* Use a proper namespace.

* Optimise header file usage a bit.
* Compile the parser as C++.

src/libexpr/attr-path.cc

@@ -1,5 +1,9 @@
 #include "attr-path.hh"
 #include "nixexpr-ast.hh"
+#include "util.hh"
+
+
+namespace nix {
 
 
 bool isAttrs(EvalState & state, Expr e, ATermMap & attrs)
@@ -73,3 +77,6 @@ Expr findAlongAttrPath(EvalState & state, const string & attrPath,
     
     return e;
 }
+
+ 
+}