28                     Def::Nonterminal(nt.args.len()),  in resolve_in_place()
105     Nonterminal(usize), // argument is the number of macro arguments  enumerator
119             Def::Nonterminal(0) => "nonterminal",  in description()
120             Def::Nonterminal(_) => "macro",  in description()
134                 GrammarItem::Nonterminal(ref mut data) => {  in validate()
212             SymbolKind::Nonterminal(ref id) => {  in validate_symbol()
217                     Def::Nonterminal(0) | Def::MacroArg => {  in validate_symbol()
220                     Def::Terminal | Def::Nonterminal(_) => {  in validate_symbol()
234                     Def::Nonterminal(0) | Def::Terminal | Def::MacroArg => return_err!(  in validate_symbol()
240                     Def::Nonterminal(arity) => {  in validate_symbol()
277             Def::MacroArg | Def::Nonterminal(0) => SymbolKind::Nonterminal(NonterminalString(id)),  in rewrite_ambiguous_id()
279             Def::Nonterminal(_) => return_err!(symbol.span, "`{}` is a macro", id),  in rewrite_ambiguous_id()