update boost

linx64/include/boost/multiprecision/detail/string_helpers.hpp

@@ -0,0 +1,48 @@
+///////////////////////////////////////////////////////////////////////////////
+//  Copyright 2023 John Maddock.
+//  Copyright Christopher Kormanyos 2013. Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_MP_DETAIL_STRING_HELPERS_HPP
+#define BOOST_MP_DETAIL_STRING_HELPERS_HPP
+
+#include <algorithm>
+#include <cstring>
+
+namespace boost { namespace multiprecision { namespace detail {
+
+   struct is_in_string
+   {
+      const char* begin;
+      const char* end;
+      is_in_string(const char* p) : begin(p), end(p + std::strlen(p)) {}
+
+      bool operator()(char s) { return std::find(begin, end, s) != end; }
+   };
+
+   struct is_not_in_string
+   {
+      const char* begin;
+      const char* end;
+      is_not_in_string(const char* p) : begin(p), end(p + std::strlen(p)) {}
+
+      bool operator()(char s) { return std::find(begin, end, s) == end; }
+   };
+
+   template <class Iterator>
+   std::size_t find_first_of(Iterator begin, Iterator end, const char* what)
+   {
+      return std::find_if(begin, end, is_in_string(what)) - begin;
+   }
+   template <class Iterator>
+   std::size_t find_first_not_of(Iterator begin, Iterator end, const char* what)
+   {
+      return std::find_if(begin, end, is_not_in_string(what)) - begin;
+   }
+
+
+}}} // namespace boost::multiprecision::detail
+
+#endif // BOOST_MP_DETAIL_STRING_HELPERS_HPP