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* hash.c (rb_hash_set_default_proc): add new method. a patch from

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Giuseppe Bilotta.  #419

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18577 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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matz 2008-08-13 08:44:17 +00:00
parent 3e7d8bf9f8
commit 8d4086d773
2 changed files with 38 additions and 0 deletions
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5
ChangeLog
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@ -3,6 +3,11 @@ Wed Aug 13 17:35:58 2008 Tanaka Akira <akr@fsij.org>
* transcode.c (transcode_restartable0): several local variables
removed.
Wed Aug 13 17:35:23 2008 Yukihiro Matsumoto <matz@ruby-lang.org>
* hash.c (rb_hash_set_default_proc): add new method. a patch from
Giuseppe Bilotta. #419
Wed Aug 13 17:31:12 2008 Yukihiro Matsumoto <matz@ruby-lang.org>
* vm_insnhelper.c (caller_setup_args): should ensure if the value

33
hash.c
View file

@ -11,6 +11,7 @@
**********************************************************************/
#include "eval_intern.h"
#include "ruby/ruby.h"
#include "ruby/st.h"
#include "ruby/util.h"
@ -623,6 +624,37 @@ rb_hash_default_proc(VALUE hash)
return Qnil;
}
/*
* call-seq:
* hsh.default_proc = proc_obj => proc_obj
*
* Sets the default proc to be executed on each key lookup.
*
* h.default_proc = proc do |hash, key|
* hash[key] = key + key
* end
* h[2] #=> 4
* h["cat"] #=> "catcat"
*/
static VALUE
rb_hash_set_default_proc(VALUE hash, VALUE proc)
{
VALUE b;
rb_hash_modify(hash);
b = rb_check_convert_type(proc, T_DATA, "Proc", "to_proc");
if (NIL_P(b) || !rb_obj_is_proc(b)) {
rb_raise(rb_eTypeError,
"wrong default_proc type %s (expected Proc)",
rb_obj_classname(proc));
}
proc = b;
RHASH(hash)->ifnone = proc;
FL_SET(hash, HASH_PROC_DEFAULT);
return proc;
}
static int
key_i(VALUE key, VALUE value, VALUE *args)
{
@ -2596,6 +2628,7 @@ Init_Hash(void)
rb_define_method(rb_cHash,"default", rb_hash_default, -1);
rb_define_method(rb_cHash,"default=", rb_hash_set_default, 1);
rb_define_method(rb_cHash,"default_proc", rb_hash_default_proc, 0);
rb_define_method(rb_cHash,"default_proc=", rb_hash_set_default_proc, 1);
rb_define_method(rb_cHash,"key", rb_hash_key, 1);
rb_define_method(rb_cHash,"index", rb_hash_index, 1);
rb_define_method(rb_cHash,"size", rb_hash_size, 0);