rexml: Fix XPath bug of //#{ELEMENT_NAME}[#{POSITION}]

The position should be counted for each nodeset but the previous
implementation counts position for union-ed nodeset.

For example, "/a/*/*[1]" should be matched to "<c1/>" and "<c2/>" with
the following XML.

    <a>
      <b>
        <c1/>
      </b>
      <b>
        <c2/>
      </b>
    </a>

But the previous implementation just returns only "<c1/>".

* lib/rexml/element.rb (REXML::Attributes#each_attribute):
  Support Enumerator for no block use.

* lib/rexml/element.rb (REXML::Attributes#each):
  Support Enumerator for no block use.

* lib/rexml/functions.rb (REXML::Functions.string):
  Support NaN again.

* lib/rexml/xpath_parser.rb: Re-implement "Step" evaluator.
  It should evaluate "AxisSpecifier", "NodeTest" and "Predicate" in one
  step to respect position for each nodeset.

* test/rexml/test_jaxen.rb: Enable more tests. Remained tests should
  be also enabled but it'll not be near future.

* test/rexml/xpath/test_base.rb: Fix expected value.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63237 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 5 deletions

diff --git a/lib/rexml/functions.rb b/lib/rexml/functions.rb
index b0029660fa..452426703c 100644
--- a/lib/rexml/functions.rb
+++ b/lib/rexml/functions.rb
@@ -154,12 +154,16 @@ module REXML
         case object
         when Array
           string(object[0])
-        when Numeric
-          integer = object.to_i
-          if object == integer
-            "%d" % integer
+        when Float
+          if object.nan?
+            "NaN"
           else
-            object.to_s
+            integer = object.to_i
+            if object == integer
+              "%d" % integer
+            else
+              object.to_s
+            end
           end
         when nil
           ""