extract parse_pat_{tuple_}struct + recover_one_fewer_dotdot
extract parse_pat_{tuple_}struct + recover_one_fewer_dotdot

graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust