proc.c: Support any callable when composing Procs

* proc.c (proc_compose): support any object with a call method rather
  than supporting only procs. [Feature #6284]

* proc.c (compose): use the function call on the given object rather
  than rb_proc_call_with_block in order to support any object.

* test/ruby/test_proc.rb: Add test cases for composing Procs with
  callable objects.

* test/ruby/test_method.rb: Add test cases for composing Methods with
  callable objects.

From: Paul Mucur <paul@altmetric.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65913 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 3 deletions

diff --git a/test/ruby/test_proc.rb b/test/ruby/test_proc.rb
index 7ea4556e8a..f70345ed74 100644
--- a/test/ruby/test_proc.rb
+++ b/test/ruby/test_proc.rb
@@ -1460,11 +1460,22 @@ class TestProc < Test::Unit::TestCase
     assert_equal(6, h.call(2))
   end
 
-  def test_compose_with_nonproc_or_method
+  def test_compose_with_callable
     f = proc {|x| x * 2}
+    c = Class.new {
+      def call(x) x + 1 end
+    }
+    g = f * c.new
+
+    assert_equal(6, g.call(2))
+  end
+
+  def test_compose_with_noncallable
+    f = proc {|x| x * 2}
+    g = f * 5
 
-    assert_raise(TypeError) {
-      f * 5
+    assert_raise(NoMethodError) {
+      g.call(2)
     }
   end
 end