.

wcfs/internal/_wcfs.pyx

@@ -24,11 +24,13 @@
 # XXX doc
 
 from libcpp cimport nullptr_t, nullptr as nil
+from libcpp.string cimport string
 cdef extern from *:
     ctypedef bint cbool "bool"
 
 cdef extern from "wcfs_misc.h" nogil:
     cppclass error:
+        string Error()                  const
         cbool operator==(nullptr_t)     const
         cbool operator!=(nullptr_t)     const
         cbool operator==(const error&)  const
@@ -48,7 +50,7 @@ cdef class PyWatchLink:
         with nogil:
             err = wlink_close_pyexc(pywlink.wlink)
         if err != nil:
-            raise RuntimeError(err)     # XXX exc class?
+            raise RuntimeError(err.Error())     # XXX exc class?
 
 
 

wcfs/internal/wcfs_misc.h

@@ -50,15 +50,18 @@ using std::vector;
 const nullptr_t nil = nullptr;
 
 // error mimics error from Go.
-struct error {
-    string err;	// XXX -> private + ,error() ?
+class error {
+    string _err;
+
+public:
+    string Error() const;
 
     error()             {}
     error(nullptr_t)    {}  //  = nil
 
     // == nil
     bool operator==(nullptr_t) const {
-        return err.empty();
+        return _err.empty();
     }
     bool operator!=(nullptr_t) const {
         return !(*this==NULL);
@@ -66,7 +69,7 @@ struct error {
 
     // == error
     bool operator==(const error &rhs) const {
-        return (err == rhs.err);
+        return (_err == rhs._err);
     }
     bool operator!=(const error &rhs) const {
         return !(*this==rhs);