* numeric.c (int_to_f, fix_to_f): rename fix_to_f to int_to_f, and add

  treatment for subclasses which don't have definitions of to_f method.

* numeric.c (Integer#to_f, Fixnum#to_f): move to_f method from Fixnum
  to Integer.

* ext/-test-/integer/my_integer.rb: define helper class for testing
  to_f method for a subclass of Integer.

* ext/-test-/integer/extconf.rb: ditto.

* ext/-test-/integer/init.c: ditto.

* test/-ext-/integer/test_my_integer.rb: examine to_f method for a
  subclass of Integer.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54179 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 26 insertions, 0 deletions

diff --git a/test/-ext-/integer/test_my_integer.rb b/test/-ext-/integer/test_my_integer.rb
new file mode 100644
index 0000000000..bc4757f463
--- /dev/null
+++ b/test/-ext-/integer/test_my_integer.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: false
+require 'test/unit'
+require "-test-/integer"
+
+class TestIntegerExt < Test::Unit::TestCase
+  def test_my_integer_to_f
+    assert_raise(TypeError) do
+      Bug::Integer::MyInteger.new.to_f
+    end
+
+    begin
+      Bug::Integer::MyInteger.class_eval do
+        def to_f
+        end
+      end
+
+      assert_nothing_raised do
+        Bug::Integer::MyInteger.new.to_f
+      end
+    ensure
+      Bug::Integer::MyInteger.class_eval do
+        remove_method :to_f
+      end
+    end
+  end
+end