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fix CPL of <extended-generic-with-setter> and <extended-accessor>

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* libguile/goops.c (fix_cpl): Fix bug in placement of debug assertion.
  (create_standard_classes): Put <extended-generic> before
  <generic-with-setter> in <extended-generic-with-setter>'s direct
  supers, so that the slot allocation is a superset of
  <generic-with-setter>, which results in the `setter' being allocated
  in the same place.

  Likewise fix <extended-accessor> to place <extended-generic> before
  <generic-with-setter>, not just <generic>.
This commit is contained in:
Andy Wingo 2011-07-07 12:45:30 +02:00
parent 319dd08936
commit ae88d9bcf6
1 changed files with 11 additions and 4 deletions
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15
libguile/goops.c
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@ -2280,15 +2280,21 @@ SCM_DEFINE (scm_sys_method_more_specific_p, "%method-more-specific?", 3, 0, 0,
*
******************************************************************************/
/* Munge the CPL of C in place such that BEFORE appears before AFTER,
assuming that currently the reverse is true. Recalculate slots and
associated getters-n-setters. */
static void
fix_cpl (SCM c, SCM before, SCM after)
{
SCM cpl = SCM_SLOT (c, scm_si_cpl);
SCM ls = scm_c_memq (after, cpl);
SCM tail = scm_delq1_x (before, SCM_CDR (ls));
SCM tail;
if (scm_is_false (ls))
/* if this condition occurs, fix_cpl should not be applied this way */
abort ();
tail = scm_delq1_x (before, SCM_CDR (ls));
SCM_SETCAR (ls, before);
SCM_SETCDR (ls, scm_cons (after, tail));
{
@ -2414,8 +2420,8 @@ create_standard_classes (void)
make_stdcls (&scm_class_extended_generic_with_setter,
"<extended-generic-with-setter>",
scm_class_applicable_struct_class,
scm_list_2 (scm_class_generic_with_setter,
scm_class_extended_generic),
scm_list_2 (scm_class_extended_generic,
scm_class_generic_with_setter),
SCM_EOL);
SCM_SET_CLASS_FLAGS (scm_class_extended_generic_with_setter,
SCM_CLASSF_PURE_GENERIC);
@ -2424,8 +2430,9 @@ create_standard_classes (void)
scm_list_2 (scm_class_accessor,
scm_class_extended_generic_with_setter),
SCM_EOL);
/* <extended-generic> is misplaced. */
fix_cpl (scm_class_extended_accessor,
scm_class_extended_generic, scm_class_generic);
scm_class_extended_generic, scm_class_generic_with_setter);
SCM_SET_CLASS_FLAGS (scm_class_extended_accessor, SCM_CLASSF_PURE_GENERIC);
/* Primitive types classes */