From 7adef4f42555ce8e5e63b29acab03d1170cfdab0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ion=20Gazta=C3=B1aga?= <igaztanaga@gmail.com>
Date: Sat, 24 Jan 2026 17:11:34 +0100
Subject: [PATCH] Use SFINAE to avoid calling iterator-range functions when
 trying to call size + value constructors

---
 include/boost/container/string.hpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/boost/container/string.hpp b/include/boost/container/string.hpp
index d8707ca..1f9c796 100644
--- a/include/boost/container/string.hpp
+++ b/include/boost/container/string.hpp
@@ -885,7 +885,10 @@ class basic_string
    //! <b>Effects</b>: Constructs a basic_string with a default-constructed allocator,
    //!   and a range of iterators.
    template <class InputIterator>
-   basic_string(InputIterator f, InputIterator l)
+   basic_string(InputIterator f, InputIterator l
+      BOOST_CONTAINER_DOCIGN(BOOST_MOVE_I typename dtl::disable_if_c
+         < dtl::is_convertible<InputIterator BOOST_MOVE_I size_type>::value
+         BOOST_MOVE_I dtl::nat >::type * = 0))
       : base_t()
    {
       this->priv_terminate_string();
@@ -895,7 +898,10 @@ class basic_string
    //! <b>Effects</b>: Constructs a basic_string taking the allocator as parameter,
    //!   and a range of iterators.
    template <class InputIterator>
-   basic_string(InputIterator f, InputIterator l, const allocator_type& a)
+   basic_string(InputIterator f, InputIterator l, const allocator_type& a
+      BOOST_CONTAINER_DOCIGN(BOOST_MOVE_I typename dtl::disable_if_c
+         < dtl::is_convertible<InputIterator BOOST_MOVE_I size_type>::value
+         BOOST_MOVE_I dtl::nat >::type * = 0))
       : base_t(a)
    {
       this->priv_terminate_string();