diff options
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | hash.c | 25 |
2 files changed, 27 insertions, 0 deletions
@@ -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. @@ -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"); |