ruby-changes:25459
From: marcandre <ko1@a...>
Date: Wed, 7 Nov 2012 02:14:55 +0900 (JST)
Subject: [ruby-changes:25459] marcandRe: r37516 (trunk): * range.c: Support for Range#size and Range#each.size
marcandre 2012-11-07 02:14:46 +0900 (Wed, 07 Nov 2012) New Revision: 37516 http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=37516 Log: * range.c: Support for Range#size and Range#each.size [Feature #6636] Modified files: trunk/range.c trunk/test/ruby/test_range.rb Index: range.c =================================================================== --- range.c (revision 37515) +++ range.c (revision 37516) @@ -458,6 +458,25 @@ /* * call-seq: + * rng.size -> num + * + * Returns the number of elements in the range. + * + * (10..20).size #=> 11 + */ + +static VALUE +range_size(VALUE range) +{ + VALUE b = RANGE_BEG(range), e = RANGE_END(range); + if (rb_obj_is_kind_of(b, rb_cNumeric) && rb_obj_is_kind_of(e, rb_cNumeric)) { + return num_interval_step_size(b, e, INT2FIX(1), EXCL(range)); + } + return Qnil; +} + +/* + * call-seq: * rng.each {| i | block } -> rng * rng.each -> an_enumerator * @@ -482,7 +501,7 @@ { VALUE beg, end; - RETURN_ENUMERATOR(range, 0, 0); + RETURN_SIZED_ENUMERATOR(range, 0, 0, range_size); beg = RANGE_BEG(range); end = RANGE_END(range); @@ -1076,6 +1095,7 @@ rb_define_method(rb_cRange, "last", range_last, -1); rb_define_method(rb_cRange, "min", range_min, 0); rb_define_method(rb_cRange, "max", range_max, 0); + rb_define_method(rb_cRange, "size", range_size, 0); rb_define_method(rb_cRange, "to_s", range_to_s, 0); rb_define_method(rb_cRange, "inspect", range_inspect, 0); Index: test/ruby/test_range.rb =================================================================== --- test/ruby/test_range.rb (revision 37515) +++ test/ruby/test_range.rb (revision 37516) @@ -347,4 +347,12 @@ assert !x.eql?(z) } end + + def test_size + assert_equal 42, (1..42).size + assert_equal 41, (1...42).size + assert_equal 6, (1...6.3).size + assert_equal 5, (1.1...6).size + assert_equal 42, (1..42).each.size + end end -- ML: ruby-changes@q... Info: http://www.atdot.net/~ko1/quickml/