XML output: avoid warnings with scoped enum values in anonymous names…

…paces.

When a C++11 `enum class` was present in an anonymous namespace (usually
in *.cpp files), the XML output was emitting warnings similar to the
following:

   Internal inconsistency: member False does not belong to any container!

And the XML output was rendering bogus IDs for enum values starting with
`dummy_`, such as:

    dummy_1a96ab6574751fdf6a53ceec8a3896c45daf8320b26d30ab433c5a54546d21f414c

The fix is to call memberOutputFileBase() on the enumeration itself and
not on the enum value, that way it provides correct file base that
corresponds to file base of the enumeration. There's also a new test
that checks this.

Note: this assumes that enum values belong to the same compound as enums
themselves. In my experience that was always the case and there's no
broken test after this change, so I hope I didn't break anything.

src/xmlgen.cpp

@@ -954,11 +954,11 @@ static void generateXMLForMember(MemberDef *md,FTextStream &ti,FTextStream &t,De
       MemberDef *emd;
       for (emli.toFirst();(emd=emli.current());++emli)
       {
-        ti << "    <member refid=\"" << memberOutputFileBase(emd) 
-           << "_1" << emd->anchor() << "\" kind=\"enumvalue\"><name>" 
+        ti << "    <member refid=\"" << memberOutputFileBase(md)
+           << "_1" << emd->anchor() << "\" kind=\"enumvalue\"><name>"
            << convertToXML(emd->name()) << "</name></member>" << endl;
 
-        t << "        <enumvalue id=\"" << memberOutputFileBase(emd) << "_1" 
+        t << "        <enumvalue id=\"" << memberOutputFileBase(md) << "_1"
           << emd->anchor() << "\" prot=\"";
         switch (emd->protection())
         {

testing/071/namespace_a_namespace_1_1_0D0.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<doxygen xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="compound.xsd" version="">
+  <compounddef id="namespace_a_namespace_1_1_0D0" kind="namespace" language="C++">
+    <compoundname>ANamespace::@0</compoundname>
+      <sectiondef kind="enum">
+      <memberdef kind="enum" id="071__enum__in__anon__ns_8cpp_1a96ab6574751fdf6a53ceec8a3896c45d" prot="public" static="no" strong="yes">
+        <type/>
+        <name>Boolean</name>
+        <enumvalue id="071__enum__in__anon__ns_8cpp_1a96ab6574751fdf6a53ceec8a3896c45daf8320b26d30ab433c5a54546d21f414c" prot="public">
+          <name>False</name>
+          <briefdescription>
+          </briefdescription>
+          <detaileddescription>
+          </detaileddescription>
+        </enumvalue>
+        <enumvalue id="071__enum__in__anon__ns_8cpp_1a96ab6574751fdf6a53ceec8a3896c45daf827cf462f62848df37c5e1e94a4da74" prot="public">
+          <name>True</name>
+          <briefdescription>
+          </briefdescription>
+          <detaileddescription>
+          </detaileddescription>
+        </enumvalue>
+        <enumvalue id="071__enum__in__anon__ns_8cpp_1a96ab6574751fdf6a53ceec8a3896c45da2767828026039e8ba7b38973cbb701f2" prot="public">
+          <name>FileNotFound</name>
+          <briefdescription>
+          </briefdescription>
+          <detaileddescription>
+          </detaileddescription>
+        </enumvalue>
+        <briefdescription>
+        </briefdescription>
+        <detaileddescription>
+        </detaileddescription>
+        <inbodydescription>
+        </inbodydescription>
+        <location file="071_enum_in_anon_ns.cpp" line="6" column="1" bodyfile="071_enum_in_anon_ns.cpp" bodystart="6" bodyend="10"/>
+      </memberdef>
+      </sectiondef>
+    <briefdescription>
+    </briefdescription>
+    <detaileddescription>
+    </detaileddescription>
+    <location file="071_enum_in_anon_ns.cpp" line="4" column="1"/>
+  </compounddef>
+</doxygen>

testing/071_enum_in_anon_ns.cpp

@@ -0,0 +1,12 @@
+// objective: test that enum values in anonymous namespaces produce no warning
+// check: namespace_a_namespace_1_1_0D0.xml
+
+namespace ANamespace { namespace {
+
+enum class Boolean {
+    False,
+    True,
+    FileNotFound
+};
+
+}}