id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
13231	u32regex_replace()  for  std::u32string  (UTF-32) won't compile	robic@…	John Maddock	"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 ) )
	{
		// ...
	}
}}}

"	Bugs	new	To Be Determined	regex	Boost 1.64.0	Showstopper