1 files changed, 12 insertions, 0 deletions
diff --git a/utility.h b/utility.h
index c829b85..fd6917e 100644
--- a/utility.h
+++ b/utility.h
@@ -62,6 +62,18 @@ namespace flask
                 is_valid(s, i+1, f);
         }
 
+        constexpr bool is_equ_p(const char* a, const char* b, unsigned n)
+        {
+            return
+                *a == 0 || *b == 0
+                    ? false :
+                n == 0
+                    ? true :
+                *a != *b
+                    ? false :
+                is_equ_p(a+1, b+1, n-1);
+        }
+
         constexpr bool is_equ_n(const_str a, unsigned ai, const_str b, unsigned bi, unsigned n)
         {
             return