From 6b5c92b5e08d8d0765beebbd327f3436db1572bc Mon Sep 17 00:00:00 2001
From: Gennaro Prota <gennaro.prota@gmail.com>
Date: Wed, 29 Jul 2026 14:23:03 +0200
Subject: [PATCH] Include <cwchar> unconditionally in wchar_from_mb

The iterator uses `std::mbstate_t` and `std::mbsinit` directly, yet the
include of `<cwchar>` was guarded by `BOOST_NO_CWCHAR`. That guard was
misleading: when `BOOST_NO_CWCHAR` was defined the header was skipped
but the code below still used those symbols, so the file could not
compile in that configuration anyway. Therefore, include the header
unconditionally.

Closes #196.
---
 include/boost/archive/iterators/wchar_from_mb.hpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/include/boost/archive/iterators/wchar_from_mb.hpp b/include/boost/archive/iterators/wchar_from_mb.hpp
index 19e1120fc..294351b48 100644
--- a/include/boost/archive/iterators/wchar_from_mb.hpp
+++ b/include/boost/archive/iterators/wchar_from_mb.hpp
@@ -18,9 +18,7 @@
 
 #include <cctype>
 #include <cstddef> // size_t
-#ifndef BOOST_NO_CWCHAR
 #include <cwchar>  // mbstate_t
-#endif
 #include <algorithm> // copy
 
 #include <boost/config.hpp>