+ is_sexp new->compile_string($string), $expected, "compile_string $string";
+}
+
+is_sexp new->process_quoted(to_sexp '5'), '(SYMBOL 3)', 'process_quoted 5';
+is_sexp new->process_quoted(to_sexp '()'), '(LIST 0)', 'process_quoted ()';
+is_sexp new->process_quoted(to_sexp '(5 foo)'), '(LIST (LIST (LIST 0) (SYMBOL 3)) (SYMBOL 4))', 'process_quoted (5 foo)';
+is_sexp new->process_quoted(to_sexp '(((5)))'), '(LIST (LIST 0) (LIST (LIST 0) (LIST (LIST 0) (SYMBOL 3))))', 'process_quoted (((5)))';
+
+is_toplevel '()', '(LIST 0)';
+is_toplevel 'NIL', '(LIST 0)';
+is_toplevel 'T', '(SYMBOL 2)';
+is_toplevel '(quote 5)', '(SYMBOL 3)';
+is_toplevel '(reverse-list \'a \'a \'b)', '(CALL (MORE (MORE (REVERSE-LIST 0) (SYMBOL 4)) (SYMBOL 3)) (SYMBOL 3))';
+is_toplevel '(if t \'(2 3) \'x)', '(IF (LIST (SYMBOL 5) (LIST (LIST (LIST 0) (SYMBOL 3)) (SYMBOL 4))) (SYMBOL 2))';
+is_toplevel '(car \'(1 2))', '(CALL (CAR 0) (LIST (LIST (LIST 0) (SYMBOL 3)) (SYMBOL 4)))';
+is_toplevel '(lambda id (x) x)', '(PROC (VAR -2))';
+is_toplevel '((lambda id (x) x) 5)', '(CALL (MORE (FUNCALL 0) (PROC (VAR -2))) (SYMBOL 3))';
+is_toplevel '(lambda append (x y) (if (atom x) y (cons (car x) (append (cdr x) y))))', '(PROC (IF (LIST (CALL (MORE (CONS 0) (CALL (MORE (MORE (FUNCALL 0) (VAR -1)) (VAR -2)) (CALL (CDR 0) (VAR -3)))) (CALL (CAR 0) (VAR -3))) (VAR -2)) (CALL (ATOM 0) (VAR -3))))';
+
+sub pp_roundtrip {
+ my ($string) = @_;
+ my $pp = uc dump_sexp(to_sexp $string);
+ is $pp, uc($string), "dump_sexp roundtrip $string";
+}
+
+pp_roundtrip '()';
+pp_roundtrip 't';
+pp_roundtrip '(lambda append (x y) (if (atom x) y (cons (car x) (append (cdr x) y))))';
+
+sub expect_error_like (&$) {
+ my ($block, $error_re) = @_;
+ my $name = "test error like /$error_re/";
+ my $result = eval { $block->(); 1 };
+ if ($result) {
+ note 'Block did not throw an exception, failing test';
+ fail $name;
+ } else {
+ like $@, qr/$error_re/, $name;
+ }