Parser_env.Eatval token : env -> unitval push_lex_mode : env -> Lex_mode.t -> unitval pop_lex_mode : env -> unitval double_pop_lex_mode : env -> unitval trailing_comments : env -> Loc.t Flow_ast.Comment.t listval comments_until_next_line : env -> Loc.t Flow_ast.Comment.t listval program_comments : env -> Loc.t Flow_ast.Comment.t list