const go/token.COMMENT

6 uses

	go/token (current package)
		token.go#L24: 	COMMENT
		token.go#L139: 	COMMENT: "COMMENT",

	go/parser
		parser.go#L161: 	for p.tok == token.COMMENT && p.file.Line(p.pos) <= endline+n {
		parser.go#L195: 	if p.tok == token.COMMENT {
		parser.go#L212: 		for p.tok == token.COMMENT {

	go/scanner
		scanner.go#L941: 				tok = token.COMMENT