From c30686ebce24245faa5a2c531bb195dc79063790 Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Wed, 5 Apr 2023 16:04:28 +0200
Subject: [PATCH] Fix logic to remove trailing zeros

---
 include/boost/charconv/to_chars.hpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/include/boost/charconv/to_chars.hpp b/include/boost/charconv/to_chars.hpp
index a0f34d8..c5820c9 100644
--- a/include/boost/charconv/to_chars.hpp
+++ b/include/boost/charconv/to_chars.hpp
@@ -565,10 +565,14 @@ to_chars_result to_chars_hex(char* first, char* last, Real value, int precision)
             {
                 break;
             }
-            else if (remaining_bits == 0 && precision != -1) // Do not print trailing zeros with unspecified precision
+            else if (remaining_bits == 0)
             {
-                std::memset(first, '0', static_cast<std::size_t>(real_precision));
-                first += real_precision;
+                // Do not print trailing zeros with unspecified precision
+                if (precision != -1)
+                {
+                    std::memset(first, '0', static_cast<std::size_t>(real_precision));
+                    first += real_precision;
+                }
                 break;
             }