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variable table if it existes. * class.c (rb_make_metaclass): metaclass of a metaclass is a metaclass itself. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2784 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
859 lines
17 KiB
C
859 lines
17 KiB
C
/**********************************************************************
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class.c -
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$Author$
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$Date$
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created at: Tue Aug 10 15:05:44 JST 1993
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Copyright (C) 1993-2002 Yukihiro Matsumoto
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**********************************************************************/
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#include "ruby.h"
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#include "rubysig.h"
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#include "node.h"
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#include "st.h"
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#include <ctype.h>
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extern st_table *rb_class_tbl;
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VALUE
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rb_class_boot(super)
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VALUE super;
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{
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NEWOBJ(klass, struct RClass);
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OBJSETUP(klass, rb_cClass, T_CLASS);
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klass->super = super;
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klass->iv_tbl = 0;
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klass->m_tbl = 0; /* safe GC */
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klass->m_tbl = st_init_numtable();
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OBJ_INFECT(klass, super);
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return (VALUE)klass;
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}
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VALUE
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rb_class_new(super)
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VALUE super;
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{
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Check_Type(super, T_CLASS);
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if (super == rb_cClass) {
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rb_raise(rb_eTypeError, "can't make subclass of Class");
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}
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if (FL_TEST(super, FL_SINGLETON)) {
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rb_raise(rb_eTypeError, "can't make subclass of virtual class");
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}
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return rb_class_boot(super);
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}
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static int
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clone_method(mid, body, tbl)
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ID mid;
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NODE *body;
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st_table *tbl;
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{
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st_insert(tbl, mid, NEW_METHOD(body->nd_body, body->nd_noex));
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return ST_CONTINUE;
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}
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VALUE
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rb_mod_clone(module)
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VALUE module;
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{
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NEWOBJ(clone, struct RClass);
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CLONESETUP(clone, module);
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RCLASS(clone)->super = RCLASS(module)->super;
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if (RCLASS(module)->iv_tbl) {
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ID id;
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RCLASS(clone)->iv_tbl = st_copy(RCLASS(module)->iv_tbl);
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id = rb_intern("__classpath__");
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st_delete(RCLASS(clone)->iv_tbl, &id, 0);
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id = rb_intern("__classid__");
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st_delete(RCLASS(clone)->iv_tbl, &id, 0);
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}
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if (RCLASS(module)->m_tbl) {
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RCLASS(clone)->m_tbl = st_init_numtable();
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st_foreach(RCLASS(module)->m_tbl, clone_method, RCLASS(clone)->m_tbl);
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}
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return (VALUE)clone;
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}
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VALUE
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rb_mod_dup(mod)
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VALUE mod;
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{
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VALUE dup = rb_mod_clone(mod);
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RBASIC(dup)->flags = RBASIC(mod)->flags & (T_MASK|FL_TAINT|FL_SINGLETON);
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return dup;
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}
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VALUE
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rb_singleton_class_clone(obj)
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VALUE obj;
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{
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VALUE klass = RBASIC(obj)->klass;
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if (!FL_TEST(klass, FL_SINGLETON))
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return klass;
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else {
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/* copy singleton(unnamed) class */
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NEWOBJ(clone, struct RClass);
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OBJSETUP(clone, 0, RBASIC(klass)->flags);
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if (BUILTIN_TYPE(obj) == T_CLASS) {
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RBASIC(clone)->klass = (VALUE)clone;
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}
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else {
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RBASIC(clone)->klass = rb_singleton_class_clone(klass);
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}
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clone->super = RCLASS(klass)->super;
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clone->iv_tbl = 0;
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clone->m_tbl = 0;
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if (RCLASS(klass)->iv_tbl) {
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clone->iv_tbl = st_copy(RCLASS(klass)->iv_tbl);
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}
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clone->m_tbl = st_init_numtable();
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st_foreach(RCLASS(klass)->m_tbl, clone_method, clone->m_tbl);
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rb_singleton_class_attached(RBASIC(clone)->klass, (VALUE)clone);
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FL_SET(clone, FL_SINGLETON);
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return (VALUE)clone;
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}
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}
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void
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rb_singleton_class_attached(klass, obj)
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VALUE klass, obj;
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{
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if (FL_TEST(klass, FL_SINGLETON)) {
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if (!RCLASS(klass)->iv_tbl) {
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RCLASS(klass)->iv_tbl = st_init_numtable();
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}
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st_insert(RCLASS(klass)->iv_tbl, rb_intern("__attached__"), obj);
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}
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}
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VALUE
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rb_make_metaclass(obj, super)
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VALUE obj, super;
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{
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VALUE klass = rb_class_boot(super);
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FL_SET(klass, FL_SINGLETON);
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RBASIC(obj)->klass = klass;
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rb_singleton_class_attached(klass, obj);
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if (BUILTIN_TYPE(obj) == T_CLASS) {
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RBASIC(klass)->klass = klass;
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}
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return klass;
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}
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VALUE
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rb_define_class_id(id, super)
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ID id;
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VALUE super;
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{
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VALUE klass;
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if (!super) super = rb_cObject;
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klass = rb_class_new(super);
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rb_name_class(klass, id);
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rb_make_metaclass(klass, RBASIC(super)->klass);
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return klass;
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}
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VALUE
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rb_class_inherited(super, klass)
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VALUE super, klass;
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{
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if (!super) super = rb_cObject;
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return rb_funcall(super, rb_intern("inherited"), 1, klass);
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}
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VALUE
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rb_define_class(name, super)
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const char *name;
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VALUE super;
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{
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VALUE klass;
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ID id;
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id = rb_intern(name);
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if (rb_autoload_defined(id)) {
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rb_autoload_load(id);
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}
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if (rb_const_defined(rb_cObject, id)) {
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klass = rb_const_get(rb_cObject, id);
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if (TYPE(klass) != T_CLASS) {
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rb_raise(rb_eTypeError, "%s is not a class", name);
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}
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if (rb_class_real(RCLASS(klass)->super) != super) {
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rb_name_error(id, "%s is already defined", name);
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}
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return klass;
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}
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if (!super) {
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rb_warn("no super class for `%s', Object assumed", name);
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}
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klass = rb_define_class_id(id, super);
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rb_class_inherited(super, klass);
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st_add_direct(rb_class_tbl, id, klass);
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return klass;
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}
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VALUE
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rb_define_class_under(outer, name, super)
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VALUE outer;
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const char *name;
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VALUE super;
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{
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VALUE klass;
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ID id;
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id = rb_intern(name);
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if (rb_const_defined_at(outer, id)) {
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klass = rb_const_get(outer, id);
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if (TYPE(klass) != T_CLASS) {
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rb_raise(rb_eTypeError, "%s is not a class", name);
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}
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if (rb_class_real(RCLASS(klass)->super) != super) {
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rb_name_error(id, "%s is already defined", name);
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}
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return klass;
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}
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if (!super) {
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rb_warn("no super class for `%s::%s', Object assumed",
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rb_class2name(outer), name);
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}
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klass = rb_define_class_id(id, super);
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rb_set_class_path(klass, outer, name);
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rb_class_inherited(super, klass);
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rb_const_set(outer, id, klass);
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return klass;
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}
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VALUE
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rb_module_new()
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{
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NEWOBJ(mdl, struct RClass);
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OBJSETUP(mdl, rb_cModule, T_MODULE);
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mdl->super = 0;
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mdl->iv_tbl = 0;
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mdl->m_tbl = 0;
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mdl->m_tbl = st_init_numtable();
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return (VALUE)mdl;
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}
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VALUE
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rb_define_module_id(id)
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ID id;
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{
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VALUE mdl;
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mdl = rb_module_new();
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rb_name_class(mdl, id);
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return mdl;
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}
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VALUE
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rb_define_module(name)
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const char *name;
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{
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VALUE module;
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ID id;
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id = rb_intern(name);
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if (rb_autoload_defined(id)) {
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rb_autoload_load(id);
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}
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if (rb_const_defined(rb_cObject, id)) {
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module = rb_const_get(rb_cObject, id);
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if (TYPE(module) == T_MODULE)
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return module;
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rb_raise(rb_eTypeError, "%s is not a module", rb_class2name(CLASS_OF(module)));
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}
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module = rb_define_module_id(id);
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st_add_direct(rb_class_tbl, id, module);
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return module;
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}
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VALUE
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rb_define_module_under(outer, name)
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VALUE outer;
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const char *name;
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{
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VALUE module;
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ID id;
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id = rb_intern(name);
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if (rb_const_defined_at(outer, id)) {
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module = rb_const_get(outer, id);
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if (TYPE(module) == T_MODULE)
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return module;
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rb_raise(rb_eTypeError, "%s::%s is not a module",
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rb_class2name(outer), rb_class2name(CLASS_OF(module)));
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}
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module = rb_define_module_id(id);
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rb_const_set(outer, id, module);
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rb_set_class_path(module, outer, name);
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return module;
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}
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static VALUE
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include_class_new(module, super)
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VALUE module, super;
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{
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NEWOBJ(klass, struct RClass);
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OBJSETUP(klass, rb_cClass, T_ICLASS);
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if (BUILTIN_TYPE(module) == T_ICLASS) {
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module = RBASIC(module)->klass;
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}
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if (!RCLASS(module)->iv_tbl) {
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RCLASS(module)->iv_tbl = st_init_numtable();
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}
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klass->iv_tbl = RCLASS(module)->iv_tbl;
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klass->m_tbl = RCLASS(module)->m_tbl;
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klass->super = super;
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if (TYPE(module) == T_ICLASS) {
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RBASIC(klass)->klass = RBASIC(module)->klass;
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}
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else {
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RBASIC(klass)->klass = module;
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}
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OBJ_INFECT(klass, module);
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OBJ_INFECT(klass, super);
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return (VALUE)klass;
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}
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void
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rb_include_module(klass, module)
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VALUE klass, module;
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{
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VALUE p, c;
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int changed = 0;
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rb_frozen_class_p(klass);
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if (!OBJ_TAINTED(klass)) {
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rb_secure(4);
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}
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if (NIL_P(module)) return;
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if (klass == module) return;
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switch (TYPE(module)) {
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case T_MODULE:
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case T_CLASS:
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case T_ICLASS:
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break;
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default:
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Check_Type(module, T_MODULE);
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}
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OBJ_INFECT(klass, module);
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c = klass;
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while (module) {
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int superclass_seen = Qfalse;
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if (RCLASS(klass)->m_tbl == RCLASS(module)->m_tbl)
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rb_raise(rb_eArgError, "cyclic include detected");
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/* ignore if the module included already in superclasses */
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for (p = RCLASS(klass)->super; p; p = RCLASS(p)->super) {
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switch (BUILTIN_TYPE(p)) {
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case T_ICLASS:
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if (RCLASS(p)->m_tbl == RCLASS(module)->m_tbl) {
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if (!superclass_seen) {
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c = p; /* move insertion point */
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}
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goto skip;
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}
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break;
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case T_CLASS:
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superclass_seen = Qtrue;
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break;
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}
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}
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c = RCLASS(c)->super = include_class_new(module, RCLASS(c)->super);
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changed = 1;
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skip:
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module = RCLASS(module)->super;
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}
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if (changed) rb_clear_cache();
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}
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VALUE
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rb_mod_included_modules(mod)
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VALUE mod;
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{
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VALUE ary = rb_ary_new();
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VALUE p;
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for (p = RCLASS(mod)->super; p; p = RCLASS(p)->super) {
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if (BUILTIN_TYPE(p) == T_ICLASS) {
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rb_ary_push(ary, RBASIC(p)->klass);
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}
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}
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return ary;
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}
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VALUE
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rb_mod_include_p(mod, mod2)
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VALUE mod;
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VALUE mod2;
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{
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VALUE p;
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Check_Type(mod2, T_MODULE);
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for (p = RCLASS(mod)->super; p; p = RCLASS(p)->super) {
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if (BUILTIN_TYPE(p) == T_ICLASS) {
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if (RBASIC(p)->klass == mod2) return Qtrue;
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}
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}
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return Qfalse;
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}
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VALUE
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rb_mod_ancestors(mod)
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VALUE mod;
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{
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VALUE ary = rb_ary_new();
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VALUE p;
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for (p = mod; p; p = RCLASS(p)->super) {
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if (FL_TEST(p, FL_SINGLETON))
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continue;
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if (BUILTIN_TYPE(p) == T_ICLASS) {
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rb_ary_push(ary, RBASIC(p)->klass);
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}
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else {
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rb_ary_push(ary, p);
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}
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}
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return ary;
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}
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static int
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ins_methods_i(key, body, ary)
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ID key;
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NODE *body;
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VALUE ary;
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{
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if ((body->nd_noex&(NOEX_PRIVATE|NOEX_PROTECTED)) == 0) {
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VALUE name = rb_str_new2(rb_id2name(key));
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if (!rb_ary_includes(ary, name)) {
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if (!body->nd_body) {
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rb_ary_push(ary, Qnil);
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}
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rb_ary_push(ary, name);
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}
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}
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else if (body->nd_body && nd_type(body->nd_body) == NODE_ZSUPER) {
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rb_ary_push(ary, Qnil);
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rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
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}
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return ST_CONTINUE;
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}
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static int
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ins_methods_prot_i(key, body, ary)
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ID key;
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NODE *body;
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VALUE ary;
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{
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if (!body->nd_body) {
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rb_ary_push(ary, Qnil);
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rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
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}
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else if (body->nd_noex & NOEX_PROTECTED) {
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VALUE name = rb_str_new2(rb_id2name(key));
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if (!rb_ary_includes(ary, name)) {
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rb_ary_push(ary, name);
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}
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}
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else if (nd_type(body->nd_body) == NODE_ZSUPER) {
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rb_ary_push(ary, Qnil);
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rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
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}
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return ST_CONTINUE;
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}
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static int
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ins_methods_priv_i(key, body, ary)
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ID key;
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NODE *body;
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VALUE ary;
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{
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if (!body->nd_body) {
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rb_ary_push(ary, Qnil);
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rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
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}
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else if (body->nd_noex & NOEX_PRIVATE) {
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VALUE name = rb_str_new2(rb_id2name(key));
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if (!rb_ary_includes(ary, name)) {
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rb_ary_push(ary, name);
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}
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}
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else if (nd_type(body->nd_body) == NODE_ZSUPER) {
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rb_ary_push(ary, Qnil);
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rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
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}
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return ST_CONTINUE;
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}
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static VALUE
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method_list(mod, option, func)
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VALUE mod;
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int option;
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int (*func)();
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{
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VALUE ary;
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VALUE klass;
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VALUE *p, *q, *pend;
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ary = rb_ary_new();
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for (klass = mod; klass; klass = RCLASS(klass)->super) {
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st_foreach(RCLASS(klass)->m_tbl, func, ary);
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if (!option) break;
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}
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p = q = RARRAY(ary)->ptr; pend = p + RARRAY(ary)->len;
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while (p < pend) {
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if (*p == Qnil) {
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p+=2;
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continue;
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}
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*q++ = *p++;
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}
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RARRAY(ary)->len = q - RARRAY(ary)->ptr;
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return ary;
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}
|
|
|
|
VALUE
|
|
rb_class_instance_methods(argc, argv, mod)
|
|
int argc;
|
|
VALUE *argv;
|
|
VALUE mod;
|
|
{
|
|
VALUE option;
|
|
|
|
rb_scan_args(argc, argv, "01", &option);
|
|
return method_list(mod, RTEST(option), ins_methods_i);
|
|
}
|
|
|
|
VALUE
|
|
rb_class_protected_instance_methods(argc, argv, mod)
|
|
int argc;
|
|
VALUE *argv;
|
|
VALUE mod;
|
|
{
|
|
VALUE option;
|
|
|
|
rb_scan_args(argc, argv, "01", &option);
|
|
return method_list(mod, RTEST(option), ins_methods_prot_i);
|
|
}
|
|
|
|
VALUE
|
|
rb_class_private_instance_methods(argc, argv, mod)
|
|
int argc;
|
|
VALUE *argv;
|
|
VALUE mod;
|
|
{
|
|
VALUE option;
|
|
|
|
rb_scan_args(argc, argv, "01", &option);
|
|
return method_list(mod, RTEST(option), ins_methods_priv_i);
|
|
}
|
|
|
|
VALUE
|
|
rb_obj_singleton_methods(argc, argv, obj)
|
|
int argc;
|
|
VALUE *argv;
|
|
VALUE obj;
|
|
{
|
|
VALUE all;
|
|
VALUE ary;
|
|
VALUE klass;
|
|
VALUE *p, *q, *pend;
|
|
|
|
rb_scan_args(argc, argv, "01", &all);
|
|
ary = rb_ary_new();
|
|
klass = CLASS_OF(obj);
|
|
while (klass && FL_TEST(klass, FL_SINGLETON)) {
|
|
st_foreach(RCLASS(klass)->m_tbl, ins_methods_i, ary);
|
|
klass = RCLASS(klass)->super;
|
|
}
|
|
if (RTEST(all)) {
|
|
while (klass && TYPE(klass) == T_ICLASS) {
|
|
st_foreach(RCLASS(klass)->m_tbl, ins_methods_i, ary);
|
|
klass = RCLASS(klass)->super;
|
|
}
|
|
}
|
|
p = q = RARRAY(ary)->ptr; pend = p + RARRAY(ary)->len;
|
|
while (p < pend) {
|
|
if (*p == Qnil) {
|
|
p+=2;
|
|
continue;
|
|
}
|
|
*q++ = *p++;
|
|
}
|
|
RARRAY(ary)->len = q - RARRAY(ary)->ptr;
|
|
|
|
return ary;
|
|
}
|
|
|
|
void
|
|
rb_define_method_id(klass, name, func, argc)
|
|
VALUE klass;
|
|
ID name;
|
|
VALUE (*func)();
|
|
int argc;
|
|
{
|
|
rb_add_method(klass, name, NEW_CFUNC(func,argc), NOEX_PUBLIC|NOEX_CFUNC);
|
|
}
|
|
|
|
void
|
|
rb_define_method(klass, name, func, argc)
|
|
VALUE klass;
|
|
const char *name;
|
|
VALUE (*func)();
|
|
int argc;
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
rb_add_method(klass, id, NEW_CFUNC(func, argc),
|
|
((name[0] == 'i' && id == rb_intern("initialize"))?
|
|
NOEX_PRIVATE:NOEX_PUBLIC)|NOEX_CFUNC);
|
|
}
|
|
|
|
void
|
|
rb_define_protected_method(klass, name, func, argc)
|
|
VALUE klass;
|
|
const char *name;
|
|
VALUE (*func)();
|
|
int argc;
|
|
{
|
|
rb_add_method(klass, rb_intern(name), NEW_CFUNC(func, argc),
|
|
NOEX_PROTECTED|NOEX_CFUNC);
|
|
}
|
|
|
|
void
|
|
rb_define_private_method(klass, name, func, argc)
|
|
VALUE klass;
|
|
const char *name;
|
|
VALUE (*func)();
|
|
int argc;
|
|
{
|
|
rb_add_method(klass, rb_intern(name), NEW_CFUNC(func, argc),
|
|
NOEX_PRIVATE|NOEX_CFUNC);
|
|
}
|
|
|
|
void
|
|
rb_undef_method(klass, name)
|
|
VALUE klass;
|
|
const char *name;
|
|
{
|
|
rb_add_method(klass, rb_intern(name), 0, NOEX_UNDEF);
|
|
}
|
|
|
|
#define SPECIAL_SINGLETON(x,c) do {\
|
|
if (obj == (x)) {\
|
|
return c;\
|
|
}\
|
|
} while (0)
|
|
|
|
VALUE
|
|
rb_singleton_class(obj)
|
|
VALUE obj;
|
|
{
|
|
VALUE klass;
|
|
|
|
if (FIXNUM_P(obj) || SYMBOL_P(obj)) {
|
|
rb_raise(rb_eTypeError, "can't define singleton");
|
|
}
|
|
if (rb_special_const_p(obj)) {
|
|
SPECIAL_SINGLETON(Qnil, rb_cNilClass);
|
|
SPECIAL_SINGLETON(Qfalse, rb_cFalseClass);
|
|
SPECIAL_SINGLETON(Qtrue, rb_cTrueClass);
|
|
rb_bug("unknown immediate %ld", obj);
|
|
}
|
|
|
|
DEFER_INTS;
|
|
if (FL_TEST(RBASIC(obj)->klass, FL_SINGLETON) &&
|
|
(BUILTIN_TYPE(obj) == T_CLASS || /* metaclass (or metaclass of metaclass) */
|
|
rb_iv_get(RBASIC(obj)->klass, "__attached__") == obj)) {
|
|
klass = RBASIC(obj)->klass;
|
|
}
|
|
else {
|
|
klass = rb_make_metaclass(obj, RBASIC(obj)->klass);
|
|
}
|
|
if (OBJ_TAINTED(obj)) {
|
|
OBJ_TAINT(klass);
|
|
}
|
|
else {
|
|
FL_UNSET(klass, FL_TAINT);
|
|
}
|
|
if (OBJ_FROZEN(obj)) OBJ_FREEZE(klass);
|
|
ALLOW_INTS;
|
|
|
|
return klass;
|
|
}
|
|
|
|
void
|
|
rb_define_singleton_method(obj, name, func, argc)
|
|
VALUE obj;
|
|
const char *name;
|
|
VALUE (*func)();
|
|
int argc;
|
|
{
|
|
rb_define_method(rb_singleton_class(obj), name, func, argc);
|
|
}
|
|
|
|
void
|
|
rb_define_module_function(module, name, func, argc)
|
|
VALUE module;
|
|
const char *name;
|
|
VALUE (*func)();
|
|
int argc;
|
|
{
|
|
rb_define_private_method(module, name, func, argc);
|
|
rb_define_singleton_method(module, name, func, argc);
|
|
}
|
|
|
|
void
|
|
rb_define_global_function(name, func, argc)
|
|
const char *name;
|
|
VALUE (*func)();
|
|
int argc;
|
|
{
|
|
rb_define_module_function(rb_mKernel, name, func, argc);
|
|
}
|
|
|
|
void
|
|
rb_define_alias(klass, name1, name2)
|
|
VALUE klass;
|
|
const char *name1, *name2;
|
|
{
|
|
rb_alias(klass, rb_intern(name1), rb_intern(name2));
|
|
}
|
|
|
|
void
|
|
rb_define_attr(klass, name, read, write)
|
|
VALUE klass;
|
|
const char *name;
|
|
int read, write;
|
|
{
|
|
rb_attr(klass, rb_intern(name), read, write, Qfalse);
|
|
}
|
|
|
|
#ifdef HAVE_STDARG_PROTOTYPES
|
|
#include <stdarg.h>
|
|
#define va_init_list(a,b) va_start(a,b)
|
|
#else
|
|
#include <varargs.h>
|
|
#define va_init_list(a,b) va_start(a)
|
|
#endif
|
|
|
|
int
|
|
#ifdef HAVE_STDARG_PROTOTYPES
|
|
rb_scan_args(int argc, const VALUE *argv, const char *fmt, ...)
|
|
#else
|
|
rb_scan_args(argc, argv, fmt, va_alist)
|
|
int argc;
|
|
const VALUE *argv;
|
|
const char *fmt;
|
|
va_dcl
|
|
#endif
|
|
{
|
|
int n, i = 0;
|
|
const char *p = fmt;
|
|
VALUE *var;
|
|
va_list vargs;
|
|
|
|
va_init_list(vargs, fmt);
|
|
|
|
if (*p == '*') goto rest_arg;
|
|
|
|
if (ISDIGIT(*p)) {
|
|
n = *p - '0';
|
|
if (n > argc)
|
|
rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", argc, n);
|
|
for (i=0; i<n; i++) {
|
|
var = va_arg(vargs, VALUE*);
|
|
if (var) *var = argv[i];
|
|
}
|
|
p++;
|
|
}
|
|
else {
|
|
goto error;
|
|
}
|
|
|
|
if (ISDIGIT(*p)) {
|
|
n = i + *p - '0';
|
|
for (; i<n; i++) {
|
|
var = va_arg(vargs, VALUE*);
|
|
if (argc > i) {
|
|
if (var) *var = argv[i];
|
|
}
|
|
else {
|
|
if (var) *var = Qnil;
|
|
}
|
|
}
|
|
p++;
|
|
}
|
|
|
|
if(*p == '*') {
|
|
rest_arg:
|
|
var = va_arg(vargs, VALUE*);
|
|
if (argc > i) {
|
|
if (var) *var = rb_ary_new4(argc-i, argv+i);
|
|
i = argc;
|
|
}
|
|
else {
|
|
if (var) *var = rb_ary_new();
|
|
}
|
|
p++;
|
|
}
|
|
|
|
if (*p == '&') {
|
|
var = va_arg(vargs, VALUE*);
|
|
if (rb_block_given_p()) {
|
|
*var = rb_f_lambda();
|
|
}
|
|
else {
|
|
*var = Qnil;
|
|
}
|
|
p++;
|
|
}
|
|
va_end(vargs);
|
|
|
|
if (*p != '\0') {
|
|
goto error;
|
|
}
|
|
|
|
if (argc > i) {
|
|
rb_raise(rb_eArgError, "wrong number of arguments(%d for %d)", argc, i);
|
|
}
|
|
|
|
return argc;
|
|
|
|
error:
|
|
rb_fatal("bad scan arg format: %s", fmt);
|
|
return 0;
|
|
}
|