Boost.Regex History

Boost 1.33.0.

• Completely rewritten expression parsing code, and traits class support; now conforms to the standardization proposal.
• Breaking Change: The syntax options that can be passed to basic_regex constructors have been rationalized.  The default option (perl) now has a value of zero, and it is now clearly documented which options apply to which regular expression syntax styles (perl, POSIX-extended, POSIX-basic etc).  Some of the more esoteric options have now been removed, so there is the possibility that existing code may fail to compile: however equivalent functionality should still be available.
• Breaking Change: POSIX-extended and POSIX-basic regular expressions now enforce the letter of the POSIX standard much more closely than before.
• Added support for (?imsx-imsx) constructs.
• Added support for lookbehind expressions (?<=positive-lookbehind) and (?<!negative-lookbehind).
• Added support for conditional expressions (?(assertion)true-expresion|false-expression).
• Added MFC/ATL string wrappers.
• Added Unicode support; based on ICU.
• Changed newline support to recognise \f as a line separator (all character types), and \x85 as a line separator for wide characters / Unicode only.
• Added a new format flag format_literal that treats the replace string as a literal, rather than a Perl or Sed style format string.
• Errors are now reported by throwing exceptions of type regex_error. The types used previously - bad_expression and bad_pattern - are now just typedefs for regex_error. Type regex_error has a couple of new members: code() to report an error code rather than a string, and position() to report where in the expression the error occured.

Boost 1.32.1.

• Fixed bug in partial matches of bounded repeats of '.'.

Boost 1.31.0.

• Completely rewritten pattern matching code - it is now up to 10 times faster than before.
• Reorganized documentation.
• Deprecated all interfaces that are not part of the regular expression standardization proposal.
• Added regex_iterator and regex_token_iterator .
• Added support for Perl style independent sub-expressions.
• Added non-member operators to the sub_match class, so that you can compare sub_match's with strings, or add them to a string to produce a new string.
• Added experimental support for extended capture information.
• Changed the match flags so that they are a distinct type (not an integer), if you try to pass the match flags as an integer rather than match_flag_type to the regex algorithms then you will now get a compiler error.

Revised  28 June 2004 

© Copyright John Maddock 1998- 2004

Use, modification and distribution are subject to 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)