0.036		2014-01-04	T. R. Wyant
  Retract the "Allow non-ASCII white space under /x" change introduced
    in version 0.033. I misread perl5170delta, and implemented early.
  Change tp explicit character class to recognize white space under /x.
    I was previously using \s, which matched too much.
  Thanks to Nobuo Kumagai for finding and reporting this.

0.035		2013-11-15	T. R. Wyant
  Properly handle multi-character modifiers like /ee. We now handle /eie
    as being the same as /eei. Thanks to Anonymous Monk for finding
    this.
  Properly handle \g and \k back references that do not correspond to an
    actual capture group. They are now reblessed into the unknown token,
    and counted as errors. Thanks to Anonymous Monk for finding this.
  Add method error() to PPIx::Regexp::Element. This should return an
    error message when the element is in error -- normally when it has
    been blessed into the unknown token or structure.
  Add method modifier_asserted() to PPIx::Regexp::Element. This walks
    the parse tree backward to determine if the given modifier is in
    effect for the element.

0.034		2013-05-11	T. R. Wyant
  No changes since 0.033_01

0.033_01	2013-05-05	T. R. Wyant
  Correct spelling and grammar errors in POD and comments. RT #85050.
    Thanks David Steinbrunner for catching these.

0.033		2013-02-22	T. R. Wyant
  Allow interpolation in regex sets. It implies Perl 5.17.9 or higher.
  Allow non-ASCII white space under /x. It implies Perl 5.17.9 or
    higher.

0.032		2013-02-06	T. R. Wyant
  Fix problems with Regex Set functionality under Perl 5.6.2. CPAN
    testers RULE!

0.031		2013-01-31	T. R. Wyant
  Have PPIx::Regexp::Token::Code (and offspring) become
    PPIx::Regexp::Token::Unknown inside a regex set.

0.030		2013-01-22	T. R. Wyant
  Add Regex Sets, which were added to Perl as an experimental feature in
    5.17.8. This is experimental in Perl, therefore the parse may
    change.
  Ditch PPIx::Regexp::Token::GroupType method __expect_after_match() in
    favor of the more general __match_setup(). This is done without
    deprecation because __expect_after_match() was documeted as
    package-private, but noted in the change log because it _was_
    documented.

0.029		2013-01-14	T. R. Wyant
  No changes from 0.028_02.

0.028_02	2012-12-31	T. R. Wyant
  Add method unescaped_content() to PPIx::Regexp::Element().
  Rewrite the tokenizing code in PPIx::Regexp::Token::GroupType and
    offspring to use regular expressions specific to the regexp
    delimiter, and escaping only that delimiter. Thanks again to
    Alexandr Ciornii for finding more of these.

0.028_01	2012-12-20	T. R. Wyant
  Fix mis-parse of /(\?|I)/ as a branch reset (it's really an
    alternation). There may be more of these lurking. Thanks to Alexandr
    Ciornii for finding this one.
  Add options -files and -objectify to eg/predump.

0.028		2012-06-06	T. R. Wyant
  Replace all uses of YAML::Any with YAML, since they come in the same
    distro, and YAML does not suffer from deprecation warnings.

0.027		2012-05-28	T. R. Wyant
  Eliminate unescaped literal "{" characters in regexps in
    PPIx::Regexp::Token::Backreference and
    PPIx::Regexp::Token::CharClass::Simple. These are deprecated in 5.17.0.

0.026		2012-02-24	T. R. Wyant
  Add support for \F (fold case), added in 5.15.8.

0.025		2012-01-04	T. R. Wyant
  Tolerate leading and trailing white space around the regular
    expression.  These are still round-trip safe, since the white space
    is tokenized.
  Make Changes file conform to CPAN::Changes, and add
    xt/author/changes.t to ensure continued compliance.

0.024		2011-12-17	T. R. Wyant
  Reinstate author test xt/author/manifest.t, which was clobbered
    shortly before the release of 0.021_10.

0.023		2011-12-08	T. R. Wyant
  Correct address of FSF in the version of the GPL distributed in
    LICENSES/Copying. Thanks to Petr Pisar for picking this up.

0.022		2011-11-24	T. R. Wyant
  Correct various documentation errors.
  The default-modifier functionality is no longer considered
    experimental.
  No code changes since 0.021_11.

0.021_11	2011-11-15	T. R. Wyant
  Don't initialize effective modifiers with '^', since that wrongly
    asserts that /d has been seen somewhere along the line.
  Implement negation of match-semantic modifiers (e.g. 'no re /u;') by
    setting the relevant datum to undef.
  THE DEFAULT-MODIFIER FUNCTIONALITY IS EXPERIMENTAL, AND MAY BE CHANGED
    WITHOUT NOTICE until the next production release.

0.021_10	2011-11-14	T. R. Wyant
  Support for default modifiers. This includes:
    * default_modifiers argument to new() in PPIx::Regexp,
      PPIx::Regexp::Tokenizer, and PPIx::Regexp::Dumper
    * Public method modifier_asserted() on PPIx::Regexp, to return
      whether a given modifier is actually in effect. The results of the
      modifier() method are unchanged.
    THIS FUNCTIONALITY IS EXPERIMENTAL, AND MAY BE CHANGED OR REVOKED
    WITHOUT WARNING.
  Require Test::More 0.88 for installation. Eliminate all the 'eval
    { require ... }' logic in favor of 'use Test::More 0.88'.
  Have Makefile.PL make use of {BUILD_REQUIRES} if it is available.
  Fix PPIx::Regexp::Token::Whitespace->can_be_quantified() to return
    false.

0.021		2011-07-22	T. R. Wyant
  Modified tokenizer to correctly handle a back slash used as a
    delimiter. I believe.
  PPIx::Regexp::Dumper now dumps the results of ppi() if that method is
    present and -verbose is asserted.

0.020		2011-04-02	T. R. Wyant
  Corrected perl_version_introduced():
    \R is now 5.009005 (was 5.000).

0.019		2011-03-01	T. R. Wyant
  Various corrections to perl_version_introduced():
    \X is now 5.006 (was 5.000);
    \N{name} is now 5.006001 (was 5.006);
    \N{U+xxxx} is now 5.008 (was 5.006).
  The \C is now parsed as a PPIx::Regexp::Token::CharClass::Simple. It
    was previously considered a PPIx::Regexp::Token::Literal.
  Ensure that \N{$foo} parses as a Unicode literal, not a quantified \N.
    The ordinal() method returns undef for this.
  Understand the /aa modifier, introduced with 5.13.10.
  Report perl_version_introduced() of 5.013010 for the new semantic
    modifiers when modifying the entire expression.
  Correct handling of interpolations like ${^foo} and $#{foo}.

0.018		2011-02-16	T. R. Wyant
  No changes (other than version) since 0.017_02.

0.017_02	2011-01-31	T. R. Wyant
  Override ppi() in PPIx::Regexp::Token::Interpolation to provide the
    proper PPI when variable names are bracketed.
  Properly parse bracketed variable names (I hope!), which may not be
    subscripted.

0.017_01	2011-01-28	T. R. Wyant
  Take account of possible '$' or '@' casts before a symbol in an
    interpolation (e.g. $$foo{bar}, which is equivalent to $foo->{bar}).

0.017		2011-01-26	T. R. Wyant
  Add the /a modifier to PPI::Regexp::Token::Modifiers, legal only in
    the (?:...) construction. This was introduced in Perl 5.13.9.
  When parsing an interpolation from a replacement string (rather than a
    regular expression), take subscripts at face value rather than
    trying to disambiguate them from quantifiers and character classes,
    which they can't be in this context.

0.016		2011-01-05	T. R. Wyant
  The PPIx::Regexp::Token::Code perl_version_introduced() method now
    returns the minimum Perl version (currently set to 5.000) if it is
    used to represent the substitution portion of s///e.
  Update copyright to 2011.

0.015		2010-10-25	T. R. Wyant
  Documented intent to revoke support for features introduced in a
    development Perl which do not make it to a production release. This
    is necessary because in this case the syntax could be reused with
    different semantics.
  Added support for Perl 5.13.6 (?^...) construction.
  Added support for Perl 5.13.6 d, l, and u modifiers.
  Fixed inconsistency in perl_version_introduced() results between
    PPIx::Regexp::Token::Modifier and
    PPIx::Regexp::Token::GroupType::Modifier.
  Corrected PPIx::Regexp::Constant RE_CAPTURE_NAME docs, somehow missed
    back at 0.010_01.

0.014		2010-10-14	T. R. Wyant
  Recognize \o{...} as a PPIx::Regexp::Token::Literal, with
    perl_version_introduced() of 5.0013003.
  Terminate \0.. through \7.. after three characters, as Perl does.
    These two were brought to my attention by Brian D.  Foy's "The
    Effective Perler" for October 11 2010,
    http://www.effectiveperlprogramming.com/blog/697
  Correct the PPIx::Regexp::Token::Literal ordinal() method for '\b'. As
    a literal, this is a back space.

0.013		2010-10-10	T. R. Wyant
  Declare a parse failure if characters are found between the '}' and
    the ')' of (?{...}) and (??{...}), and rebless the tokens to
    ::Unknown. Perl does not accept anything here, so I think I should
    not either.
  Whitespace tweak in the PPIx::Regexp::Dumper test output for the
    failures test.
  Replace the PPI logic in PPIx::Regexp::Token::Code with a call to
    $tokenizer->find_matching_delimiter(). This is actually the way Perl
    works, as a look at toke.c and regcomp.c makes clear.
  Push the perl_version_introduced() back to 5.0 at the request of
    Alexandr Ciornii, for the potential benefit of Perl::MinimumVersion.
    This was done mostly by reading the various perlre, perldelta, and
    perlop documents, so these should be taken with a HUGE grain of
    salt.

0.012		2010-09-26	T. R. Wyant
  Track all the features reported as introduced (or removed) in Perl
    5.010 back to Perl 5.009005, and report them as such.
  Report modifier /r as having been introduced in Perl 5.013002, rather
    than the default of 5.006.

0.011		2010-09-16	T. R. Wyant
  No changes from 0.010_01.

0.010_01	2010-09-11	T. R. Wyant
  Remove dependencies on Params::Util and Readonly. The latter was
    requested by ADAMK for the benefit of Padre. It involved changing
    the symbols exported from PPIx::Regexp::Constant, but these were
    documented as private, so ...
  Parse POSIX character classes [=a=] and [.a.] as
    PPIx::Regexp::Token::CharClass::POSIX::Unknown, which counts as a
    parse failure since these are not supported by Perl.
  Make the PPI::Document created by PPIx::Regexp::Token::Code->ppi() be
    read only. This means we need PPI 1.116. Cache the document, and
    ensure the cached result is returned on subsequent calls.

0.010		2010-08-06	T. R. Wyant
  Fix fatal error in PPIx::Regexp::Token::Code->ppi().
  Move author tests from xt/ to xt/author/.

0.009		2010-08-03	T. R. Wyant
  Recognize s/.../.../ee as being different from s/.../.../e. In
    particular, the replacement portion of the former is _not_ a Perl
    expression: it's an interpolatble string, which later gets
    eval{}'ed.

0.008		2010-07-01	T. R. Wyant
  Promote methods can_be_quantified() and is_quantifier() from
    PPIx::Regexp::Token to PPIx::Regexp::Element, so all classes inherit
    them. They still return true and false respectively.
  Override can_be_quantified() to return false on PPIx::Regexp,
    PPIx::Regexp::Structure::Quantifier,
    PPIx::Regexp::Structure::Regexp, and
    PPIx::Regexp::Structure::Replacement.
  Override is_quantifier() to return true on
    PPIx::Regexp::Structure::Quantifier.
  Modify PPIx::Regexp::Dumper to be able to display can_be_quantified
    and is_quantifier for PPIx::Regexp::Node objects when dumping
    verbosely.
  Convert internal data to Readonly in PPIx::Regexp::Lexer,
    PPIx::Regexp::Token::CharClass::Simple,
    PPIx::Regexp::Token::Structure, and PPIx::Regexp::Tokenizer.
  Remove leftover boilerplate in PPIx::Regexp::Token::CharClass::Simple.

0.007_01	2010-06-28	T. R. Wyant
  Explicitly require a minimum Perl of 5.006.
  Centralized dependencies in inc/PPIx/Regexp/Meta.pm.
  Removed claim that PPIx::Regexp is alpha code. Docs still say that the
    interface can be changed, but now it will go through a deprecation
    cycle.

0.007		2010-04-28	T. R. Wyant
  PPIx::Regexp::Lexer no longer fails when encountering expressions like
    m{)}. Instead, it marks the right parenthesis as an unmatched
    delimiter.

0.006_01	2010-04-23	T. R. Wyant
  Fixed RT 56864 - PPIx::Regexp::Lexer fails in Perl::Critic under Perl
    5.13.0. This was due to the value of a returned $+[0] getting
    transmogrified before the caller saw it. I never did isolate what
    triggered the bug.
  You can now get a tokenizer trace by setting environment value
    PPIX_REGEXP_TOKENIZER_TRACE to a non-zero numeric value. This is
    unsupported, though.

0.006		2010-02-26	T. R. Wyant
  Update copyright from 2009 to 2009-2010.
  Parse \N{...} in accordance with perl5115delta. The curlys must
    contain an alpha followed by alphanumerics, spaces, parens, colons,
    or dashes. \N{ without a matching } is a character class (if legal)
    followed by a literal '{'.
  Parse \N inside a character class as PPI::Regexp::Token::Unknown,
    since Perl 5.11.5 considers this a compile error. A \N{...} inside a
    character class is still OK.
  Add method match() to PPIx::Regexp::Tokenizer. This is analogous to
    capture(), but returns the entire matched string.

0.005		2009-12-26	T. R. Wyant
  Recognize \N (without curlys), back-ported from Perl 6 into 5.11.
  Recognize unicode characters as \N{[[:alpha:]] ... rather than
    \N{[\w\s:] ... This is per the 5.11 documentation, but I think Perl
    always worked this way.
  Recognize loose matching of Unicode character classes, and allow '='
    in lieu of a single ':' in a Unicode character class (this from Perl
    5.11.3).
  PPIx::Regexp::Dumper now produces the proper output when called with
    perl_version => 1, test => 1.
  Describe the typical content of the object in the documentation for
    PPIx::Regexp::Structure::NamedCapture and
    PPIx::Regexp::Token::GroupType::NamedCapture.

0.004		2009-11-09	T. R. Wyant
  Have PPIx::Regexp::Token::Literal correctly recognize when
    charnames::vianame() is unavailable, and decouple this from the
    handling of \N{U+hhhh}.
  Add dependency on Task::Weaken, since depending on Scalar::Util
    appears not to cut it.
  Correct the assignment of the license type in Makefile.PL.

0.003		2009-11-05	T. R. Wyant
  Have PPIx::Regexp::Token::Literal recognize \N{U+hhhh} (where hhhh
    represents hex digits), and provide its ordinal (hhhh). Remove
    recognition of \N. (. = any character), which Perl does not do.
  Fix $re->flush_cache() so that it actually removes $re and only
    $re from the cache.
  Add delimiters() method to PPIx::Regexp::Main and PPIx::Regexp.
    Support this in eg/prenav.
  Increase test coverage and remove dead code.
  Count tests in t/parse.t and t/unit.t

0.002		2009-10-28	T. R. Wyant
  In verbose mode, have PPIx::Regexp::Dumper dump the absolute capture
    number referred to by a numbered reference.
  Have eg/preslurp pass its -verbose option to PPIx::Regexp::Dumper
  Don't use Test::More::isa_ok for the t/basic.t class heritage tests,
    since some versions of Test::More require a reference for the first
    argument of isa_ok().

0.001		2009-10-21	T. R. Wyant
  Initial release.
