From 621b50e57a3b22ae386a4b715faa7102683d0439 Mon Sep 17 00:00:00 2001
From: alandefreitas <alandefreitas@gmail.com>
Date: Wed, 7 Feb 2024 11:27:27 -0300
Subject: [PATCH] refactor: no implicit char conversions

fix #816
---
 include/boost/url/detail/encode.hpp     | 3 ++-
 include/boost/url/grammar/lut_chars.hpp | 8 ++++++++
 test/unit/test_rule.hpp                 | 2 +-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/include/boost/url/detail/encode.hpp b/include/boost/url/detail/encode.hpp
index a0fc5d00c..90445b749 100644
--- a/include/boost/url/detail/encode.hpp
+++ b/include/boost/url/detail/encode.hpp
@@ -115,8 +115,9 @@ re_encode_unsafe(
         detail::hexdigs[opt.lower_case];
     auto const encode = [end, hex](
         char*& dest,
-        unsigned char c) noexcept
+        char c0) noexcept
     {
+        auto c = static_cast<unsigned char>(c0);
         ignore_unused(end);
         *dest++ = '%';
         BOOST_ASSERT(dest != end);
diff --git a/include/boost/url/grammar/lut_chars.hpp b/include/boost/url/grammar/lut_chars.hpp
index 0454a8a99..d160880e6 100644
--- a/include/boost/url/grammar/lut_chars.hpp
+++ b/include/boost/url/grammar/lut_chars.hpp
@@ -257,6 +257,14 @@ class lut_chars
     bool
     operator()(
         unsigned char ch) const noexcept
+    {
+        return operator()(static_cast<char>(ch));
+    }
+
+    /// @copydoc operator()(unsigned char) const
+    constexpr
+    bool
+    operator()(char ch) const noexcept
     {
         return mask_[lo(ch)] & hi(ch);
     }
diff --git a/test/unit/test_rule.hpp b/test/unit/test_rule.hpp
index 5fcf76eaf..e15ff29f4 100644
--- a/test/unit/test_rule.hpp
+++ b/test/unit/test_rule.hpp
@@ -60,7 +60,7 @@ test_char_set(
     for_each_char(
     [&cs](char c)
     {
-        if(cs(0) || ! cs(c))
+        if(cs(static_cast<unsigned char>(0)) || ! cs(c))
         {
             if(cs(c))
             {