diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | NEWS | 4 | ||||
| -rw-r--r-- | object.c | 29 | ||||
| -rw-r--r-- | test/ruby/test_symbol.rb | 4 |
4 files changed, 42 insertions, 0 deletions
@@ -1,3 +1,8 @@ +Sun Apr 13 15:55:52 2008 Kazuhiro NISHIYAMA <zn@mbf.nifty.com> + + * object.c (sym_to_proc): new method Symbol#to_proc; backported + from 1.9. bug#19012 + Fri Apr 11 19:14:30 2008 Kazuhiro NISHIYAMA <zn@mbf.nifty.com> * object.c (rb_obj_tap): new method Object#tap; backported from @@ -71,6 +71,10 @@ with all sufficient information, see the ChangeLog file. New exception class that causes Kernel#loop to stop iteration when raised. + * Symbol#to_proc + + New method. + * enumerator * Enumerator is now a built-in module. The #next and #rewind @@ -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); diff --git a/test/ruby/test_symbol.rb b/test/ruby/test_symbol.rb index 2ccfe64c92..f53e615766 100644 --- a/test/ruby/test_symbol.rb +++ b/test/ruby/test_symbol.rb @@ -74,4 +74,8 @@ class TestSymbol < Test::Unit::TestCase assert_inspect_evaled(':$0') assert_inspect_evaled(':$1') end + + def test_to_proc + assert_equal %w(1 2 3), (1..3).map(&:to_s) + end end |