From 23a9a647c7094b6a37a02ddcea7e52ccbd6aa0c6 Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Sun, 28 Apr 2024 14:44:08 -0400
Subject: [PATCH] xo-flatstring: replace from_int() with template on int repr

---
 include/xo/flatstring/flatstring.hpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/xo/flatstring/flatstring.hpp b/include/xo/flatstring/flatstring.hpp
index 9057f51c..60828f7e 100644
--- a/include/xo/flatstring/flatstring.hpp
+++ b/include/xo/flatstring/flatstring.hpp
@@ -189,8 +189,14 @@ namespace xo {
         }
 
         /** @brief construct from integer **/
-        static constexpr flatstring from_int(int x) {
-            constexpr size_t buf_z = 20;
+        template <typename Int>
+        requires std::is_integral_v<Int>
+        static constexpr flatstring from_int(Int x) {
+            /*  32-bit int ~ 4e9
+             *  64-bit int ~ 16e18
+             * 128-bit int - 256e36 ~ 2.6e38
+             */
+            constexpr size_t buf_z = 64;
 
             bool negative_flag = (x < 0);
             std::size_t i = buf_z;