Ignore constants discovered in passing

When RDoc parses a class body it will create new modules for newly
discovered constant namespaces.

When the constant isn't assigned-to the namespaces are now marked as
ignored which prevents them from appearing in the coverage report.

Bug #209

Author: drbrain

History.rdoc

@@ -35,6 +35,8 @@
     Bug #214 by Ryan Davis.
   * Fixed documented? check for classes which indicated incorrect 100%
     coverage.  Bug #211 by Ryan Davis.
+  * RDoc ignores constants discovered in passing in class and method bodies.
+    Bug #209 by Ryan Davis.
 
 === 4.0.1 / 2013-03-27
 

lib/rdoc/parser/ruby.rb

@@ -674,6 +674,7 @@ def parse_class container, single, tk, comment
   # true, no found constants will be added to RDoc.
 
   def parse_constant container, tk, comment, ignore_constants = false
+    prev_container = container
     offset  = tk.seek
     line_no = tk.line_no
 
@@ -696,6 +697,11 @@ def parse_constant container, tk, comment, ignore_constants = false
     end
 
     unless TkASSIGN === eq_tk then
+      while container and container != prev_container do
+        container.ignore
+        container = container.parent
+      end
+
       unget_tk eq_tk
       return false
     end

test/test_rdoc_parser_ruby.rb

@@ -684,7 +684,7 @@ class Foo
     assert_equal 2, foo.method_list.length
   end
 
-  def test_parse_const_fail_w_meta
+  def test_parse_const_fail_w_meta_method
     util_parser <<-CLASS
 class ConstFailMeta
   ##
@@ -706,6 +706,27 @@ class ConstFailMeta
     assert_equal 1, const_fail_meta.attributes.length
   end
 
+  def test_parse_const_third_party
+    util_parser <<-CLASS
+class A
+  true if B::C
+  true if D::E::F
+end
+    CLASS
+
+    tk = @parser.get_tk
+
+    @parser.parse_class @top_level, RDoc::Parser::Ruby::NORMAL, tk, @comment
+
+    a = @top_level.classes.first
+    assert_equal 'A', a.full_name
+
+    visible = @store.all_modules.reject { |mod| mod.ignored? }
+    visible = visible.map { |mod| mod.full_name }
+
+    assert_empty visible
+  end
+
   def test_parse_class_nested_superclass
     foo = @top_level.add_module RDoc::NormalModule, 'Foo'