h b/internal/cgen/base/io-public.h
index e18d015..28b3e6b 100644
--- a/internal/cgen/base/io-public.h
+++ b/internal/cgen/base/io-public.h
@@ -31,13 +31,12 @@
 // additional metadata.
 //
 // A value with all fields zero is a valid, empty buffer.
-typedef struct wuffs_base__io_buffer__struct {
+typedef struct {
   wuffs_base__slice_u8 data;
   wuffs_base__io_buffer_meta meta;
 
 #ifdef __cplusplus
   inline void compact();
-  inline wuffs_base__io_buffer__struct* reader();  // Deprecated.
   inline uint64_t reader_available() const;
   inline uint64_t reader_io_position() const;
   inline uint64_t writer_available() const;
@@ -157,11 +156,6 @@
   wuffs_base__io_buffer__compact(this);
 }
 
-inline wuffs_base__io_buffer*  //
-wuffs_base__io_buffer::reader() {
-  return this;
-}
-
 inline uint64_t  //
 wuffs_base__io_buffer::reader_available() const {
   return wuffs_base__io_buffer__reader_available(this);
diff --git a/internal/cgen/data.go b/internal/cgen/data.go
index cf38716..4dd57f2 100644
--- a/internal/cgen/data.go
+++ b/internal/cgen/data.go
@@ -174,11 +174,11 @@
 	""
 
 const baseIOPublicH = "" +
-	"// ---------------- I/O\n//\n// See (/doc/note/io-input-output.md).\n\n// wuffs_base__io_buffer_meta is the metadata for a wuffs_base__io_buffer's\n// data.\ntypedef struct {\n  size_t wi;     // Write index. Invariant: wi <= len.\n  size_t ri;     // Read  index. Invariant: ri <= wi.\n  uint64_t pos;  // Position of the buffer start relative to the stream start.\n  bool closed;   // No further writes are expected.\n} wuffs_base__io_buffer_meta;\n\n// wuffs_base__io_buffer is a 1-dimensional buffer (a pointer and length) plus\n// additional metadata.\n//\n// A value with all fields zero is a valid, empty buffer.\ntypedef struct wuffs_base__io_buffer__struct {\n  wuffs_base__slice_u8 data;\n  wuffs_base__io_buffer_meta meta;\n\n#ifdef __cplusplus\n  inline void compact();\n  inline wuffs_base__io_buffer__struct* reader();  // Deprecated.\n  inline uint64_t reader_available() const;\n  inline uint64_t reader_io_position() const;\n  inline uint64_t writer_available() const;\n  inline uint64_t writer_io_position() const;\n#endif  // __cplus" +
-	"plus\n\n} wuffs_base__io_buffer;\n\nstatic inline wuffs_base__io_buffer  //\nwuffs_base__make_io_buffer(wuffs_base__slice_u8 data,\n                           wuffs_base__io_buffer_meta meta) {\n  wuffs_base__io_buffer ret;\n  ret.data = data;\n  ret.meta = meta;\n  return ret;\n}\n\nstatic inline wuffs_base__io_buffer_meta  //\nwuffs_base__make_io_buffer_meta(size_t wi,\n                                size_t ri,\n                                uint64_t pos,\n                                bool closed) {\n  wuffs_base__io_buffer_meta ret;\n  ret.wi = wi;\n  ret.ri = ri;\n  ret.pos = pos;\n  ret.closed = closed;\n  return ret;\n}\n\nstatic inline wuffs_base__io_buffer  //\nwuffs_base__empty_io_buffer() {\n  wuffs_base__io_buffer ret;\n  ret.data.ptr = NULL;\n  ret.data.len = 0;\n  ret.meta.wi = 0;\n  ret.meta.ri = 0;\n  ret.meta.pos = 0;\n  ret.meta.closed = false;\n  return ret;\n}\n\nstatic inline wuffs_base__io_buffer_meta  //\nwuffs_base__empty_io_buffer_meta() {\n  wuffs_base__io_buffer_meta ret;\n  ret.wi = 0;\n  ret.ri = 0;\n  ret.pos = 0;\n  " +
-	"ret.closed = false;\n  return ret;\n}\n\n// Deprecated: use wuffs_base__empty_io_buffer.\nstatic inline wuffs_base__io_buffer  //\nwuffs_base__null_io_buffer() {\n  wuffs_base__io_buffer ret;\n  ret.data.ptr = NULL;\n  ret.data.len = 0;\n  ret.meta.wi = 0;\n  ret.meta.ri = 0;\n  ret.meta.pos = 0;\n  ret.meta.closed = false;\n  return ret;\n}\n\n// Deprecated: use wuffs_base__empty_io_buffer_meta.\nstatic inline wuffs_base__io_buffer_meta  //\nwuffs_base__null_io_buffer_meta() {\n  wuffs_base__io_buffer_meta ret;\n  ret.wi = 0;\n  ret.ri = 0;\n  ret.pos = 0;\n  ret.closed = false;\n  return ret;\n}\n\n// wuffs_base__io_buffer__compact moves any written but unread bytes to the\n// start of the buffer.\nstatic inline void  //\nwuffs_base__io_buffer__compact(wuffs_base__io_buffer* buf) {\n  if (!buf || (buf->meta.ri == 0)) {\n    return;\n  }\n  buf->meta.pos = wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri);\n  size_t n = buf->meta.wi - buf->meta.ri;\n  if (n != 0) {\n    memmove(buf->data.ptr, buf->data.ptr + buf->meta.ri, n);\n  }\n  buf->meta" +
-	".wi = n;\n  buf->meta.ri = 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__io_buffer__reader_available(const wuffs_base__io_buffer* buf) {\n  return buf ? buf->meta.wi - buf->meta.ri : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__io_buffer__reader_io_position(const wuffs_base__io_buffer* buf) {\n  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri) : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__io_buffer__writer_available(const wuffs_base__io_buffer* buf) {\n  return buf ? buf->data.len - buf->meta.wi : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__io_buffer__writer_io_position(const wuffs_base__io_buffer* buf) {\n  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.wi) : 0;\n}\n\n#ifdef __cplusplus\n\ninline void  //\nwuffs_base__io_buffer::compact() {\n  wuffs_base__io_buffer__compact(this);\n}\n\ninline wuffs_base__io_buffer*  //\nwuffs_base__io_buffer::reader() {\n  return this;\n}\n\ninline uint64_t  //\nwuffs_base__io_buffer::reader_available() const {\n  return wuffs_base__io_buffer__reader_available(" +
-	"this);\n}\n\ninline uint64_t  //\nwuffs_base__io_buffer::reader_io_position() const {\n  return wuffs_base__io_buffer__reader_io_position(this);\n}\n\ninline uint64_t  //\nwuffs_base__io_buffer::writer_available() const {\n  return wuffs_base__io_buffer__writer_available(this);\n}\n\ninline uint64_t  //\nwuffs_base__io_buffer::writer_io_position() const {\n  return wuffs_base__io_buffer__writer_io_position(this);\n}\n\n#endif  // __cplusplus\n" +
+	"// ---------------- I/O\n//\n// See (/doc/note/io-input-output.md).\n\n// wuffs_base__io_buffer_meta is the metadata for a wuffs_base__io_buffer's\n// data.\ntypedef struct {\n  size_t wi;     // Write index. Invariant: wi <= len.\n  size_t ri;     // Read  index. Invariant: ri <= wi.\n  uint64_t pos;  // Position of the buffer start relative to the stream start.\n  bool closed;   // No further writes are expected.\n} wuffs_base__io_buffer_meta;\n\n// wuffs_base__io_buffer is a 1-dimensional buffer (a pointer and length) plus\n// additional metadata.\n//\n// A value with all fields zero is a valid, empty buffer.\ntypedef struct {\n  wuffs_base__slice_u8 data;\n  wuffs_base__io_buffer_meta meta;\n\n#ifdef __cplusplus\n  inline void compact();\n  inline uint64_t reader_available() const;\n  inline uint64_t reader_io_position() const;\n  inline uint64_t writer_available() const;\n  inline uint64_t writer_io_position() const;\n#endif  // __cplusplus\n\n} wuffs_base__io_buffer;\n\nstatic inline wuffs_base__io_buffer  //\nwuffs_base__make_io_buff" +
+	"er(wuffs_base__slice_u8 data,\n                           wuffs_base__io_buffer_meta meta) {\n  wuffs_base__io_buffer ret;\n  ret.data = data;\n  ret.meta = meta;\n  return ret;\n}\n\nstatic inline wuffs_base__io_buffer_meta  //\nwuffs_base__make_io_buffer_meta(size_t wi,\n                                size_t ri,\n                                uint64_t pos,\n                                bool closed) {\n  wuffs_base__io_buffer_meta ret;\n  ret.wi = wi;\n  ret.ri = ri;\n  ret.pos = pos;\n  ret.closed = closed;\n  return ret;\n}\n\nstatic inline wuffs_base__io_buffer  //\nwuffs_base__empty_io_buffer() {\n  wuffs_base__io_buffer ret;\n  ret.data.ptr = NULL;\n  ret.data.len = 0;\n  ret.meta.wi = 0;\n  ret.meta.ri = 0;\n  ret.meta.pos = 0;\n  ret.meta.closed = false;\n  return ret;\n}\n\nstatic inline wuffs_base__io_buffer_meta  //\nwuffs_base__empty_io_buffer_meta() {\n  wuffs_base__io_buffer_meta ret;\n  ret.wi = 0;\n  ret.ri = 0;\n  ret.pos = 0;\n  ret.closed = false;\n  return ret;\n}\n\n// Deprecated: use wuffs_base__empty_io_buffer.\nstatic inli" +
+	"ne wuffs_base__io_buffer  //\nwuffs_base__null_io_buffer() {\n  wuffs_base__io_buffer ret;\n  ret.data.ptr = NULL;\n  ret.data.len = 0;\n  ret.meta.wi = 0;\n  ret.meta.ri = 0;\n  ret.meta.pos = 0;\n  ret.meta.closed = false;\n  return ret;\n}\n\n// Deprecated: use wuffs_base__empty_io_buffer_meta.\nstatic inline wuffs_base__io_buffer_meta  //\nwuffs_base__null_io_buffer_meta() {\n  wuffs_base__io_buffer_meta ret;\n  ret.wi = 0;\n  ret.ri = 0;\n  ret.pos = 0;\n  ret.closed = false;\n  return ret;\n}\n\n// wuffs_base__io_buffer__compact moves any written but unread bytes to the\n// start of the buffer.\nstatic inline void  //\nwuffs_base__io_buffer__compact(wuffs_base__io_buffer* buf) {\n  if (!buf || (buf->meta.ri == 0)) {\n    return;\n  }\n  buf->meta.pos = wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri);\n  size_t n = buf->meta.wi - buf->meta.ri;\n  if (n != 0) {\n    memmove(buf->data.ptr, buf->data.ptr + buf->meta.ri, n);\n  }\n  buf->meta.wi = n;\n  buf->meta.ri = 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__io_buffer__reader_availab" +
+	"le(const wuffs_base__io_buffer* buf) {\n  return buf ? buf->meta.wi - buf->meta.ri : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__io_buffer__reader_io_position(const wuffs_base__io_buffer* buf) {\n  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.ri) : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__io_buffer__writer_available(const wuffs_base__io_buffer* buf) {\n  return buf ? buf->data.len - buf->meta.wi : 0;\n}\n\nstatic inline uint64_t  //\nwuffs_base__io_buffer__writer_io_position(const wuffs_base__io_buffer* buf) {\n  return buf ? wuffs_base__u64__sat_add(buf->meta.pos, buf->meta.wi) : 0;\n}\n\n#ifdef __cplusplus\n\ninline void  //\nwuffs_base__io_buffer::compact() {\n  wuffs_base__io_buffer__compact(this);\n}\n\ninline uint64_t  //\nwuffs_base__io_buffer::reader_available() const {\n  return wuffs_base__io_buffer__reader_available(this);\n}\n\ninline uint64_t  //\nwuffs_base__io_buffer::reader_io_position() const {\n  return wuffs_base__io_buffer__reader_io_position(this);\n}\n\ninline uint64_t  //\nwuffs_base__io_buff" +
+	"er::writer_available() const {\n  return wuffs_base__io_buffer__writer_available(this);\n}\n\ninline uint64_t  //\nwuffs_base__io_buffer::writer_io_position() const {\n  return wuffs_base__io_buffer__writer_io_position(this);\n}\n\n#endif  // __cplusplus\n" +
 	""
 
 const baseRangePrivateH = "" +
diff --git a/release/c/wuffs-unsupported-snapshot.c b/release/c/wuffs-unsupported-snapshot.c
index 15a60d6..761ff3f 100644
--- a/release/c/wuffs-unsupported-snapshot.c
+++ b/release/c/wuffs-unsupported-snapshot.c
@@ -1309,13 +1309,12 @@
 // additional metadata.
 //
 // A value with all fields zero is a valid, empty buffer.
-typedef struct wuffs_base__io_buffer__struct {
+typedef struct {
   wuffs_base__slice_u8 data;
   wuffs_base__io_buffer_meta meta;
 
 #ifdef __cplusplus
   inline void compact();
-  inline wuffs_base__io_buffer__struct* reader();  // Deprecated.
   inline uint64_t reader_available() const;
   inline uint64_t reader_io_position() const;
   inline uint64_t writer_available() const;
@@ -1435,11 +1434,6 @@
   wuffs_base__io_buffer__compact(this);
 }
 
-inline wuffs_base__io_buffer*  //
-wuffs_base__io_buffer::reader() {
-  return this;
-}
-
 inline uint64_t  //
 wuffs_base__io_buffer::reader_available() const {
   return wuffs_base__io_buffer__reader_available(this);