2254                 let lookahead = input.lookahead1();  in parse()  localVariable
2255                 if lookahead.peek(Token![if]) {  in parse()
2258                 } else if lookahead.peek(token::Brace) {  in parse()
2269                     return Err(lookahead.error());  in parse()
2925             let lookahead = input.lookahead1();  in parse()  localVariable
2926             let dot_dot = lookahead.peek(Token![..]);  in parse()
2927             let dot_dot_eq = dot_dot && lookahead.peek(Token![..=]);  in parse()
2934                 Err(lookahead.error())  in parse()
2942             let lookahead = input.lookahead1();  in parse_obsolete()  localVariable
2943             let dot_dot = lookahead.peek(Token![..]);  in parse_obsolete()
2944             let dot_dot_eq = dot_dot && lookahead.peek(Token![..=]);  in parse_obsolete()
2954                 Err(lookahead.error())  in parse_obsolete()
3088             let lookahead = input.lookahead1();  in parse()  localVariable
3089             if lookahead.peek(Token![const]) {  in parse()
3091             } else if lookahead.peek(Token![mut]) {  in parse()
3094                 Err(lookahead.error())  in parse()