Improve iota constants and go:generate comments

Author: nhooyr

datatype.go

@@ -1,8 +1,8 @@
 package websocket
 
 // DataType represents the Opcode of a WebSocket data frame.
-//go:generate go run golang.org/x/tools/cmd/stringer -type=DataType
 type DataType int
+//go:generate go run golang.org/x/tools/cmd/stringer -type=DataType
 
 // DataType constants.
 const (

opcode.go

@@ -1,16 +1,21 @@
 package websocket
 
 // opcode represents a WebSocket Opcode.
-//go:generate go run golang.org/x/tools/cmd/stringer -type=opcode
 type opcode int
+//go:generate go run golang.org/x/tools/cmd/stringer -type=opcode
 
 // opcode constants.
 const (
 	opContinuation opcode = iota
 	opText
 	opBinary
 	// 3 - 7 are reserved for further non-control frames.
-	opClose opcode = 8 + iota - 3
+	_
+	_
+	_
+	_
+	_
+	opClose
 	opPing
 	opPong
 	// 11-16 are reserved for further control frames.

statuscode.go

@@ -11,8 +11,8 @@ import (
 )
 
 // StatusCode represents a WebSocket status code.
-//go:generate go run golang.org/x/tools/cmd/stringer -type=StatusCode
 type StatusCode int
+//go:generate go run golang.org/x/tools/cmd/stringer -type=StatusCode
 
 // These codes were retrieved from:
 // https://www.iana.org/assignments/websocket/websocket.xhtml#close-code-number
@@ -21,8 +21,8 @@ const (
 	StatusGoingAway
 	StatusProtocolError
 	StatusUnsupportedData
-	// 1004 is reserved.
-	StatusNoStatusRcvd StatusCode = 1005 + iota - 4
+	_ // 1004 is reserved.
+	StatusNoStatusRcvd
 	StatusAbnormalClosure
 	StatusInvalidFramePayloadData
 	StatusPolicyViolation