diff options
author | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2007-08-24 17:47:09 +0000 |
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committer | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2007-08-24 17:47:09 +0000 |
commit | 5e1c401ff5f72bb5e2bc6eb844b65977881a71c9 (patch) | |
tree | 71fa92ca4779e1d2cccbd5937ca834e4c6981533 /hash.c | |
parent | 487a7da22df69432d471a80982c446ec2e7db649 (diff) |
* array.c (rb_ary_s_try_convert): a new class method to convert
object or nil if it's not target-type. this mechanism is used
to convert types in the C implemented methods.
* hash.c (rb_hash_s_try_convert): ditto.
* io.c (rb_io_s_try_convert): ditto.
* re.c (rb_reg_s_try_convert): ditto.
* string.c (rb_str_s_try_convert): ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13251 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'hash.c')
-rw-r--r-- | hash.c | 18 |
1 files changed, 18 insertions, 0 deletions
@@ -336,6 +336,23 @@ to_hash(VALUE hash) return rb_convert_type(hash, T_HASH, "Hash", "to_hash"); } +/* + * call-seq: + * Hash.try_convert(obj) -> hash or nil + * + * Try to convert <i>obj</i> into a hash, using to_hash method. + * Returns converted hash or nil if <i>obj</i> cannot be converted + * for any reason. + * + * Hash.try_convert({1=>2}) # => {1=>2} + * Hash.try_convert("1=>2") # => nil + */ +static VALUE +rb_hash_s_try_convert(VALUE dummy, VALUE hash) +{ + return rb_check_convert_type(hash, T_HASH, "Hash", "to_hash"); +} + static int rb_hash_rehash_i(VALUE key, VALUE value, st_table *tbl) { @@ -2536,6 +2553,7 @@ Init_Hash(void) rb_define_alloc_func(rb_cHash, hash_alloc); rb_define_singleton_method(rb_cHash, "[]", rb_hash_s_create, -1); + rb_define_singleton_method(rb_cHash, "try_convert", rb_hash_s_try_convert, 1); rb_define_method(rb_cHash,"initialize", rb_hash_initialize, -1); rb_define_method(rb_cHash,"initialize_copy", rb_hash_replace, 1); rb_define_method(rb_cHash,"rehash", rb_hash_rehash, 0); |