1 files changed, 21 insertions, 0 deletions
diff --git a/poppler-glib/src/layers_iter.hg b/poppler-glib/src/layers_iter.hg
index 64df78f..bc44be0 100644
--- a/poppler-glib/src/layers_iter.hg
+++ b/poppler-glib/src/layers_iter.hg
@@ -48,6 +48,27 @@ class LayersIter
      * @endcode
      */
     inline operator BoolExpr() const { return gobj() ? GINT_TO_POINTER(1) : 0; }
+
+  private:
+    /** Relational operators are deleted to prevent invalid conversion
+     * to const void*.
+     */
+    bool operator<(const LayersIter& src) const;
+
+    /// See operator<().
+    bool operator<=(const LayersIter& src) const;
+
+    /// See operator<().
+    bool operator>(const LayersIter& src) const;
+
+    /// See operator<().
+    bool operator>=(const LayersIter& src) const;
+
+    /// See operator<().
+    bool operator==(const LayersIter& src) const;
+
+    /// See operator<().
+    bool operator!=(const LayersIter& src) const;
 };
 
 } // namespace Poppler