Revision history for Parse-RecDescent
1.00 Mon Aug 11 13:17:13 1997
- original version
1.01 Mon Sep 8 18:04:14 EST 1997
- changed "quotemeta" to "quotemeta $_" in Text::Balanced
to workaround bug in Perl 5.002 and 5.003
1.10 Tue Sep 30 14:51:49 EST 1997
- fixed fatal bug in tracing code
- added m<delim>...<delim> format for regex tokens
- added support for trailing modifiers (/.../gimsox) in regex tokens
- added $thisline variable
1.20 Thu Oct 2 11:46:57 EST 1997
- fixed handling of trailing regex modifiers (now no whitespace allowed
before between last delimiter and first modifier)
- added trace diagnostic for failure/success of actions
(demystifies failures caused by an action returning undef)
- added context for "Matched rule..." trace
- added a test so that an integer value (N>1) in the
$::RD_TRACE variable now truncates (to N characters) all
contexts reported in any trace
- added "start-up" actions: actions appearing before the first rule
were previously an error. They are now executed (once) at
the start of the parser's namespace.
1.21 Sat Oct 4 17:12:23 EST 1997
- modified truncation of context in trace diagnostics (successful
matches now report first N/2 and last N/2 chars, instead of first N)
- fixed incorrect version number in Balanced.pm
1.22 Tue Oct 7 11:53:27 EST 1997
- fixed lurking trace problem with certain pathological regexes
- fixed bug in generation of special namespaces (this was serious
as it prevented the use of more than one alternation in a parser,
as well as preventing the use of more than one parser in a script!
1.23 Fri Oct 17 10:15:22 EST 1997
- fixed error message generation for <error?:msg> directives
- fixed error message handling of empty productions
- fixed handling of multi-line start-up actions
- removed spurious debugging message for implicit subrule generation
- changed naming scheme for alternations (pseudo-rule's name now
describes location of alternation exactly)
- added support for repetition specifiers on alternations.
- Text::Balanced::extract_.... altered to honour the context in
which they are called (see Balanced.pod for details).
1.24
- fixed minor problem in tracing code (context string now correctly
reported for actions)
- added explicit namespace declaration at beginning of generated
code, to ensure that any "start code" is declared in the
appropriate namespace.
- fixed left recursion check on empty productions
- added $::RD_AUTOSTUB flag and associated autostubbing behaviour
(see new section - "Autostubbing" - in RecDescent.pod)
- eliminated hierarchical precedence between $::RD_HINT and
$::RD_TRACE. Enabling tracing now does _not_ automatically
turn on hinting (although error and warning messages are
still automatically enabled).
- fixed bug in Text::Balanced. Division now correctly handled
in code blocks.
1.25 Mon Feb 09 12:19:14 EST 1998
- Resynchronized numbering schemes for RecDescent and Balanced.
1.26 Wed Feb 25 13:52:15 EST 1998
- Fixed bug (and inefficiency) in <resync:pattern> directive.
- Improved checking of regexes within grammars
- Added subrule arguments (major change to internal grammar parser)
- Added <matchrule:...> directive
- started work on Compile() option (not complete yet - do not use!)
- Made generated code "use strict"
- Fixed bug which incorrectly warned against items
following a <error?> directive.
- Improved $thisline (added assignment and resync)
- Fixed expectation messages for subrules
- Rearranged tar file to co-operate with CPAN.pm
1.30 Fri May 22 05:52:06 1998
- Added <rulevar> directive
- Added culling of productions starting with <reject> or <rulevar>
- Cleaned up and improved format (and speed) of tracing code
- Added warning levels
- Optimized generation of token separator checking code.
- Fixed bug encountered when parsing a literal string
- Added $::RD_AUTOACTION to simplify standard actions at the
end of each production
1.31 Fri May 22 06:11:26 1998
- Fixed bug in naming archive file
1.33 Fri May 22 06:15:26 1998
1.35 Wed Jun 24 09:57:02 1998
- Removed "foreach my $var ( @list )" constructs,
which were biting users with perl 5.003 and earlier.
- Fixed bug calling &Parse::RecDescent::toksepcode
instead of &Parse::RecDescent::Rule::toksepcode
- Changed grammar so that colons in rule definitions
must appear on the same line as the rule name
(as documented). Added an explicit error message
when this is not the case.
- Added $thiscolumn, which indicates the current
column at any point in the parse.
- Added $thisoffset, which indicates the absolute
position in the original text string at any
point in the parse.
- Added $prevline and $prevcolumn, which indicate
line and column of the last char of the last
successfully matched item.
- Added @itempos which provides:
$itempos[$n]{offset}{from}
$itempos[$n]{offset}{to}
$itempos[$n]{line}{from}
$itempos[$n]{line}{to}
$itempos[$n]{column}{from}
$itempos[$n]{column}{to}
corresponding to each $item[$n].
See new documentation.
- Several trivial lexical changes to make xemacs happy
1.41 Mon Aug 10 14:52:53 1998
- Enhanced POD in response to user feedback
- Fixed subtle bug in Text::Balanced::extract_codeblock.
It only bit when '(?)' appeared in implicit subrules
- Added ability to pass args to the start-rule.
1.42 ????
- Added a test.pl
- Modified behaviour of repetitions, so that the results
of repeated subrules which succeed but don't consume are
preserved (at least up to the minimal number of repetitions)
- Fixed bug: @itempos now not incorrectly reset if grammar
contained alternations
- Fixed bug: Embedded unmatched '}' in regex tokens now works
correctly
- Miscellaneous tweaks to RecDescent.pod (e.g. updated meta-grammar)
1.43 Sat Aug 15 06:43:46 1998
- Resychronized Balanced.pm versions
1.50 Thu Aug 27 09:29:31 1998
- Changed <rulevar:...> parser to use extract_codeblock, so as to
handle embedded '>' chars (e.g. <rulevar: $tmp = $self->{tmp}> )
- Added <defer:...> to allow deferred actions which are
only executed if they are part of a rule that eventually succeeds.
(see the new section under "Directives" in RecDescent.pod)
- Fixed matching interpolated literals (was broken when literal
contained pattern metacharacters)
1.51 Thu Aug 27 16:25:08 1998
- Maintenance release, rectifying bad soft links in the 1.50
distributions
1.60 Wed Oct 21 09:44:15 1998
[Never released]
1.61 Wed Oct 21 11:06:19 1998
- Added <token:...> directive for supporting (future) token-stream
parsing (see pod)
- Added feature that data is consumed if passed as a reference
(see pod)
- Fixed bug in autogenerated errors: now ignores directives
- Modified behaviour of <defer> directive so that deferred
actions only executed if total parse succeeds (i.e. returns
a defined value)
- Made error messages "anti-deferred". That is, only those
errors invoked in paths that eventually caused a parse
to fail are printed - see documentation.
- Miscellaneous fixes for Text::Balanced subroutines
- Made private namespaces inherit Parse::RecDescent namespace
(leads to more intuitive behaviour when calling methods
of $thisparser)
- *** NON-BACKWARDS COMPATIBLE CHANGE! ***
Changed the behaviour of token separator specification.
Now uses <skip:...> directive. See pod for new details.
1.62 Wed Dec 9 11:26:29 1998
- Reinstated missing $prevoffset variable
- Corrected a possible bug with autoactions (thanks Mitchell)
- *** IMPORTANT CHANGE ***
$::RD_WARN now initialized 3 by default. Serious but
non-fatal errors are automatically reported, unless you
explicitly undefine $::RD_WARN.
- Fixed bug in AUTOLOADing non-method subs defined in
package Parse::RecDescent (thanks Mario)
1.63 Thu Mar 25 09:13:21 1999
- Rewrote documentation to replace the concept of a
token separator with that of a token prefix.
- Fixed obscure bug in replacement of rules containing
implicit subrules (alternations). Thanks Craig.
1.64 Sun Mar 28 05:44:14 1999
- Synchronized with Text::Balanced version
- Fixed obscure bug in the treatment of escaped backslashes
in literal tokens. Thanks Matthew.
1.65 Wed May 19 12:35:05 1999
- Added <leftop:...> and <rightop:...> directives
- Added level 2 warning and autoreject for lone <error?>
directive in a production.
1.66 Fri Jul 2 13:35:06 1999
- Improved error message when an action fails to parse
(Thanks Tuomas).
- Allowed predefined subroutines in package Parse::RecDescent
to be used as rules in grammars
- Changed error report on bad regexes to level 3 warning, since
compile-time interpolation failure may falsely invalidate
regexes that would work at run-time.
1.70 Fri Oct 8 14:15:36 1999
- Clarified use of "eofile" idiom in POD file
Clarified meaning of "free-form" in description of grammars
Fixed <resync> examples, which were invalidated by
earlier change in semantics of <error>. (Thanks Knut).
- Added grammar precompiler (see documentation)
- Tweaked message for <reject> optimization.
- Fixed bug when using '@' as a terminal (thanks Abigail)
- Fixed nasty bug when $return set to zero
- Added <score> and <autoscore> directives (see documentation)
1.77 Mon Nov 22 06:11:32 1999
- IMPORTANT: Now requires 5.005 or better.
- Added <perl_quotelike>, <perl_codeblock>, and <perl_variable>
directives (see documentation)
- Added <autotree> directive (see documentation)
- Added %item hash (see documentation - thanks Stef!)
- Tweaked internal parser in line with changes to Text::Balanced
- Added <nocheck> directive to switch off recursion checking and
other checks in stable grammars (see documentation).
- Refined code generation WRT positional variables ($thisoffset, etc)
- Added positional entries for %item (see documentation)
- Fixed bug with (missing) start actions under precompiler (thanks Theo)
1.78 Mon Mar 20 12:03:17 2000
- Fixed error messages and documentation for
Parse::RecDescent::Precompile (thanks Jim)
- Moved demos to /demo subdirectory
- Added tutorial in /tutorial subdirectory
- Added <autotree> directive
- Added (s /sep/) notation (thanks Greg)
- Circumvented \G and /gc calamities
- Added more comprehensible error message when parser invoked
through non-existent startrule (thanks Jeff)
- Fixed serious bug with creating new parsers after existing
ones had failed. (Thanks Paul)
- Fixed problem with nested implicit subrules (thanks Marc).
1.79 Mon Aug 21 11:27:39 2000
- Pod tweak (thanks Abigail)
- Documented need to use do{..} within some <reject:...>
directives (thanks Paul)
- Added Save method
- Fixed bug that was preventing precompiled parsers being
subsequently extended (thanks Jeff).
- Changed keys used by %item. Now uses "named positionals"
rather that simple positionals for non-subrule items
(see documentation)
- Added trimmer for surrounding whitespace in matchrules.
- Squelched bug in (not) handling invalid directives (thanks John)
1.80 Sat Jan 20 05:02:35 2001
- Fixed Save so that saved parsers can still be used after saving
(thanks Supun)
- Fixed bug in line number tracking (thanks Theo)
- Fixed bug in (s /pat/) shorthand (thanks Julien)
- Improved docs on <rulevar> (thanks Steve)
1.90 Tue Mar 25 01:17:38 2003
- BACKWARDS INCOMPATIBLE CHANGE: The key of an %item entry for
a repeated subrule now includes the repetition specifier.
For example, in:
sentence: subject verb word(s)
the various matched items will be stored in $item{'subject'},
$item{'verb'}, and $item{'word(s)'} (i.e. *not* in $item{'word'},
as it would have been in previous versions of the module).
(thanks Anthony)
- Changed argument passing behaviour. If no arguments specified
for subrule, it is now passed current rule's @arg instead. To
get old (no arguments) behaviour use: subrule[]
- Fixed bug in <reject> handling: failed to reject if $return
had been set. (thanks Nick)
- Added two useful demos of restructuring nested data (thanks Marc)
- Fixed doc bug re use of // (thanks Randal)
- Localized filehandles, like a good citizen should
- Misc doc bug fixes (thanks all)
- Fixed Text::Balance dependency in Makefile.PL (thanks Dominique)
- Fixed bug that @itempos wasn't set up if referred to only in
an autoaction. (thanks Eric)
- Fixed truncation bug in tracing contexts
- Dramatically improved speed of line counting (thanks John)
- Made item(s) and item(s /,/) behave consistently wrt %item
(thanks Marcel)
- Added prototype <autorule:...> handling
- Added outer block markers for <perl_codeblock>
- Fixed multi-grammar precompilation (thanks Dominique)
- Fixed numerous snafus in tutorial.html (thanks Ralph)
- Added nesting level information to traces
- Fixed resetting of $text after an <uncommit> rule.
1.91 Fri Mar 28 23:20:28 2003
- Updated Text::Balanced to fix various bugs
1.92 Wed Apr 2 04:45:37 2003
- Removed Text::Balanced from distribution (now a prereq only)
1.93 Wed Apr 2 22:25:14 2003
- Fixed fatal error with $tracelevel (thanks everyone)
1.94 Wed Apr 9 08:29:33 2003
- Replaced 'our' with 'use vars' to reinstate 5.005 compatibility.
1.95.1 Sun Sep 30 05:06:56 2007
- Updated README to reflect new status of Text::Balanced
(i.e. required but not included in the distribution)
- Fixed demo_logic (Thanks, Steve)
- Fixed autopropagation of arguments into repetitions (Thanks, Luke)
- Limited context info to 500 chars in traces (Thanks, Stephen)
- Added option to select base namespace for autotreeing (thanks Gaal)
- Improved formatting compatibility with 5.9.0 (thanks, David)
- Added support for $::RD_HINT = 0 to turn off hinting entirely
- Fixed bug in line handling
- Returned $return variable to documented behaviour
(i.e. setting return doesn't guarantee the match, only what is
returned if the match succeeds)
- Fixed nit in debugging of conditional regexes (thanks, Brian)
- Moved expectation creation to compile-time (thanks François)
- Removed redundant inheritances (i.e. @ISA elements)
in internal namespace (thanks Hugo)
- Added warning against C<return> in actions to "GOTCHAS" documentation
- Added demo_another_Cgrammar.pl (thanks Hendrik)
- Documented parens (thanks Robin)
- Removed incorrect meta-grammar from docs
1.96.0 Fri Oct 3 06:08:24 2008
- Propagated correct Changes file (thanks Matthew!)
- Added: <warn> <hint> <trace_build> <trace_parse> <nocheck>
-
1.962.0 Tue Aug 25 19:45:15 2009
- Doc bug fix (thanks Christophe)
- Fixed assymmetrical push/pop on @lines tracker (thanks Peter!)
- Bumped sub-version number hugely to fix CPAN indexing (thanks Jerome)
- Remove all occurrences of $& so we don't affect other regular expressions.
- Perl 5.6.0 required for use of $+[0] and $-[0] for replacement of $&.
1.962.1 Thu Aug 27 21:39:30 2009
- Fixed subtle bug in leftop and rightop caused by removal of $&
1.963 Thu Jan 21 09:13:19 2010
- Fixed even subtler bug in leftop and rightop caused by removal of $&
(Thanks Francesco)
1.964 Wed Feb 17 09:33:39 2010
- Fixed bug with undefined $1 when parsing literals (thanks Dan!)
- Fixed premature namespace destruction bug with compiled grammars
1.964001 Tue Feb 23 15:15:18 2010
- Updated version number because versioning is a neverending
nightmare in Perl 5 (thanks Matt)
1.965001 Sun Apr 4 15:00:10 2010
- Removed all references to /opts version of perl interpreter
- Added Parse::RecDescent::redirect_reporting_to()
to enable ERROR, TRACE, and TRACECONTEXT filehandles to be
easily redirected.
1.966_000 Mon Jun 27 08:32:50 2011
- Patched unnamed subrules, so that they actual fail when
not correctly specified (thanks Evgeniy!)
- Added skip tests (thanks Flavio)
- Added doc patch to make $skip semantics clearer (thanks Flavio!)
- Fixed POD description of <rightop:...> semantics (thanks Dirk!)
1.966_001 Mon Nov 14 10:34:52 2011
- Applied fix to restore skipped prefixes on match failure
(thanks Jeremy!)
- *** NON-BACKWARDS COMPATIBLE CHANGE! *** Removed formats to
eliminate problems with filehandle duplication in forked
environments. Removed redirect_reporting_to() in favor of using
STDERR for all error/trace output.
1.966_002 Sun Jan 22 19:08:37 2012
- *** NON-BACKWARDS COMPATIBLE CHANGE! *** Change the caches for
$prevline and $thisline to be local to the parser, rather than
lexical vars in Parse::RecDescent. This prevents previously
generated parsers from interfering with the line counts of
later parsers.
- removed trailing whitespace from all member files (cosmetic)
- new tests, updated MANIFEST
- Added Jeremy Braun as an author and current maintainer
- update file permissions
- fixed a few broken links in the pod
1.967001 Sat Jan 28 20:54:48 2012
- Addressed RT.cpan.org #28314: regex modifiers for tokens not
honored during regex syntax check. (Thanks SADAHIRO!)
- Fixed some POD typos
- Added message on how to turn off "default" hint value in the
default hint value ($::RD_HINT = 0). RT.cpan.org # #4898.
- Modified _write_ERROR to call formline twice to avoid repeated
$errorprefix.
- Collected match tracing messages into a common function which
takes into account positive/negative lookahead.
- Addressed RT.cpan.org #74258: RD_AUTOSTUB does not work with
precompiled parsers. (Thanks Yuri!)
- Special-case $::RD_AUTOSTUB eq 1. $::RD_AUTOSTUB's value is
ignored, and the unknown subrule 'rule' has a production
"rule: 'rule'", rather than "rule: '1'".
- Change Parse::RecDescent::new to call $self->Replace with only
the grammar as an argument. That prevents the $compiling
argument to new() from being incorrectly interpreted as
$isimplicit.
1.967002 Sun Jan 29 19:13:04 2012
- Addressed RT.cpan.org #29966: regex with single backslash not
recognized. Changed the definition of $TOKEN to handle
backslashes inside of regex patterns.
- Skip tests in t/reentry.t if Test::Warn isn't available.
1.967003 Mon Jan 30 07:24:53 2012
- Remove the 'use 5.10' from t/skip_dynamic.t, it runs fine
against Perl 5.8.9. (Thanks Slaven!)
1.967_004 Tue Feb 7 22:11:11 2012
- Localize the OUT filehandle during Precompile.
- Document the <autotree:Base::Class> form of the <autotree>
directive.
- Provide a simple test for the <autotree> directive,
t/autotree.t. Renamed basics.t to ensure it runs before
autotree.t.
- Allow a global <skip:> directive that functions the same as
modifying $Parse::RecDescent::skip prior to compiling a
grammar. (Thanks Flavio!)
- Require that the $file returned by caller() be eq '-', rather than merely
starting with '-'. This allows execution of the following. (Thanks Christopher)
perl -MParse::RecDescent -e 'print "$Parse::RecDescent::VERSION\n";'
- Warn on empty productions followed by other productions. The
empty production always matches, so following productions will
never be reached.
- *** NON-BACKWARDS COMPATIBLE CHANGE! *** A repetition directive
such as 'id(s /,/)' correctly creates a temporary @item variable
to hold the 'id's that are matched. That @item variable is them
used to set the real $item[] entry for that repetition. The
same treatment is now given to %item. Formerly, in a production like:
id ',' id(s /,/)
matched against:
xxx, yyy, zzz
The $item{id} entry which should be 'xxx' is overwritten by
'yyy' and then 'zzz' prior to the action being executed. Now
'yyy' and 'zzz' set $item{id}, but in the private %item, which
goes out of scope once the repetition match completes.
- ** EXPERIMENTAL ** When precompiling, optionally create a
standalone parser by including most of the contents of
Parse::RecDescent in the resulting Precompiled output.
- Accept an optional $options hashref to Precompile, which can
be used to specify $options->{-standalone}, which currently
defaults to false.
- The subroutines import, Precompile and Save are not included
in the Precompile'd parser.
- The included Parse::RecDescent module is renamed to
Parse::RecDescent::_Runtime to avoid namespace conflicts with
an installed and use'd Parse::RecDescent.
- Add a new t/precompile.t to test precompilation.
- Add a new $_FILENAME global to Parse::RecDescent to make it
easy for the Precompile method to find the module.
- Remove the prototype from _generate. It is not required, and
it caused t/precompile.t (which ends up re-definiing a lot of
Parse::RecDescent subroutines) to fail needlessly, as the
calls to _generate in Replace and Extend normally do not see
the prototype, but do when re-defined.
- POD documentation for standalone parsers added.
1.967_005 Wed Feb 8 18:46:35 2012
- Added JTBRAUN@CPAN.org as author in Build.PL.
- Added ExtUtils::MakeMaker build/configure version
requirements. (RT.cpan.org #74787, Thanks POPEL!)
1.967006 Fri Feb 10 20:48:48 2012
- Bumped version to 1.967006 for non-development release.
1.967_007 Thu Feb 23 07:26:03 2012
- Revised ExtUtils::MakeMaker build/configure version
requirements. (RT.cpan.org #74787, Thanks Paul!)
- Revised Text::Balanced prereq to require version 1.95,
necessary for t/skip.t to pass.
(RT.cpan.org #74787, Thanks Paul!)
- Removed unused version.pm prereq.
- Fix a circular reference memory leak caused by the use of
$AUTOLOAD in sub AUTOLOAD{} in the generated parser's
namespace. Workaround documented in perl5 RT #110248.
Workaround a circular reference memory leak in ISA documented
by perl5 RT #92708. A parser's DESTROY() method redefines all
subs before deleting the stash, to avoid circular references
between subrules. (RT #53710, thanks Andreas!)
- Parse::RecDescent::AUTOLOAD did not correctly handle
initializing the line counting mechanism when a reference to a
scalar was passed to the parser. (RT.cpan.org #27705, thanks
Justin!)
1.967_007 Tue Mar 13 22:28:00 2012
- Restore old _parserepeat calling convention. Change a
parser's DESTROY method to check for $self->{_not_precompiled}
instead of $self->{_precompiled}. (Fix for RT #74593).