[Boost-bugs] [Boost C++ Libraries] #13231: u32regex_replace() for std::u32string (UTF-32) won't compile

Subject: [Boost-bugs] [Boost C++ Libraries] #13231: u32regex_replace() for std::u32string (UTF-32) won't compile
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-09-27 23:24:52

#13231: u32regex_replace()  for  std::u32string  (UTF-32) won't compile
------------------------------+---------------------
 Reporter:  robic@…           |      Owner:  (none)
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  None
  Version:  Boost 1.64.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+---------------------
 Note - This pertains to input UTF-32 strings.

 Compiler: VS2015 , VC++
 Boost version: 1.64

 The u32regex_search() works fine and as expected

 =================================

 Problem description: Intellisence  detects proper input\\  parameters
 using the u32string parameter, but throws many\\
 errors when compiling.

 The errors start with\\

  >boost_1_64_0\boost/functional/hash/extensions.hpp(262): error C2664:
 'size_t boost::hash_value(std::type_index)': cannot convert argument 1
 from 'const char32_t' to 'std::type_index'\\

 and end with\\

 >  RxReplace.cpp(9255): note: see reference to function template
 instantiation
 'std::basic_string<char32_t,std::char_traits<char32_t>,std::allocator<char32_t>>
 boost::u32regex_replace<char32_t>(const
 std::basic_string<char32_t,std::char_traits<char32_t>,std::allocator<char32_t>>
 &,const boost::u32regex &,const
 std::basic_string<char32_t,std::char_traits<char32_t>,std::allocator<char32_t>>
 &,boost::regex_constants::match_flag_type)' being compiled

 with about 20 errors in between. \\

 I hope this is just a problem with extensions.hpp\\
 and maybe there is a quick fix (or it has already been fixed).\\
 I desperately need this to work with  ''std::u32string''  types\\
 as UnicodeString just won't cut it for my purposes.

 ''From the documentation:\\
 u32regex_replace\\
 \\
 For each regex_replace algorithm defined by\\
 <boost/regex.hpp>, then <boost/regex/icu.hpp> defines an
 overloaded algorithm that takes the same arguments, but
 which is called u32regex_replace, and which will accept
 UTF-8, UTF-16 or UTF-32 encoded data, as well as an ICU
 UnicodeString as input.
 ''

 The code below reproduces the compile errors

 {{{
         // rxconst.h
         // ==============================

         typedef std::u32string   X_32string;
         typedef std::wstring     X_string;
         typedef boost::u32regex  U_X_regex;
         typedef boost::u32match  X_u32match;
         typedef std::u32string::const_iterator U32SITR;

         #define U_MAKEREGEX(str,options) make_u32regex(str,options)
         #define U_REGEX_SEARCH boost::u32regex_search
         #define U_REGEX_REPLACE boost::u32regex_replace

         // RxReplace.cpp ( won't compile )
         // ==============================
         #include "rxconst.h";

         U_X_regex uRx = U_MAKEREGEX( _T("[trgt]+"), regex_constants::perl
 );
         X_32string sTarget, sFmt, sOutput;
         WstrToU32string( X_string(_T("target")), sTarget );
         WstrToU32string( X_string(_T("")), sFmt );

         sOutput =  U_REGEX_REPLACE( sTarget, uRx, sFmt );       // <--
 Won't compile

         // RxSearch.cpp ( compiles and runs as expected )
         // ==============================
         #include "rxconst.h";

         U_X_regex uRx = U_MAKEREGEX( _T("[abce]+"), regex_constants::perl
 );
         X_32string sSrc;
         WstrToU32string( X_string(_T("source")), sSrc );
         U32SITR SitrStart = sSrc.begin();
         U32SITR start = SitrStart;
         U32SITR end   = sSrc.end();

         X_u32match _M;

         while ( U_REGEX_SEARCH( start, end, _M, uRx, Flags, SitrStart ) )
         {
                 // ...
         }
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac10/boost/ticket/13231>
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