Parser_env.Eat
val token : env -> unit
val push_lex_mode : env -> Lex_mode.t -> unit
val pop_lex_mode : env -> unit
val double_pop_lex_mode : env -> unit
val trailing_comments : env -> Loc.t Flow_ast.Comment.t list
val comments_until_next_line : env -> Loc.t Flow_ast.Comment.t list
val program_comments : env -> Loc.t Flow_ast.Comment.t list