fixed sparql parser bug with pnames followed by a dot

Previously, bugs would occur when triple-patterne did not have
whitespace between a pname and the terminating dot:

?s ?p foaf:knows.

would parse into a uriref of "http://xmlns.com/foaf/0.1/knows."

The optional clause of the PN_LOCAL production was in the wrong place,
fixing it was non-trivial, since pyparsing cannot backtrack.

I replaced the whole production with a regex, parsing pnames should now
also be much faster (not that it matters greatly)

Thanks to balkian on irc for spotting!

2 files changed, 19 insertions, 4 deletions

diff --git a/test/DAWG/rdflib/manifest.ttl b/test/DAWG/rdflib/manifest.ttl
index dcefceed..63b884ad 100644
--- a/test/DAWG/rdflib/manifest.ttl
+++ b/test/DAWG/rdflib/manifest.ttl
@@ -10,10 +10,11 @@
 <> a mf:Manifest ;
 	rdfs:label "RDFLib Extra SPARQL tests" ;
     mf:entries
-    ( 
-	:unicode 
-	:nestedbnode 
-	) . 
+    (
+	:unicode
+	:nestedbnode
+    :whitespacedot
+	) .
 
 
 :opt-subquery rdf:type mf:QueryEvaluationTest ;
@@ -45,3 +46,10 @@
          [ qt:query  <nestedbnode.rq> ] ;
     mf:result  <nestedbnode.srx>
     .
+
+:whitespacedot rdf:type mf:PositiveSyntaxTest11 ;
+    mf:name "Dot without whitespace after triple-pattern";
+    dawgt:approval dawgt:Approved ;
+    dawgt:approvedBy <http://gromgull.net/me> ;
+    mf:action <whitespacedot.rq>
+    .
diff --git a/test/DAWG/rdflib/whitespacedot.rq b/test/DAWG/rdflib/whitespacedot.rq
new file mode 100644
index 00000000..f6552ca6
--- /dev/null
+++ b/test/DAWG/rdflib/whitespacedot.rq
@@ -0,0 +1,7 @@
+prefix : <urn:p:>
+select * where {
+ ?s ?p ?o.
+ ?s ?p "".
+ ?s ?p <urn:a>.
+ ?s ?p :a.
+}