From e7a2c18481942d16b48c19bb58847501e4fdf103 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Tue, 4 Jul 2023 11:20:44 +1000
Subject: [PATCH] string: use static operator() for simple transform equality
 functors

---
 string.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/string.hpp b/string.hpp
index d6dc8ee6..ca93f3f5 100644
--- a/string.hpp
+++ b/string.hpp
@@ -401,10 +401,10 @@ namespace cruft::string::equality {
     /// \tparam TransformV   A character transform function
     template <char (*TransformV)(char) noexcept>
     struct transform {
-        bool operator() (
+        static bool operator() (
             std::string_view const &a,
             std::string_view const &b
-        ) const noexcept {
+        ) noexcept {
             if (a.size () != b.size ())
                 return false;