Object.Expressionval assignment : Parser_env.env -> (Loc.t, Loc.t) Flow_ast.Expression.tval assignment_cover : Parser_env.env -> Parser_common.pattern_coverval conditional : Parser_env.env -> (Loc.t, Loc.t) Flow_ast.Expression.tval is_assignable_lhs : (Loc.t, Loc.t) Flow_ast.Expression.t -> boolval left_hand_side : Parser_env.env -> (Loc.t, Loc.t) Flow_ast.Expression.tval number : Parser_env.env -> Token.number_type -> string -> floatval sequence : 
  Parser_env.env ->
  start_loc:Loc.t ->
  (Loc.t, Loc.t) Flow_ast.Expression.t list ->
  (Loc.t, Loc.t) Flow_ast.Expression.t