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* hash.c: Add Hash#to_h [Feature #6276]

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[rubyspec:84b7fe3f24d2]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35339 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
marcandre 2012-04-16 03:15:42 +00:00
parent 0c7163ae5e
commit f92be2c01a
2 changed files with 27 additions and 0 deletions
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2
NEWS
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@ -22,6 +22,8 @@ with all sufficient information, see the ChangeLog file.
* added Enumerable#lazy method for lazy enumeration.
* Hash
* added method:
* added Hash#to_h as explicit conversion method, like Array#to_a.
* extended method:
* Hash#default_proc= can be passed nil to clear the default proc.

25
hash.c
View File

@ -1452,6 +1452,30 @@ rb_hash_to_hash(VALUE hash)
return hash;
}
/*
* call-seq:
* hsh.to_h -> hsh or new_hash
*
* Returns +self+. If called on a subclass of Hash, converts
* the receiver to a Hash object.
*/
static VALUE
rb_hash_to_h(VALUE hash)
{
if (rb_obj_class(hash) != rb_cHash) {
VALUE ret = rb_hash_new();
if (!RHASH_EMPTY_P(hash))
RHASH(ret)->ntbl = st_copy(RHASH(hash)->ntbl);
if (FL_TEST(hash, HASH_PROC_DEFAULT)) {
FL_SET(ret, HASH_PROC_DEFAULT);
}
RHASH_IFNONE(ret) = RHASH_IFNONE(hash);
return ret;
}
return hash;
}
static int
keys_i(VALUE key, VALUE value, VALUE ary)
{
@ -3333,6 +3357,7 @@ Init_Hash(void)
rb_define_method(rb_cHash,"rehash", rb_hash_rehash, 0);
rb_define_method(rb_cHash,"to_hash", rb_hash_to_hash, 0);
rb_define_method(rb_cHash,"to_h", rb_hash_to_h, 0);
rb_define_method(rb_cHash,"to_a", rb_hash_to_a, 0);
rb_define_method(rb_cHash,"inspect", rb_hash_inspect, 0);
rb_define_alias(rb_cHash, "to_s", "inspect");