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ruby--ruby/struct.c
Burdette Lamar 39a6bf5513
Enhanced RDoc for Struct (#4891) 
Treats:

    #values_at
    #select
    #==
    #hash
    #eql?
    #size
    #dig
2021-09-24 18:41:02 -05:00

1619 lines
42 KiB
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/**********************************************************************
struct.c -
$Author$
created at: Tue Mar 22 18:44:30 JST 1995
Copyright (C) 1993-2007 Yukihiro Matsumoto
**********************************************************************/
#include "id.h"
#include "internal.h"
#include "internal/class.h"
#include "internal/error.h"
#include "internal/hash.h"
#include "internal/object.h"
#include "internal/proc.h"
#include "internal/struct.h"
#include "internal/symbol.h"
#include "transient_heap.h"
#include "vm_core.h"
#include "builtin.h"
/* only for struct[:field] access */
enum {
AREF_HASH_UNIT = 5,
AREF_HASH_THRESHOLD = 10
};
const rb_iseq_t *rb_method_for_self_aref(VALUE name, VALUE arg, const struct rb_builtin_function *func);
const rb_iseq_t *rb_method_for_self_aset(VALUE name, VALUE arg, const struct rb_builtin_function *func);
VALUE rb_cStruct;
static ID id_members, id_back_members, id_keyword_init;
static VALUE struct_alloc(VALUE);
static inline VALUE
struct_ivar_get(VALUE c, ID id)
{
VALUE orig = c;
VALUE ivar = rb_attr_get(c, id);
if (!NIL_P(ivar))
return ivar;
for (;;) {
c = RCLASS_SUPER(c);
if (c == 0 || c == rb_cStruct)
return Qnil;
ivar = rb_attr_get(c, id);
if (!NIL_P(ivar)) {
return rb_ivar_set(orig, id, ivar);
}
}
}
VALUE
rb_struct_s_keyword_init(VALUE klass)
{
return struct_ivar_get(klass, id_keyword_init);
}
VALUE
rb_struct_s_members(VALUE klass)
{
VALUE members = struct_ivar_get(klass, id_members);
if (NIL_P(members)) {
rb_raise(rb_eTypeError, "uninitialized struct");
}
if (!RB_TYPE_P(members, T_ARRAY)) {
rb_raise(rb_eTypeError, "corrupted struct");
}
return members;
}
VALUE
rb_struct_members(VALUE s)
{
VALUE members = rb_struct_s_members(rb_obj_class(s));
if (RSTRUCT_LEN(s) != RARRAY_LEN(members)) {
rb_raise(rb_eTypeError, "struct size differs (%ld required %ld given)",
RARRAY_LEN(members), RSTRUCT_LEN(s));
}
return members;
}
static long
struct_member_pos_ideal(VALUE name, long mask)
{
/* (id & (mask/2)) * 2 */
return (SYM2ID(name) >> (ID_SCOPE_SHIFT - 1)) & mask;
}
static long
struct_member_pos_probe(long prev, long mask)
{
/* (((prev/2) * AREF_HASH_UNIT + 1) & (mask/2)) * 2 */
return (prev * AREF_HASH_UNIT + 2) & mask;
}
static VALUE
struct_set_members(VALUE klass, VALUE /* frozen hidden array */ members)
{
VALUE back;
const long members_length = RARRAY_LEN(members);
if (members_length <= AREF_HASH_THRESHOLD) {
back = members;
}
else {
long i, j, mask = 64;
VALUE name;
while (mask < members_length * AREF_HASH_UNIT) mask *= 2;
back = rb_ary_tmp_new(mask + 1);
rb_ary_store(back, mask, INT2FIX(members_length));
mask -= 2; /* mask = (2**k-1)*2 */
for (i=0; i < members_length; i++) {
name = RARRAY_AREF(members, i);
j = struct_member_pos_ideal(name, mask);
for (;;) {
if (!RTEST(RARRAY_AREF(back, j))) {
rb_ary_store(back, j, name);
rb_ary_store(back, j + 1, INT2FIX(i));
break;
}
j = struct_member_pos_probe(j, mask);
}
}
OBJ_FREEZE_RAW(back);
}
rb_ivar_set(klass, id_members, members);
rb_ivar_set(klass, id_back_members, back);
return members;
}
static inline int
struct_member_pos(VALUE s, VALUE name)
{
VALUE back = struct_ivar_get(rb_obj_class(s), id_back_members);
long j, mask;
if (UNLIKELY(NIL_P(back))) {
rb_raise(rb_eTypeError, "uninitialized struct");
}
if (UNLIKELY(!RB_TYPE_P(back, T_ARRAY))) {
rb_raise(rb_eTypeError, "corrupted struct");
}
mask = RARRAY_LEN(back);
if (mask <= AREF_HASH_THRESHOLD) {
if (UNLIKELY(RSTRUCT_LEN(s) != mask)) {
rb_raise(rb_eTypeError,
"struct size differs (%ld required %ld given)",
mask, RSTRUCT_LEN(s));
}
for (j = 0; j < mask; j++) {
if (RARRAY_AREF(back, j) == name)
return (int)j;
}
return -1;
}
if (UNLIKELY(RSTRUCT_LEN(s) != FIX2INT(RARRAY_AREF(back, mask-1)))) {
rb_raise(rb_eTypeError, "struct size differs (%d required %ld given)",
FIX2INT(RARRAY_AREF(back, mask-1)), RSTRUCT_LEN(s));
}
mask -= 3;
j = struct_member_pos_ideal(name, mask);
for (;;) {
VALUE e = RARRAY_AREF(back, j);
if (e == name)
return FIX2INT(RARRAY_AREF(back, j + 1));
if (!RTEST(e)) {
return -1;
}
j = struct_member_pos_probe(j, mask);
}
}
static VALUE
rb_struct_s_members_m(VALUE klass)
{
VALUE members = rb_struct_s_members(klass);
return rb_ary_dup(members);
}
/*
* call-seq:
* members -> array_of_symbols
*
* Returns the member names from +self+ as an array:
*
* Customer = Struct.new(:name, :address, :zip)
* Customer.new.members # => [:name, :address, :zip]
*
* Related: #to_a.
*/
static VALUE
rb_struct_members_m(VALUE obj)
{
return rb_struct_s_members_m(rb_obj_class(obj));
}
VALUE
rb_struct_getmember(VALUE obj, ID id)
{
VALUE slot = ID2SYM(id);
int i = struct_member_pos(obj, slot);
if (i != -1) {
return RSTRUCT_GET(obj, i);
}
rb_name_err_raise("`%1$s' is not a struct member", obj, ID2SYM(id));
UNREACHABLE_RETURN(Qnil);
}
static VALUE rb_struct_ref0(VALUE obj) {return RSTRUCT_GET(obj, 0);}
static VALUE rb_struct_ref1(VALUE obj) {return RSTRUCT_GET(obj, 1);}
static VALUE rb_struct_ref2(VALUE obj) {return RSTRUCT_GET(obj, 2);}
static VALUE rb_struct_ref3(VALUE obj) {return RSTRUCT_GET(obj, 3);}
static VALUE rb_struct_ref4(VALUE obj) {return RSTRUCT_GET(obj, 4);}
static VALUE rb_struct_ref5(VALUE obj) {return RSTRUCT_GET(obj, 5);}
static VALUE rb_struct_ref6(VALUE obj) {return RSTRUCT_GET(obj, 6);}
static VALUE rb_struct_ref7(VALUE obj) {return RSTRUCT_GET(obj, 7);}
static VALUE rb_struct_ref8(VALUE obj) {return RSTRUCT_GET(obj, 8);}
static VALUE rb_struct_ref9(VALUE obj) {return RSTRUCT_GET(obj, 9);}
#define N_REF_FUNC numberof(ref_func)
static VALUE (*const ref_func[])(VALUE) = {
rb_struct_ref0,
rb_struct_ref1,
rb_struct_ref2,
rb_struct_ref3,
rb_struct_ref4,
rb_struct_ref5,
rb_struct_ref6,
rb_struct_ref7,
rb_struct_ref8,
rb_struct_ref9,
};
static void
rb_struct_modify(VALUE s)
{
rb_check_frozen(s);
}
static VALUE
anonymous_struct(VALUE klass)
{
VALUE nstr;
nstr = rb_class_new(klass);
rb_make_metaclass(nstr, RBASIC(klass)->klass);
rb_class_inherited(klass, nstr);
return nstr;
}
static VALUE
new_struct(VALUE name, VALUE super)
{
/* old style: should we warn? */
ID id;
name = rb_str_to_str(name);
if (!rb_is_const_name(name)) {
rb_name_err_raise("identifier %1$s needs to be constant",
super, name);
}
id = rb_to_id(name);
if (rb_const_defined_at(super, id)) {
rb_warn("redefining constant %"PRIsVALUE"::%"PRIsVALUE, super, name);
rb_mod_remove_const(super, ID2SYM(id));
}
return rb_define_class_id_under(super, id, super);
}
NORETURN(static void invalid_struct_pos(VALUE s, VALUE idx));
static inline long
struct_pos_num(VALUE s, VALUE idx)
{
long i = NUM2INT(idx);
if (i < 0 || i >= RSTRUCT_LEN(s)) invalid_struct_pos(s, idx);
return i;
}
static VALUE
opt_struct_aref(rb_execution_context_t *ec, VALUE self, VALUE idx)
{
long i = struct_pos_num(self, idx);
return RSTRUCT_GET(self, i);
}
static VALUE
opt_struct_aset(rb_execution_context_t *ec, VALUE self, VALUE val, VALUE idx)
{
long i = struct_pos_num(self, idx);
rb_struct_modify(self);
RSTRUCT_SET(self, i, val);
return val;
}
static const struct rb_builtin_function struct_aref_builtin =
RB_BUILTIN_FUNCTION(0, struct_aref, opt_struct_aref, 1, 0);
static const struct rb_builtin_function struct_aset_builtin =
RB_BUILTIN_FUNCTION(1, struct_aref, opt_struct_aset, 2, 0);
static void
define_aref_method(VALUE nstr, VALUE name, VALUE off)
{
const rb_iseq_t *iseq = rb_method_for_self_aref(name, off, &struct_aref_builtin);
iseq->body->builtin_inline_p = true;
rb_add_method_iseq(nstr, SYM2ID(name), iseq, NULL, METHOD_VISI_PUBLIC);
}
static void
define_aset_method(VALUE nstr, VALUE name, VALUE off)
{
const rb_iseq_t *iseq = rb_method_for_self_aset(name, off, &struct_aset_builtin);
rb_add_method_iseq(nstr, SYM2ID(name), iseq, NULL, METHOD_VISI_PUBLIC);
}
static VALUE
rb_struct_s_inspect(VALUE klass)
{
VALUE inspect = rb_class_name(klass);
if (RTEST(rb_struct_s_keyword_init(klass))) {
rb_str_cat_cstr(inspect, "(keyword_init: true)");
}
return inspect;
}
/*
* call-seq:
* StructClass.keyword_init? -> true or false
*
* Returns true if the class was initialized with +keyword_init: true+.
* Otherwise returns false.
*
* Examples:
* Foo = Struct.new(:a)
* Foo.keyword_init? # => nil
* Bar = Struct.new(:a, keyword_init: true)
* Bar.keyword_init? # => true
* Baz = Struct.new(:a, keyword_init: false)
* Baz.keyword_init? # => false
*/
#define rb_struct_s_keyword_init_p rb_struct_s_keyword_init
static VALUE
setup_struct(VALUE nstr, VALUE members)
{
long i, len;
members = struct_set_members(nstr, members);
rb_define_alloc_func(nstr, struct_alloc);
rb_define_singleton_method(nstr, "new", rb_class_new_instance_pass_kw, -1);
rb_define_singleton_method(nstr, "[]", rb_class_new_instance_pass_kw, -1);
rb_define_singleton_method(nstr, "members", rb_struct_s_members_m, 0);
rb_define_singleton_method(nstr, "inspect", rb_struct_s_inspect, 0);
rb_define_singleton_method(nstr, "keyword_init?", rb_struct_s_keyword_init_p, 0);
len = RARRAY_LEN(members);
for (i=0; i< len; i++) {
VALUE sym = RARRAY_AREF(members, i);
ID id = SYM2ID(sym);
VALUE off = LONG2NUM(i);
if (i < N_REF_FUNC) {
rb_define_method_id(nstr, id, ref_func[i], 0);
}
else {
define_aref_method(nstr, sym, off);
}
define_aset_method(nstr, ID2SYM(rb_id_attrset(id)), off);
}
return nstr;
}
VALUE
rb_struct_alloc_noinit(VALUE klass)
{
return struct_alloc(klass);
}
static VALUE
struct_make_members_list(va_list ar)
{
char *mem;
VALUE ary, list = rb_ident_hash_new();
st_table *tbl = RHASH_TBL_RAW(list);
RBASIC_CLEAR_CLASS(list);
OBJ_WB_UNPROTECT(list);
while ((mem = va_arg(ar, char*)) != 0) {
VALUE sym = rb_sym_intern_ascii_cstr(mem);
if (st_insert(tbl, sym, Qtrue)) {
rb_raise(rb_eArgError, "duplicate member: %s", mem);
}
}
ary = rb_hash_keys(list);
st_clear(tbl);
RBASIC_CLEAR_CLASS(ary);
OBJ_FREEZE_RAW(ary);
return ary;
}
static VALUE
struct_define_without_accessor(VALUE outer, const char *class_name, VALUE super, rb_alloc_func_t alloc, VALUE members)
{
VALUE klass;
if (class_name) {
if (outer) {
klass = rb_define_class_under(outer, class_name, super);
}
else {
klass = rb_define_class(class_name, super);
}
}
else {
klass = anonymous_struct(super);
}
struct_set_members(klass, members);
if (alloc) {
rb_define_alloc_func(klass, alloc);
}
else {
rb_define_alloc_func(klass, struct_alloc);
}
return klass;
}
VALUE
rb_struct_define_without_accessor_under(VALUE outer, const char *class_name, VALUE super, rb_alloc_func_t alloc, ...)
{
va_list ar;
VALUE members;
va_start(ar, alloc);
members = struct_make_members_list(ar);
va_end(ar);
return struct_define_without_accessor(outer, class_name, super, alloc, members);
}
VALUE
rb_struct_define_without_accessor(const char *class_name, VALUE super, rb_alloc_func_t alloc, ...)
{
va_list ar;
VALUE members;
va_start(ar, alloc);
members = struct_make_members_list(ar);
va_end(ar);
return struct_define_without_accessor(0, class_name, super, alloc, members);
}
VALUE
rb_struct_define(const char *name, ...)
{
va_list ar;
VALUE st, ary;
va_start(ar, name);
ary = struct_make_members_list(ar);
va_end(ar);
if (!name) st = anonymous_struct(rb_cStruct);
else st = new_struct(rb_str_new2(name), rb_cStruct);
return setup_struct(st, ary);
}
VALUE
rb_struct_define_under(VALUE outer, const char *name, ...)
{
va_list ar;
VALUE ary;
va_start(ar, name);
ary = struct_make_members_list(ar);
va_end(ar);
return setup_struct(rb_define_class_under(outer, name, rb_cStruct), ary);
}
/*
* call-seq:
* Struct.new(*member_names, keyword_init: false){|Struct_subclass| ... } -> Struct_subclass
* Struct.new(class_name, *member_names, keyword_init: false){|Struct_subclass| ... } -> Struct_subclass
* Struct_subclass.new(*member_names) -> Struct_subclass_instance
* Struct_subclass.new(**member_names) -> Struct_subclass_instance
*
* <tt>Struct.new</tt> returns a new subclass of +Struct+. The new subclass:
*
* - May be anonymous, or may have the name given by +class_name+.
* - May have members as given by +member_names+.
* - May have initialization via ordinary arguments (the default)
* or via keyword arguments (if <tt>keyword_init: true</tt> is given).
*
* The new subclass has its own method <tt>::new</tt>; thus:
*
* Foo = Struct.new('Foo', :foo, :bar) # => Struct::Foo
* f = Foo.new(0, 1) # => #<struct Struct::Foo foo=0, bar=1>
*
* <b>\Class Name</b>
*
* With string argument +class_name+,
* returns a new subclass of +Struct+ named <tt>Struct::<em>class_name</em></tt>:
*
* Foo = Struct.new('Foo', :foo, :bar) # => Struct::Foo
* Foo.name # => "Struct::Foo"
* Foo.superclass # => Struct
*
* Without string argument +class_name+,
* returns a new anonymous subclass of +Struct+:
*
* Struct.new(:foo, :bar).name # => nil
*
* <b>Block</b>
*
* With a block given, the created subclass is yielded to the block:
*
* Customer = Struct.new('Customer', :name, :address) do |new_class|
* p "The new subclass is #{new_class}"
* def greeting
* "Hello #{name} at #{address}"
* end
* end # => Struct::Customer
* dave = Customer.new('Dave', '123 Main')
* dave # => #<struct Struct::Customer name="Dave", address="123 Main">
* dave.greeting # => "Hello Dave at 123 Main"
*
* Output, from <tt>Struct.new</tt>:
*
* "The new subclass is Struct::Customer"
*
* <b>Member Names</b>
*
* \Symbol arguments +member_names+
* determines the members of the new subclass:
*
* Struct.new(:foo, :bar).members # => [:foo, :bar]
* Struct.new('Foo', :foo, :bar).members # => [:foo, :bar]
*
* The new subclass has instance methods corresponding to +member_names+:
*
* Foo = Struct.new('Foo', :foo, :bar)
* Foo.instance_methods(false) # => [:foo, :bar, :foo=, :bar=]
* f = Foo.new # => #<struct Struct::Foo foo=nil, bar=nil>
* f.foo # => nil
* f.foo = 0 # => 0
* f.bar # => nil
* f.bar = 1 # => 1
* f # => #<struct Struct::Foo foo=0, bar=1>
*
* <b>Singleton Methods</b>
*
* A subclass returned by Struct.new has these singleton methods:
*
* - \Method <tt>::new </tt> creates an instance of the subclass:
*
* Foo.new # => #<struct Struct::Foo foo=nil, bar=nil>
* Foo.new(0) # => #<struct Struct::Foo foo=0, bar=nil>
* Foo.new(0, 1) # => #<struct Struct::Foo foo=0, bar=1>
* Foo.new(0, 1, 2) # Raises ArgumentError: struct size differs
*
* \Method <tt>::[]</tt> is an alias for method <tt>::new</tt>.
*
* - \Method <tt>:inspect</tt> returns a string representation of the subclass:
*
* Foo.inspect
* # => "Struct::Foo"
*
* - \Method <tt>::members</tt> returns an array of the member names:
*
* Foo.members # => [:foo, :bar]
*
* <b>Keyword Argument</b>
*
* By default, the arguments for initializing an instance of the new subclass
* are ordinary arguments (not keyword arguments).
* With optional keyword argument <tt>keyword_init: true</tt>,
* the new subclass is initialized with keyword arguments:
*
* # Without keyword_init: true.
* Foo = Struct.new('Foo', :foo, :bar)
* Foo # => Struct::Foo
* Foo.new(0, 1) # => #<struct Struct::Foo foo=0, bar=1>
* # With keyword_init: true.
* Bar = Struct.new(:foo, :bar, keyword_init: true)
* Bar # => # => Bar(keyword_init: true)
* Bar.new(bar: 1, foo: 0) # => #<struct Bar foo=0, bar=1>
*
*/
static VALUE
rb_struct_s_def(int argc, VALUE *argv, VALUE klass)
{
VALUE name, rest, keyword_init = Qnil;
long i;
VALUE st;
st_table *tbl;
rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
name = argv[0];
if (SYMBOL_P(name)) {
name = Qnil;
}
else {
--argc;
++argv;
}
if (RB_TYPE_P(argv[argc-1], T_HASH)) {
static ID keyword_ids[1];
if (!keyword_ids[0]) {
keyword_ids[0] = rb_intern("keyword_init");
}
rb_get_kwargs(argv[argc-1], keyword_ids, 0, 1, &keyword_init);
if (keyword_init == Qundef) {
keyword_init = Qnil;
}
else if (RTEST(keyword_init)) {
keyword_init = Qtrue;
}
--argc;
}
rest = rb_ident_hash_new();
RBASIC_CLEAR_CLASS(rest);
OBJ_WB_UNPROTECT(rest);
tbl = RHASH_TBL_RAW(rest);
for (i=0; i<argc; i++) {
VALUE mem = rb_to_symbol(argv[i]);
if (rb_is_attrset_sym(mem)) {
rb_raise(rb_eArgError, "invalid struct member: %"PRIsVALUE, mem);
}
if (st_insert(tbl, mem, Qtrue)) {
rb_raise(rb_eArgError, "duplicate member: %"PRIsVALUE, mem);
}
}
rest = rb_hash_keys(rest);
st_clear(tbl);
RBASIC_CLEAR_CLASS(rest);
OBJ_FREEZE_RAW(rest);
if (NIL_P(name)) {
st = anonymous_struct(klass);
}
else {
st = new_struct(name, klass);
}
setup_struct(st, rest);
rb_ivar_set(st, id_keyword_init, keyword_init);
if (rb_block_given_p()) {
rb_mod_module_eval(0, 0, st);
}
return st;
}
static long
num_members(VALUE klass)
{
VALUE members;
members = struct_ivar_get(klass, id_members);
if (!RB_TYPE_P(members, T_ARRAY)) {
rb_raise(rb_eTypeError, "broken members");
}
return RARRAY_LEN(members);
}
/*
*/
struct struct_hash_set_arg {
VALUE self;
VALUE unknown_keywords;
};
static int rb_struct_pos(VALUE s, VALUE *name);
static int
struct_hash_set_i(VALUE key, VALUE val, VALUE arg)
{
struct struct_hash_set_arg *args = (struct struct_hash_set_arg *)arg;
int i = rb_struct_pos(args->self, &key);
if (i < 0) {
if (args->unknown_keywords == Qnil) {
args->unknown_keywords = rb_ary_new();
}
rb_ary_push(args->unknown_keywords, key);
}
else {
rb_struct_modify(args->self);
RSTRUCT_SET(args->self, i, val);
}
return ST_CONTINUE;
}
static VALUE
rb_struct_initialize_m(int argc, const VALUE *argv, VALUE self)
{
VALUE klass = rb_obj_class(self);
rb_struct_modify(self);
long n = num_members(klass);
if (argc == 0) {
rb_mem_clear((VALUE *)RSTRUCT_CONST_PTR(self), n);
return Qnil;
}
VALUE keyword_init = rb_struct_s_keyword_init(klass);
if (RTEST(keyword_init)) {
struct struct_hash_set_arg arg;
if (argc > 1 || !RB_TYPE_P(argv[0], T_HASH)) {
rb_raise(rb_eArgError, "wrong number of arguments (given %d, expected 0)", argc);
}
rb_mem_clear((VALUE *)RSTRUCT_CONST_PTR(self), n);
arg.self = self;
arg.unknown_keywords = Qnil;
rb_hash_foreach(argv[0], struct_hash_set_i, (VALUE)&arg);
if (arg.unknown_keywords != Qnil) {
rb_raise(rb_eArgError, "unknown keywords: %s",
RSTRING_PTR(rb_ary_join(arg.unknown_keywords, rb_str_new2(", "))));
}
}
else {
if (n < argc) {
rb_raise(rb_eArgError, "struct size differs");
}
if (keyword_init == Qnil && argc == 1 && RB_TYPE_P(argv[0], T_HASH) && rb_keyword_given_p()) {
rb_warn("Passing only keyword arguments to Struct#initialize will behave differently from Ruby 3.2. "\
"Please use a Hash literal like .new({k: v}) instead of .new(k: v).");
}
for (long i=0; i<argc; i++) {
RSTRUCT_SET(self, i, argv[i]);
}
if (n > argc) {
rb_mem_clear((VALUE *)RSTRUCT_CONST_PTR(self)+argc, n-argc);
}
}
return Qnil;
}
VALUE
rb_struct_initialize(VALUE self, VALUE values)
{
rb_struct_initialize_m(RARRAY_LENINT(values), RARRAY_CONST_PTR(values), self);
RB_GC_GUARD(values);
return Qnil;
}
static VALUE *
struct_heap_alloc(VALUE st, size_t len)
{
VALUE *ptr = rb_transient_heap_alloc((VALUE)st, sizeof(VALUE) * len);
if (ptr) {
RSTRUCT_TRANSIENT_SET(st);
return ptr;
}
else {
RSTRUCT_TRANSIENT_UNSET(st);
return ALLOC_N(VALUE, len);
}
}
#if USE_TRANSIENT_HEAP
void
rb_struct_transient_heap_evacuate(VALUE obj, int promote)
{
if (RSTRUCT_TRANSIENT_P(obj)) {
const VALUE *old_ptr = rb_struct_const_heap_ptr(obj);
VALUE *new_ptr;
long len = RSTRUCT_LEN(obj);
if (promote) {
new_ptr = ALLOC_N(VALUE, len);
FL_UNSET_RAW(obj, RSTRUCT_TRANSIENT_FLAG);
}
else {
new_ptr = struct_heap_alloc(obj, len);
}
MEMCPY(new_ptr, old_ptr, VALUE, len);
RSTRUCT(obj)->as.heap.ptr = new_ptr;
}
}
#endif
static VALUE
struct_alloc(VALUE klass)
{
long n;
NEWOBJ_OF(st, struct RStruct, klass, T_STRUCT | (RGENGC_WB_PROTECTED_STRUCT ? FL_WB_PROTECTED : 0));
n = num_members(klass);
if (0 < n && n <= RSTRUCT_EMBED_LEN_MAX) {
RBASIC(st)->flags &= ~RSTRUCT_EMBED_LEN_MASK;
RBASIC(st)->flags |= n << RSTRUCT_EMBED_LEN_SHIFT;
rb_mem_clear((VALUE *)st->as.ary, n);
}
else {
st->as.heap.ptr = struct_heap_alloc((VALUE)st, n);
rb_mem_clear((VALUE *)st->as.heap.ptr, n);
st->as.heap.len = n;
}
return (VALUE)st;
}
VALUE
rb_struct_alloc(VALUE klass, VALUE values)
{
return rb_class_new_instance(RARRAY_LENINT(values), RARRAY_CONST_PTR(values), klass);
}
VALUE
rb_struct_new(VALUE klass, ...)
{
VALUE tmpargs[N_REF_FUNC], *mem = tmpargs;
int size, i;
va_list args;
size = rb_long2int(num_members(klass));
if (size > numberof(tmpargs)) {
tmpargs[0] = rb_ary_tmp_new(size);
mem = RARRAY_PTR(tmpargs[0]);
}
va_start(args, klass);
for (i=0; i<size; i++) {
mem[i] = va_arg(args, VALUE);
}
va_end(args);
return rb_class_new_instance(size, mem, klass);
}
static VALUE
struct_enum_size(VALUE s, VALUE args, VALUE eobj)
{
return rb_struct_size(s);
}
/*
* call-seq:
* each {|value| ... } -> self
* each -> enumerator
*
* Calls the given block with the value of each member; returns +self+:
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe.each {|value| p value }
*
* Output:
*
* "Joe Smith"
* "123 Maple, Anytown NC"
* 12345
*
* Returns an Enumerator if no block is given.
*
* Related: #each_pair.
*/
static VALUE
rb_struct_each(VALUE s)
{
long i;
RETURN_SIZED_ENUMERATOR(s, 0, 0, struct_enum_size);
for (i=0; i<RSTRUCT_LEN(s); i++) {
rb_yield(RSTRUCT_GET(s, i));
}
return s;
}
/*
* call-seq:
* each_pair {|(name, value)| ... } -> self
* each_pair -> enumerator
*
* Calls the given block with each member name/value pair; returns +self+:
*
* Customer = Struct.new(:name, :address, :zip) # => Customer
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe.each_pair {|(name, value)| p "#{name} => #{value}" }
*
* Output:
*
* "name => Joe Smith"
* "address => 123 Maple, Anytown NC"
* "zip => 12345"
*
* Returns an Enumerator if no block is given.
*
* Related: #each.
*
*/
static VALUE
rb_struct_each_pair(VALUE s)
{
VALUE members;
long i;
RETURN_SIZED_ENUMERATOR(s, 0, 0, struct_enum_size);
members = rb_struct_members(s);
if (rb_block_pair_yield_optimizable()) {
for (i=0; i<RSTRUCT_LEN(s); i++) {
VALUE key = rb_ary_entry(members, i);
VALUE value = RSTRUCT_GET(s, i);
rb_yield_values(2, key, value);
}
}
else {
for (i=0; i<RSTRUCT_LEN(s); i++) {
VALUE key = rb_ary_entry(members, i);
VALUE value = RSTRUCT_GET(s, i);
rb_yield(rb_assoc_new(key, value));
}
}
return s;
}
static VALUE
inspect_struct(VALUE s, VALUE dummy, int recur)
{
VALUE cname = rb_class_path(rb_obj_class(s));
VALUE members, str = rb_str_new2("#<struct ");
long i, len;
char first = RSTRING_PTR(cname)[0];
if (recur || first != '#') {
rb_str_append(str, cname);
}
if (recur) {
return rb_str_cat2(str, ":...>");
}
members = rb_struct_members(s);
len = RSTRUCT_LEN(s);
for (i=0; i<len; i++) {
VALUE slot;
ID id;
if (i > 0) {
rb_str_cat2(str, ", ");
}
else if (first != '#') {
rb_str_cat2(str, " ");
}
slot = RARRAY_AREF(members, i);
id = SYM2ID(slot);
if (rb_is_local_id(id) || rb_is_const_id(id)) {
rb_str_append(str, rb_id2str(id));
}
else {
rb_str_append(str, rb_inspect(slot));
}
rb_str_cat2(str, "=");
rb_str_append(str, rb_inspect(RSTRUCT_GET(s, i)));
}
rb_str_cat2(str, ">");
return str;
}
/*
* call-seq:
* inspect -> string
*
* Returns a string representation of +self+:
*
* Customer = Struct.new(:name, :address, :zip) # => Customer
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe.inspect # => "#<struct Customer name=\"Joe Smith\", address=\"123 Maple, Anytown NC\", zip=12345>"
*
* Struct#to_s is an alias for Struct#inspect.
*
*/
static VALUE
rb_struct_inspect(VALUE s)
{
return rb_exec_recursive(inspect_struct, s, 0);
}
/*
* call-seq:
* to_a -> array
*
* Returns the values in +self+ as an array:
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe.to_a # => ["Joe Smith", "123 Maple, Anytown NC", 12345]
*
* Struct#values and Struct#deconstruct are aliases for Struct#to_a.
*
* Related: #members.
*/
static VALUE
rb_struct_to_a(VALUE s)
{
return rb_ary_new4(RSTRUCT_LEN(s), RSTRUCT_CONST_PTR(s));
}
/*
* call-seq:
* to_h -> hash
* to_h {|name, value| ... } -> hash
*
* Returns a hash containing the name and value for each member:
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* h = joe.to_h
* h # => {:name=>"Joe Smith", :address=>"123 Maple, Anytown NC", :zip=>12345}
*
* If a block is given, it is called with each name/value pair;
* the block should return a 2-element array whose elements will become
* a key/value pair in the returned hash:
*
* h = joe.to_h{|name, value| [name.upcase, value.to_s.upcase]}
* h # => {:NAME=>"JOE SMITH", :ADDRESS=>"123 MAPLE, ANYTOWN NC", :ZIP=>"12345"}
*
* Raises ArgumentError if the block returns an inappropriate value.
*
*/
static VALUE
rb_struct_to_h(VALUE s)
{
VALUE h = rb_hash_new_with_size(RSTRUCT_LEN(s));
VALUE members = rb_struct_members(s);
long i;
int block_given = rb_block_given_p();
for (i=0; i<RSTRUCT_LEN(s); i++) {
VALUE k = rb_ary_entry(members, i), v = RSTRUCT_GET(s, i);
if (block_given)
rb_hash_set_pair(h, rb_yield_values(2, k, v));
else
rb_hash_aset(h, k, v);
}
return h;
}
static VALUE
rb_struct_deconstruct_keys(VALUE s, VALUE keys)
{
VALUE h;
long i;
if (NIL_P(keys)) {
return rb_struct_to_h(s);
}
if (UNLIKELY(!RB_TYPE_P(keys, T_ARRAY))) {
rb_raise(rb_eTypeError,
"wrong argument type %"PRIsVALUE" (expected Array or nil)",
rb_obj_class(keys));
}
if (RSTRUCT_LEN(s) < RARRAY_LEN(keys)) {
return rb_hash_new_with_size(0);
}
h = rb_hash_new_with_size(RARRAY_LEN(keys));
for (i=0; i<RARRAY_LEN(keys); i++) {
VALUE key = RARRAY_AREF(keys, i);
int i = rb_struct_pos(s, &key);
if (i < 0) {
return h;
}
rb_hash_aset(h, key, RSTRUCT_GET(s, i));
}
return h;
}
/* :nodoc: */
VALUE
rb_struct_init_copy(VALUE copy, VALUE s)
{
long i, len;
if (!OBJ_INIT_COPY(copy, s)) return copy;
if (RSTRUCT_LEN(copy) != RSTRUCT_LEN(s)) {
rb_raise(rb_eTypeError, "struct size mismatch");
}
for (i=0, len=RSTRUCT_LEN(copy); i<len; i++) {
RSTRUCT_SET(copy, i, RSTRUCT_GET(s, i));
}
return copy;
}
static int
rb_struct_pos(VALUE s, VALUE *name)
{
long i;
VALUE idx = *name;
if (SYMBOL_P(idx)) {
return struct_member_pos(s, idx);
}
else if (RB_TYPE_P(idx, T_STRING)) {
idx = rb_check_symbol(name);
if (NIL_P(idx)) return -1;
return struct_member_pos(s, idx);
}
else {
long len;
i = NUM2LONG(idx);
len = RSTRUCT_LEN(s);
if (i < 0) {
if (i + len < 0) {
*name = LONG2FIX(i);
return -1;
}
i += len;
}
else if (len <= i) {
*name = LONG2FIX(i);
return -1;
}
return (int)i;
}
}
static void
invalid_struct_pos(VALUE s, VALUE idx)
{
if (FIXNUM_P(idx)) {
long i = FIX2INT(idx), len = RSTRUCT_LEN(s);
if (i < 0) {
rb_raise(rb_eIndexError, "offset %ld too small for struct(size:%ld)",
i, len);
}
else {
rb_raise(rb_eIndexError, "offset %ld too large for struct(size:%ld)",
i, len);
}
}
else {
rb_name_err_raise("no member '%1$s' in struct", s, idx);
}
}
/*
* call-seq:
* struct[name] -> object
* struct[n] -> object
*
* Returns a value from +self+.
*
* With symbol or string argument +name+ given, returns the value for the named member:
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe[:zip] # => 12345
*
* Raises NameError if +name+ is not the name of a member.
*
* With integer argument +n+ given, returns <tt>self.values[n]</tt>
* if +n+ is in range;
* see {Array Indexes}[Array.html#class-Array-label-Array+Indexes]:
*
* joe[2] # => 12345
* joe[-2] # => "123 Maple, Anytown NC"
*
* Raises IndexError if +n+ is out of range.
*
*/
VALUE
rb_struct_aref(VALUE s, VALUE idx)
{
int i = rb_struct_pos(s, &idx);
if (i < 0) invalid_struct_pos(s, idx);
return RSTRUCT_GET(s, i);
}
/*
* call-seq:
* struct[name] = value -> value
* struct[n] = value -> value
*
* Assigns a value to a member.
*
* With symbol or string argument +name+ given, assigns the given +value+
* to the named member; returns +value+:
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe[:zip] = 54321 # => 54321
* joe # => #<struct Customer name="Joe Smith", address="123 Maple, Anytown NC", zip=54321>
*
* Raises NameError if +name+ is not the name of a member.
*
* With integer argument +n+ given, assigns the given +value+
* to the +n+th member if +n+ is in range;
* see {Array Indexes}[Array.html#class-Array-label-Array+Indexes]:
*
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe[2] = 54321 # => 54321
* joe[-3] = 'Joseph Smith' # => "Joseph Smith"
* joe # => #<struct Customer name="Joseph Smith", address="123 Maple, Anytown NC", zip=54321>
*
* Raises IndexError if +n+ is out of range.
*
*/
VALUE
rb_struct_aset(VALUE s, VALUE idx, VALUE val)
{
int i = rb_struct_pos(s, &idx);
if (i < 0) invalid_struct_pos(s, idx);
rb_struct_modify(s);
RSTRUCT_SET(s, i, val);
return val;
}
FUNC_MINIMIZED(VALUE rb_struct_lookup(VALUE s, VALUE idx));
NOINLINE(static VALUE rb_struct_lookup_default(VALUE s, VALUE idx, VALUE notfound));
VALUE
rb_struct_lookup(VALUE s, VALUE idx)
{
return rb_struct_lookup_default(s, idx, Qnil);
}
static VALUE
rb_struct_lookup_default(VALUE s, VALUE idx, VALUE notfound)
{
int i = rb_struct_pos(s, &idx);
if (i < 0) return notfound;
return RSTRUCT_GET(s, i);
}
static VALUE
struct_entry(VALUE s, long n)
{
return rb_struct_aref(s, LONG2NUM(n));
}
/*
* call-seq:
* values_at(*integers) -> array
* values_at(integer_range) -> array
*
* Returns an array of values from +self+.
*
* With integer arguments +integers+ given,
* returns an array containing each value given by one of +integers+:
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe.values_at(0, 2) # => ["Joe Smith", 12345]
* joe.values_at(2, 0) # => [12345, "Joe Smith"]
* joe.values_at(2, 1, 0) # => [12345, "123 Maple, Anytown NC", "Joe Smith"]
* joe.values_at(0, -3) # => ["Joe Smith", "Joe Smith"]
*
* Raises IndexError if any of +integers+ is out of range;
* see {Array Indexes}[Array.html#class-Array-label-Array+Indexes].
*
* With integer range argument +integer_range+ given,
* returns an array containing each value given by the elements of the range;
* fills with +nil+ values for range elements larger than the structure:
*
* joe.values_at(0..2)
* # => ["Joe Smith", "123 Maple, Anytown NC", 12345]
* joe.values_at(-3..-1)
* # => ["Joe Smith", "123 Maple, Anytown NC", 12345]
* joe.values_at(1..4) # => ["123 Maple, Anytown NC", 12345, nil, nil]
*
* Raises RangeError if any element of the range is negative and out of range;
* see {Array Indexes}[Array.html#class-Array-label-Array+Indexes].
*
*/
static VALUE
rb_struct_values_at(int argc, VALUE *argv, VALUE s)
{
return rb_get_values_at(s, RSTRUCT_LEN(s), argc, argv, struct_entry);
}
/*
* call-seq:
* select {|value| ... } -> array
* select -> enumerator
*
* With a block given, returns an array of values from +self+
* for which the block returns a truthy value:
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* a = joe.select {|value| value.is_a?(String) }
* a # => ["Joe Smith", "123 Maple, Anytown NC"]
* a = joe.select {|value| value.is_a?(Integer) }
* a # => [12345]
*
* With no block given, returns an Enumerator.
*
* Struct#filter is an alias for Struct#select.
*/
static VALUE
rb_struct_select(int argc, VALUE *argv, VALUE s)
{
VALUE result;
long i;
rb_check_arity(argc, 0, 0);
RETURN_SIZED_ENUMERATOR(s, 0, 0, struct_enum_size);
result = rb_ary_new();
for (i = 0; i < RSTRUCT_LEN(s); i++) {
if (RTEST(rb_yield(RSTRUCT_GET(s, i)))) {
rb_ary_push(result, RSTRUCT_GET(s, i));
}
}
return result;
}
static VALUE
recursive_equal(VALUE s, VALUE s2, int recur)
{
long i, len;
if (recur) return Qtrue; /* Subtle! */
len = RSTRUCT_LEN(s);
for (i=0; i<len; i++) {
if (!rb_equal(RSTRUCT_GET(s, i), RSTRUCT_GET(s2, i))) return Qfalse;
}
return Qtrue;
}
/*
* call-seq:
* self == other -> true or false
*
* Returns +true+ if and only if the following are true; otherwise returns +false+:
*
* - <tt>other.class == self.class</tt>.
* - For each member name +name+, <tt>other.name == self.name</tt>.
*
* Examples:
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe_jr = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe_jr == joe # => true
* joe_jr[:name] = 'Joe Smith, Jr.'
* # => "Joe Smith, Jr."
* joe_jr == joe # => false
*/
static VALUE
rb_struct_equal(VALUE s, VALUE s2)
{
if (s == s2) return Qtrue;
if (!RB_TYPE_P(s2, T_STRUCT)) return Qfalse;
if (rb_obj_class(s) != rb_obj_class(s2)) return Qfalse;
if (RSTRUCT_LEN(s) != RSTRUCT_LEN(s2)) {
rb_bug("inconsistent struct"); /* should never happen */
}
return rb_exec_recursive_paired(recursive_equal, s, s2, s2);
}
/*
* call-seq:
* hash -> integer
*
* Returns the integer hash value for +self+.
*
* Two structs of the same class and with the same content
* will have the same hash code (and will compare using Struct#eql?):
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe_jr = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe.hash == joe_jr.hash # => true
* joe_jr[:name] = 'Joe Smith, Jr.'
* joe.hash == joe_jr.hash # => false
*
* Related: Object#hash.
*/
static VALUE
rb_struct_hash(VALUE s)
{
long i, len;
st_index_t h;
VALUE n;
h = rb_hash_start(rb_hash(rb_obj_class(s)));
len = RSTRUCT_LEN(s);
for (i = 0; i < len; i++) {
n = rb_hash(RSTRUCT_GET(s, i));
h = rb_hash_uint(h, NUM2LONG(n));
}
h = rb_hash_end(h);
return ST2FIX(h);
}
static VALUE
recursive_eql(VALUE s, VALUE s2, int recur)
{
long i, len;
if (recur) return Qtrue; /* Subtle! */
len = RSTRUCT_LEN(s);
for (i=0; i<len; i++) {
if (!rb_eql(RSTRUCT_GET(s, i), RSTRUCT_GET(s2, i))) return Qfalse;
}
return Qtrue;
}
/*
* call-seq:
* eql?(other) -> true or false
*
* Returns +true+ if and only if the following are true; otherwise returns +false+:
*
* - <tt>other.class == self.class</tt>.
* - For each member name +name+, <tt>other.name.eql?(self.name)</tt>.
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe_jr = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe_jr.eql?(joe) # => true
* joe_jr[:name] = 'Joe Smith, Jr.'
* joe_jr.eql?(joe) # => false
*
* Related: Object#==.
*/
static VALUE
rb_struct_eql(VALUE s, VALUE s2)
{
if (s == s2) return Qtrue;
if (!RB_TYPE_P(s2, T_STRUCT)) return Qfalse;
if (rb_obj_class(s) != rb_obj_class(s2)) return Qfalse;
if (RSTRUCT_LEN(s) != RSTRUCT_LEN(s2)) {
rb_bug("inconsistent struct"); /* should never happen */
}
return rb_exec_recursive_paired(recursive_eql, s, s2, s2);
}
/*
* call-seq:
* size -> integer
*
* Returns the number of members.
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe.size #=> 3
*
* Struct#length is an alias for Struct#size.
*/
VALUE
rb_struct_size(VALUE s)
{
return LONG2FIX(RSTRUCT_LEN(s));
}
/*
* call-seq:
* dig(name, *identifiers) -> object
* dig(n, *identifiers) -> object
*
* Finds and returns an object among nested objects.
* The nested objects may be instances of various classes.
* See {Dig Methods}[rdoc-ref:dig_methods.rdoc].
*
*
* Given symbol or string argument +name+,
* returns the object that is specified by +name+ and +identifiers+:
*
* Foo = Struct.new(:a)
* f = Foo.new(Foo.new({b: [1, 2, 3]}))
* f.dig(:a) # => #<struct Foo a={:b=>[1, 2, 3]}>
* f.dig(:a, :a) # => {:b=>[1, 2, 3]}
* f.dig(:a, :a, :b) # => [1, 2, 3]
* f.dig(:a, :a, :b, 0) # => 1
* f.dig(:b, 0) # => nil
*
* Given integer argument +n+,
* returns the object that is specified by +n+ and +identifiers+:
*
* f.dig(0) # => #<struct Foo a={:b=>[1, 2, 3]}>
* f.dig(0, 0) # => {:b=>[1, 2, 3]}
* f.dig(0, 0, :b) # => [1, 2, 3]
* f.dig(0, 0, :b, 0) # => 1
* f.dig(:b, 0) # => nil
*
*/
static VALUE
rb_struct_dig(int argc, VALUE *argv, VALUE self)
{
rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
self = rb_struct_lookup(self, *argv);
if (!--argc) return self;
++argv;
return rb_obj_dig(argc, argv, self, Qnil);
}
/*
* Document-class: Struct
*
* A Struct is a convenient way to bundle a number of attributes together,
* using accessor methods, without having to write an explicit class.
*
* The Struct class generates new subclasses that hold a set of members and
* their values. For each member a reader and writer method is created
* similar to Module#attr_accessor.
*
* Customer = Struct.new(:name, :address) do
* def greeting
* "Hello #{name}!"
* end
* end
*
* dave = Customer.new("Dave", "123 Main")
* dave.name #=> "Dave"
* dave.greeting #=> "Hello Dave!"
*
* See Struct::new for further examples of creating struct subclasses and
* instances.
*
* In the method descriptions that follow, a "member" parameter refers to a
* struct member which is either a quoted string (<code>"name"</code>) or a
* Symbol (<code>:name</code>).
*/
void
InitVM_Struct(void)
{
rb_cStruct = rb_define_class("Struct", rb_cObject);
rb_include_module(rb_cStruct, rb_mEnumerable);
rb_undef_alloc_func(rb_cStruct);
rb_define_singleton_method(rb_cStruct, "new", rb_struct_s_def, -1);
rb_define_method(rb_cStruct, "initialize", rb_struct_initialize_m, -1);
rb_define_method(rb_cStruct, "initialize_copy", rb_struct_init_copy, 1);
rb_define_method(rb_cStruct, "==", rb_struct_equal, 1);
rb_define_method(rb_cStruct, "eql?", rb_struct_eql, 1);
rb_define_method(rb_cStruct, "hash", rb_struct_hash, 0);
rb_define_method(rb_cStruct, "inspect", rb_struct_inspect, 0);
rb_define_alias(rb_cStruct, "to_s", "inspect");
rb_define_method(rb_cStruct, "to_a", rb_struct_to_a, 0);
rb_define_method(rb_cStruct, "to_h", rb_struct_to_h, 0);
rb_define_method(rb_cStruct, "values", rb_struct_to_a, 0);
rb_define_method(rb_cStruct, "size", rb_struct_size, 0);
rb_define_method(rb_cStruct, "length", rb_struct_size, 0);
rb_define_method(rb_cStruct, "each", rb_struct_each, 0);
rb_define_method(rb_cStruct, "each_pair", rb_struct_each_pair, 0);
rb_define_method(rb_cStruct, "[]", rb_struct_aref, 1);
rb_define_method(rb_cStruct, "[]=", rb_struct_aset, 2);
rb_define_method(rb_cStruct, "select", rb_struct_select, -1);
rb_define_method(rb_cStruct, "filter", rb_struct_select, -1);
rb_define_method(rb_cStruct, "values_at", rb_struct_values_at, -1);
rb_define_method(rb_cStruct, "members", rb_struct_members_m, 0);
rb_define_method(rb_cStruct, "dig", rb_struct_dig, -1);
rb_define_method(rb_cStruct, "deconstruct", rb_struct_to_a, 0);
rb_define_method(rb_cStruct, "deconstruct_keys", rb_struct_deconstruct_keys, 1);
}
#undef rb_intern
void
Init_Struct(void)
{
id_members = rb_intern("__members__");
id_back_members = rb_intern("__members_back__");
id_keyword_init = rb_intern("__keyword_init__");
InitVM(Struct);
}
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