* range.c (range_each): should honor to_str conversion.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24571 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Tue Aug 18 01:21:31 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* range.c (range_each): should honor to_str conversion.
+
 Mon Aug 17 23:45:40 2009  Tadayoshi Funaba  <tadf@dotrb.org>
 
 	* lib/date/delta.rb: removed require 'date'.  added to_c.

range.c

@@ -436,19 +436,23 @@ range_each(VALUE range)
 	    rb_yield(LONG2FIX(i));
 	}
     }
-    else if (TYPE(beg) == T_STRING) {
-	VALUE args[2];
-
-	args[0] = end;
-	args[1] = EXCL(range) ? Qtrue : Qfalse;
-	rb_block_call(beg, rb_intern("upto"), 2, args, rb_yield, 0);
-    }
     else {
-	if (!rb_respond_to(beg, id_succ)) {
-	    rb_raise(rb_eTypeError, "can't iterate from %s",
-		     rb_obj_classname(beg));
+	VALUE tmp = rb_check_string_type(beg);
+
+	if (!NIL_P(tmp)) {
+	    VALUE args[2];
+
+	    args[0] = end;
+	    args[1] = EXCL(range) ? Qtrue : Qfalse;
+	    rb_block_call(tmp, rb_intern("upto"), 2, args, rb_yield, 0);
+	}
+	else {
+	    if (!rb_respond_to(beg, id_succ)) {
+		rb_raise(rb_eTypeError, "can't iterate from %s",
+			 rb_obj_classname(beg));
+	    }
+	    range_each_func(range, each_i, NULL);
 	}
-	range_each_func(range, each_i, NULL);
     }
     return range;
 }

test/ruby/test_range.rb

@@ -1,4 +1,5 @@
 require 'test/unit'
+require 'delegate'
 
 class TestRange < Test::Unit::TestCase
   def test_range_string
@@ -13,6 +14,8 @@ class TestRange < Test::Unit::TestCase
     assert_equal(["6", "7", "8"], ("6".."8").to_a, "[ruby-talk:343187]")
     assert_equal(["6", "7"], ("6"..."8").to_a)
     assert_equal(["9", "10"], ("9".."10").to_a)
+    assert_equal(["9", "10"], (SimpleDelegator.new("9").."10").to_a)
+    assert_equal(["9", "10"], ("9"..SimpleDelegator.new("10")).to_a)
   end
 
   def test_evaluation_order