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authorkazu <kazu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2008-04-13 07:02:24 +0000
committerkazu <kazu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2008-04-13 07:02:24 +0000
commit7cb1d35e230bcab0e440c2198b367c7c8b8cac1d (patch)
tree8c6e591a314c1c19e6018d1764392f56b2338728 /object.c
parentb4c621b641f912cbc27fab01a73fcb84743c9d99 (diff)
* object.c (sym_to_proc): new method Symbol#to_proc; backported from 1.9. bug#19012
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@15987 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'object.c')
-rw-r--r--object.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/object.c b/object.c
index cd21f4e..c67381d 100644
--- a/object.c
+++ b/object.c
@@ -1205,6 +1205,34 @@ sym_to_sym(sym)
return sym;
}
+static VALUE
+sym_call(args, mid)
+ VALUE args, mid;
+{
+ VALUE obj;
+
+ if (RARRAY_LEN(args) < 1) {
+ rb_raise(rb_eArgError, "no receiver given");
+ }
+ obj = rb_ary_shift(args);
+ return rb_apply(obj, (ID)mid, args);
+}
+
+/*
+ * call-seq:
+ * sym.to_proc
+ *
+ * Returns a _Proc_ object which respond to the given method by _sym_.
+ *
+ * (1..3).collect(&:to_s) #=> ["1", "2", "3"]
+ */
+
+static VALUE
+sym_to_proc(VALUE sym)
+{
+ return rb_proc_new(sym_call, (VALUE)SYM2ID(sym));
+}
+
/***********************************************************************
*
@@ -2749,6 +2777,7 @@ Init_Object()
rb_define_method(rb_cSymbol, "to_s", sym_to_s, 0);
rb_define_method(rb_cSymbol, "id2name", sym_to_s, 0);
rb_define_method(rb_cSymbol, "to_sym", sym_to_sym, 0);
+ rb_define_method(rb_cSymbol, "to_proc", sym_to_proc, 0);
rb_define_method(rb_cSymbol, "===", rb_obj_equal, 1);
rb_define_method(rb_cModule, "freeze", rb_mod_freeze, 0);