[v3] update <regex> to N3225 draft

[Jonathan Wakely <jwakely dot gcc at gmail dot com>]

This updates sub_match and match_results to the latest C++0x draft and
makes some other fixes.

A fix for PR 47724 is still to come ...

2011-02-14  Jonathan Wakely  <jwakely.gcc@gmail.com>

	* include/bits/regex.h (sub_match::sub_match): Add.
	(match_results::ready): Add.
	(match_results::empty): Adjust.
	(match_results::length): Add missing dereference.
	(match_results::operator[],prefix,suffix): Add debug mode checks.
	(match_results::cend): Re-use end().
	(match_results::format): Adjust signatures.
	(operator==(match_results,match_results)): Implement.
	* include/bits/regex_compiler.h (_Scanner_base): Use constexpr.
	* include/bits/regex_constants.h (syntax_option_type): Likewise.
	* include/bits/regex_grep_matcher.h: Fix comment typo.
	(_Specialized_results::_Specialized_results): Simplify.
	* include/bits/regex_cursor.h: Fix comment typo.
	* include/bits/regex_nfa.h: Likewise.
	* testsuite/28_regex/basic_regex/ctors/basic/string_range_01_02_03.cc:
	Fix error code, remove xfail.
	* testsuite/28_regex/basic_regex/ctors/extended/
	string_range_01_02_03.cc: Likewise.

tested x86_64-linux, committed to trunk

Attachment: re-n3225.txt
Description: Text document