const go/token.FALLTHROUGH

10 uses

	go/token (current package)
		token.go#L107: 	FALLTHROUGH
		token.go#L213: 	FALLTHROUGH: "fallthrough",

	go/parser
		parser.go#L373: 	token.FALLTHROUGH: true,
		parser.go#L2039: 	if tok != token.FALLTHROUGH && p.tok == token.IDENT {
		parser.go#L2454: 	case token.BREAK, token.CONTINUE, token.GOTO, token.FALLTHROUGH:
		resolver.go#L318: 		if n.Tok != token.FALLTHROUGH && n.Label != nil {

	go/printer
		printer.go#L961: 			case token.BREAK, token.CONTINUE, token.FALLTHROUGH, token.RETURN,

	go/scanner
		scanner.go#L845: 			case token.IDENT, token.BREAK, token.CONTINUE, token.FALLTHROUGH, token.RETURN:

	go/types
		return.go#L40: 		if s.Tok == token.GOTO || s.Tok == token.FALLTHROUGH {
		stmt.go#L542: 		case token.FALLTHROUGH:

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