Initial Push

- Sample test  (test not compiling)
- Stubs not generating

Author: felickz

go/ql/lib/semmle/go/frameworks/XPath.qll

@@ -142,6 +142,21 @@ module XPath {
       }
     }
 
+    /**
+     * An XPath expression string used in an API function of the
+     * [lestrrat-go/libxml2](https://github.com/lestrrat-go/libxml2) package.
+     */
+    private class LestratGoLibxml2XPathExpressionString extends Range {
+      LestratGoLibxml2XPathExpressionString() {
+        exists(Function f, string name | name.matches("Parse%") |
+          f.hasQualifiedName("github.com/lestrrat-go/libxml2/parser.Parser", name) and
+          //f.hasQualifiedName(package("github.com/lestrrat-go/libxml2/parser.Parser", ""), name) and
+          this = f.getACall().getArgument(0)
+        )
+      }
+    }
+
+
     /**
      * An XPath expression string used in an API function of the
      * [xpathparser](https://github.com/santhosh-tekuri/xpathparser) package.