1 files changed, 13 insertions, 0 deletions
diff --git a/src/libutil/types.hh b/src/libutil/types.hh
index 55d02bcf9..9c85fef62 100644
--- a/src/libutil/types.hh
+++ b/src/libutil/types.hh
@@ -4,6 +4,7 @@
 
 #include <list>
 #include <set>
+#include <string>
 #include <map>
 #include <vector>
 
@@ -33,4 +34,16 @@ struct OnStartup
     OnStartup(T && t) { t(); }
 };
 
+/* Wrap bools to prevent string literals (i.e. 'char *') from being
+   cast to a bool in Attr. */
+template<typename T>
+struct Explicit {
+    T t;
+
+    bool operator ==(const Explicit<T> & other) const
+    {
+        return t == other.t;
+    }
+};
+
 }