diff options
Diffstat (limited to 'class.c')
| -rw-r--r-- | class.c | 60 |
1 files changed, 60 insertions, 0 deletions
@@ -260,6 +260,63 @@ rb_class_boot(VALUE super) } void +rb_class_remove_superclasses(VALUE klass) +{ + if (!RB_TYPE_P(klass, T_CLASS)) + return; + + if (RCLASS_SUPERCLASSES(klass)) + xfree(RCLASS_SUPERCLASSES(klass)); + + RCLASS_SUPERCLASSES(klass) = NULL; + RCLASS_SUPERCLASS_DEPTH(klass) = 0; +} + +void +rb_class_update_superclasses(VALUE klass) +{ + VALUE super = RCLASS_SUPER(klass); + + if (!RB_TYPE_P(klass, T_CLASS)) return; + if (super == Qundef) return; + + // If the superclass array is already built + if (RCLASS_SUPERCLASSES(klass)) + return; + + // find the proper superclass + while (super != Qfalse && !RB_TYPE_P(super, T_CLASS)) { + super = RCLASS_SUPER(super); + } + + // For BasicObject and uninitialized classes, depth=0 and ary=NULL + if (super == Qfalse) + return; + + // Sometimes superclasses are set before the full ancestry tree is built + // This happens during metaclass construction + if (super != rb_cBasicObject && !RCLASS_SUPERCLASS_DEPTH(super)) { + rb_class_update_superclasses(super); + + // If it is still unset we need to try later + if (!RCLASS_SUPERCLASS_DEPTH(super)) + return; + } + + size_t parent_num = RCLASS_SUPERCLASS_DEPTH(super); + size_t num = parent_num + 1; + + VALUE *superclasses = xmalloc(sizeof(VALUE) * num); + superclasses[parent_num] = super; + if (parent_num > 0) { + memcpy(superclasses, RCLASS_SUPERCLASSES(super), sizeof(VALUE) * parent_num); + } + + RCLASS_SUPERCLASSES(klass) = superclasses; + RCLASS_SUPERCLASS_DEPTH(klass) = num; +} + +void rb_check_inheritable(VALUE super) { if (!RB_TYPE_P(super, T_CLASS)) { @@ -667,6 +724,9 @@ make_metaclass(VALUE klass) while (RB_TYPE_P(super, T_ICLASS)) super = RCLASS_SUPER(super); RCLASS_SET_SUPER(metaclass, super ? ENSURE_EIGENCLASS(super) : rb_cClass); + // Full class ancestry may not have been filled until we reach here. + rb_class_update_superclasses(METACLASS_OF(metaclass)); + return metaclass; } |