X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/b98db56f114afdf243afe456e23c7ea16890847f..bc5b875de85419d38688b47e0d40ff808f0ebd86:/doc/todo/tracking_bugs_with_dependencies.mdwn

diff --git a/doc/todo/tracking_bugs_with_dependencies.mdwn b/doc/todo/tracking_bugs_with_dependencies.mdwn
index 357cc33a8..3af0458bd 100644
--- a/doc/todo/tracking_bugs_with_dependencies.mdwn
+++ b/doc/todo/tracking_bugs_with_dependencies.mdwn
@@ -9,6 +9,9 @@ I like the idea of [[tips/integrated_issue_tracking_with_ikiwiki]], and I do so
 > One way to do this would be to introduce variables into the pagespec, along with
 > universal and/or existential [[!wikipedia Quantification]].  That looks quite complex.
 >
+>> I thought about this briefly, and got about that far.. glad you got
+>> further. :-) --[[Joey]]
+> 
 > Another option would be go with a more functional syntax.  The concept here would
 > be to allow a pagespec to appear in a 'pagespec function' anywhere a page can.  e.g.
 > I could pass a pagespec to `link()` and that would return true if there is a link to any
@@ -22,6 +25,9 @@ I like the idea of [[tips/integrated_issue_tracking_with_ikiwiki]], and I do so
 > ends, and that isn't a regular language (we can't use regular expression matching for
 > easy parsing).
 >
+>> Also, it may cause ambiguities with page names that contain parens
+>> (though some such ambigutities already exist with the pagespec syntax).
+>
 > One simplification of that would be to introduce some pagespec [[shortcuts]].  We could
 > then allow pagespec functions to take either pages, or named pagespec shortcuts.  The
 > pagespec shortcuts would just be listed on a special page, like current [[shortcuts]].
@@ -37,6 +43,30 @@ I like the idea of [[tips/integrated_issue_tracking_with_ikiwiki]], and I do so
 >
 > -- [[Will]]
 
+>> Having a separate page for the shortcuts feels unwieldly.. perhaps
+>> instead the shortcut could be defined earlier in the scope of the same
+>> pagespec that uses it?
+>> 
+>> Example: `define(~bugs, bugs/* and !*/Discussion) and define(~openbugs, ~bugs and !link(done)) and ~openbugs and !link(~openbugs)`
+
+>>> That could work.  parens are only ever nested 1 deep in that grammar so it is regular and the current parsing would be ok.
+
+>> Note that I made the "~" explicit, not implicit, so it could be left out. In the case of ambiguity between
+>> a definition and a page name, the definition would win.
+
+>>> That was my initial thought too :), but when implementing it I decided that requiring the ~ made things easier.  I'll probably require the ~ for the first pass at least.
+
+>> So, equivilant example: `define(bugs, bugs/* and !*/Discussion) and define(openbugs, bugs and !link(done)) and openbugs and !link(openbugs)`
+>> 
+>> Re recursion, it is avoided.. but building a pagespec that is O(N^X) where N is the
+>> number of pages in the wiki is not avoided. Probably need to add DOS prevention.
+>>  --[[Joey]]
+
+>>> If you memoize the outcomes of the named pagespecs you can make in O(N.X), no?
+>>> -- [[Will]]
+
+>>>> Yeah, guess that'd work. :-)
+
 > One quick further thought.  All the above discussion assumes that 'dependency' is the
 > same as 'links to', which is not really true.  For example, you'd like to be able to say
 > "This bug does not depend upon [ [ link to other bug ] ]" and not have a dependency.
@@ -62,155 +92,346 @@ matches the appropriate page spec.  There is no good list of pages available to
 does not give me a good list of pages.  I found the same thing when I was working on
 this todo [[todo/Add_a_plugin_to_list_available_pre-processor_commands]].
 
-Immediately below is a patch for IkiWiki.pm.  Below that is a new plugin `definepagespec `
-which behaves like `shortcut` for pagespecs.
+> I'm not sure why iterating over `%pagesources` wouldn't work here, it's the same method
+> used by anything that needs to match a pagespec against all pages..? --[[Joey]]
 
-----
+>> My uchecked hypothesis is that %pagesources is created after the refresh hook.
+>> I've also been concerned about how globally defined pagespec shortcuts would interact with
+>> the page dependancy system.  Your idea of internally defined shortcuts should fix that. -- [[Will]]
+
+>>> You're correct, the refresh hook is run very early, before pagesources
+>>> is populated. (It will be partially populated on a refresh, but will
+>>> not be updated to reflect new pages.) Agree that internally defined
+>>> seems the way to go. --[[Joey]]
+
+Immediately below is a patch which seems to basically work.  Lots of debugging code is still there
+and it needs a cleanup, but I thought it worth posting at this point.  (I was having problems
+with old style glob lists, so i just switched them off for the moment.)
+
+The following three inlines work for me with this patch:
+
+    Bugs:
+    
+    [ [!inline pages="define(~bugs, bugs/* and ! */Discussion) and ~bugs" archive="yes"]]
+    
+    OpenBugs:
+    
+    [ [!inline pages="define(~bugs, bugs/* and ! */Discussion) and define(~openbugs,~bugs and !link(done)) and ~openbugs" archive="yes"]]
+    
+    ReadyBugs:
+    
+    [ [!inline pages="define(~bugs, bugs/* and ! */Discussion) and define(~openbugs,~bugs and !link(done)) and define(~readybugs,~openbugs and !link(~openbugs)) and ~readybugs" archive="yes"]]
+
+> Nice! Could the specfuncsref be passed in %params? I'd like to avoid
+> needing to change the prototype of every pagespec function, since several
+> plugins define them too. --[[Joey]]
+
+>> Maybe - it needs more thought.  I also considered it when I was going though changing all those plugins :).
+>> My concern was that `%params` can contain other user-defined parameters,
+>> e.g. `link(target, otherparameter)`, and that means that the specFuncs could be clobbered by a user (or other
+>> weird security hole).  I thought it better to separate it, but I didn't think about it too hard.  I might move it to
+>> the first parameter rather than the second.  Ikiwiki is my first real perl hacking and I'm still discovering
+>> good ways to write things in perl.
+>>
+>>>> `%params` contains the parameters passed to `pagespec_match`, not
+>>>> user-supplied parameters. The user-supplied parameter to a function
+>>>> like `match_glob()` or `match_link()` is passed in the second positional parameter. --[[Joey]]
+
+>>>>> OK.  That seems reasonable then.  The only problem is that my PERLfu is not strong enough to make it
+>>>>> work.  I really have to wonder what substance was influencing the designers of PERL...
+>>>>> I can't figure out how to use the %params.  And I'm pissed off enough with PERL that I'm not going
+>>>>> to try and figure it out any more.  There are two patches below now.  The first one uses an extra
+>>>>> argument and works.  The second one tries to use %params and doesn't - take your pick :-). -- [[Will]]
+
+>> What do you think is best to do about `is_globlist()`?  At the moment it requires that the 'second word', as
+>> delimited by a space and ignoring parens, is 'and' or 'or'.  This doesn't hold in the above example pagespecs (so I just hard wired it to 0 to test my patch).
+>> My thought was just to search for 'and' or 'or' as words anywhere in the pagespec.  Thoughts?
+
+>>> Dunno, we could just finish deprecating it. Or change the regexp to
+>>> skip over spaces in parens. (`/[^\s]+\s+([^)]+)/`) --[[Joey]]
+
+>>>> I think I have a working regexp now.
+
+>> Oh, one more thing.  In pagespec_translate (now pagespec_makeperl), there is a part of the regular expression for `# any other text`.
+>> This contained `()`, which has no effect.  I replaced that with `\(\)`, but that is a change in the definition of pagespecs unrelated to the
+>> rest of this patch. In a related change, commands were not able to contain `)` in their parameters.  I've extended that so the cannot
+>> contain `(` or `)`.  -- [[Will]]
+
+>>> `[^\s()]+` is a character class matching all characters not spaces or
+>>> parens. Since the pervious terminals in the regexp consume most
+>>> occurances of an open paren or close paren, it's unlikely for one to
+>>> get through to that part of the regexp. For example, "foo()" will be
+>>> matched by the command matcher; "(foo)" will be matched by the open
+>>> paren literal terminal. "foo(" and "foo)" can get through to the
+>>> end, and would be matched as a page name, if it didn't exclude parens.
+>>>
+>>> So why exclude them? Well, consider "foo and(bar and baz)". We don't
+>>> want it to match "and(" as a page name!
+>>> 
+>>> Escaping the parens in the character class actually changes nothing; the
+>>> changed character class still matches all characters not spaces or
+>>> parens. (Try it!).
+>>> 
+>>> Re commands containing '(', I don't really see any reason not to
+>>> allow that, unless it breaks something. --[[Joey]]
+
+>>>> Oh, I didn't realise you didn't need to escape parens inside [].  All else I
+>>>> I understood.  I have stopped commands from containing parens because
+>>>> once you allow that then you might have a extra level of depth in the parsing
+>>>> of define() statements. -- [[Will]]
+
+>>> Updated patch.  Moved the specFuncsRef to the front of the arg list.  Still haven't thought through the security implications of
+>>> having it in `%params`.  I've also removed all the debugging `print` statements.  And I've updated the `is_globlist()` function.
+>>> I think this is ready for people other than me to have a play.  It is not well enough tested to commit just yet.
+>>> -- [[Will]]
 
-diff --git a/IkiWiki.pm b/IkiWiki.pm
-index e476521..1d2d48c 100644
---- a/IkiWiki.pm
-+++ b/IkiWiki.pm
-@@ -14,7 +14,7 @@ use open qw{:utf8 :std};
- use vars qw{%config %links %oldlinks %pagemtime %pagectime %pagecase
- 	    %pagestate %renderedfiles %oldrenderedfiles %pagesources
- 	    %destsources %depends %hooks %forcerebuild $gettext_obj
--	    %loaded_plugins};
-+	    %loaded_plugins %named_pagespec};
- 
- use Exporter q{import};
- our @EXPORT = qw(hook debug error template htmlpage add_depends pagespec_match
-@@ -22,7 +22,7 @@ our @EXPORT = qw(hook debug error template htmlpage add_depends pagespec_match
-                  displaytime will_render gettext urlto targetpage
- 		 add_underlay
-                  %config %links %pagestate %renderedfiles
--                 %pagesources %destsources);
-+                 %pagesources %destsources %named_pagespec);
- our $VERSION = 2.00; # plugin interface version, next is ikiwiki version
- our $version='unknown'; # VERSION_AUTOREPLACE done by Makefile, DNE
- my $installdir=''; # INSTALLDIR_AUTOREPLACE done by Makefile, DNE
-@@ -1271,7 +1271,7 @@ sub loadindex () { #{{{
- 	%oldrenderedfiles=%pagectime=();
- 	if (! $config{rebuild}) {
- 		%pagesources=%pagemtime=%oldlinks=%links=%depends=
--		%destsources=%renderedfiles=%pagecase=%pagestate=();
-+		%destsources=%renderedfiles=%pagecase=%pagestate=%named_pagespec=();
- 	}
- 	my $in;
- 	if (! open ($in, "<", "$config{wikistatedir}/indexdb")) {
-@@ -1729,6 +1729,8 @@ sub match_glob ($$;@) { #{{{
- 	
- 	my $from=exists $params{location} ? $params{location} : '';
- 	
-+	print "Matching glob $glob \n";
-+	
- 	# relative matching
- 	if ($glob =~ m!^\./!) {
- 		$from=~s#/?[^/]+$##;
-@@ -1736,6 +1738,18 @@ sub match_glob ($$;@) { #{{{
- 		$glob="$from/$glob" if length $from;
- 	}
- 
-+	if (substr($glob, 0, 1) eq '~') {
-+		my $specname = substr($glob, 1);
-+		print "Checking for pagespec named $specname \n";
-+		if (exists $IkiWiki::named_pagespec{$specname}) {
-+			my $spec = $IkiWiki::named_pagespec{$specname};
-+			return IkiWiki::pagespec_match($page, $spec, %params);
-+		} else {
-+			print "Couldn't find pagespec\n";
-+			return IkiWiki::FailReason->new("Page spec $specname referenced on page $page does not exist");
-+		}
-+	}
-+
- 	my $regexp=IkiWiki::glob2re($glob);
- 	if ($page=~/^$regexp$/i) {
- 		if (! IkiWiki::isinternal($page) || $params{internal}) {
-@@ -1756,11 +1770,36 @@ sub match_internal ($$;@) { #{{{
- 
- sub match_link ($$;@) { #{{{
- 	my $page=shift;
--	my $link=lc(shift);
-+	my $fulllink=shift;
-+	my $link=lc($fulllink);
- 	my %params=@_;
- 
-+	print "Matching link $fulllink \n";
-+	
- 	my $from=exists $params{location} ? $params{location} : '';
- 
-+	if (substr($fulllink, 0, 1) eq '~') {
-+		my $specname = substr($fulllink, 1);
-+		print "Checking link pagespec $specname \n";
-+		if (exists $IkiWiki::named_pagespec{$specname}) {
-+			my $spec = $IkiWiki::named_pagespec{$specname};
-+			
-+			print "Checking all pages against $spec\n";
-+			
-+			foreach my $nextpage (keys %IkiWiki::pagesources) {
-+				print "Checking $nextpage against $spec\n";
-+				if (pagespec_match($nextpage, $spec, %params) && IkiWiki::PageSpec::match_link($page, $nextpage, %params)) {
-+					return IkiWiki::SuccessReason->new("$page links to page $nextpage matching $link")
-+				}
-+			}
-+			
-+			return IkiWiki::FailReason->new("$page has no links to any pages that match $spec");
-+		} else {
-+			print "Pagespec $specname not found\n";
-+			return IkiWiki::FailReason->new("$page cannot link to nonexistent spec name $specname");
-+		}
-+	}
-+
- 	# relative matching
- 	if ($link =~ m!^\.! && defined $from) {
- 		$from=~s#/?[^/]+$##;
+I've lost track of the indent level, so I'm going back to not indented - I think this is a working [[patch]] taking into
+account all comments above (which doesn't mean it is above reproach :) ).  --[[Will]]
 
 ----
 
-#!/usr/bin/perl
-package IkiWiki::Plugin::definepagespec;
-
-use warnings;
-use strict;
-use IkiWiki 2.00;
-
-sub import { #{{{
-	hook(type => "getsetup", id => "definepagespec", call => \&getsetup);
-	hook(type => "refresh", id => "definepagespec", call => \&refresh);
-	hook(type => "preprocess", id => "definepagespec", call => \&preprocess);
-} #}}}
-
-sub getsetup () { #{{{
-	return
-		plugin => {
-			safe => 1,
-			rebuild => undef,
-		},
-} #}}}
-
-sub refresh () { #{{{
-	# Preprocess the shortcuts page to get all the available shortcuts
-	# defined before other pages are rendered.
-	my $srcfile=srcfile("pagespecs.mdwn", 1);
-	if (! defined $srcfile) {
-		error(gettext("definepagespec plugin will not work without a pagespecs.mdwn"));
-	}
-	IkiWiki::preprocess("pagespecs", "pagespecs", readfile($srcfile));
-} # }}}
-
-sub preprocess (@) { #{{{
-	my %params=@_;
-
-	if (! defined $params{name} || ! defined $params{spec}) {
-		error gettext("missing name or spec parameter");
-	}
-
-	$IkiWiki::named_pagespec{$params{name}} = $params{spec};
-
-	#translators: This is used to display what shortcuts are defined.
-	#translators: First parameter is the name of the shortcut, the second
-	#translators: is an URL.
-	return sprintf(gettext("pagespec %s refers to <i>%s</i>"), $params{name}, $params{spec});
-} # }}}
-
-1
+    diff --git a/IkiWiki.pm b/IkiWiki.pm
+    index 4e4da11..8b3cdfe 100644
+    --- a/IkiWiki.pm
+    +++ b/IkiWiki.pm
+    @@ -1550,7 +1550,16 @@ sub globlist_to_pagespec ($) { #{{{
+     
+     sub is_globlist ($) { #{{{
+     	my $s=shift;
+    -	return ( $s =~ /[^\s]+\s+([^\s]+)/ && $1 ne "and" && $1 ne "or" );
+    +	return ! ($s =~ /
+    +			(^\s*
+    +				[^\s(]+		# single item
+    +					(\(			# possibly with parens after it
+    +						([^)]*	# with stuff inside those parens
+    +						(\([^)]*\))*)*	# maybe even nested parens
+    +					\))?\s*$
+    +			) |
+    +				(\s and \s) | (\s or \s)	# or we find 'and' or 'or' somewhere
+    +			/xs);
+     } #}}}
+     
+     sub safequote ($) { #{{{
+    @@ -1631,7 +1640,7 @@ sub pagespec_merge ($$) { #{{{
+     	return "($a) or ($b)";
+     } #}}}
+     
+    -sub pagespec_translate ($) { #{{{
+    +sub pagespec_makeperl ($) { #{{{
+     	my $spec=shift;
+     
+     	# Support for old-style GlobLists.
+    @@ -1650,12 +1659,14 @@ sub pagespec_translate ($) { #{{{
+     		|
+     			\)		# )
+     		|
+    -			\w+\([^\)]*\)	# command(params)
+    +			define\(\s*~\w+\s*,((\([^()]*\)) | ([^()]+))+\)	# define(~specName, spec) - spec can contain parens 1 deep
+    +		|
+    +			\w+\([^()]*\)	# command(params) - params cannot contain parens
+     		|
+     			[^\s()]+	# any other text
+     		)
+     		\s*		# ignore whitespace
+    -	}igx) {
+    +	}igxs) {
+     		my $word=$1;
+     		if (lc $word eq 'and') {
+     			$code.=' &&';
+    @@ -1666,16 +1677,23 @@ sub pagespec_translate ($) { #{{{
+     		elsif ($word eq "(" || $word eq ")" || $word eq "!") {
+     			$code.=' '.$word;
+     		}
+    -		elsif ($word =~ /^(\w+)\((.*)\)$/) {
+    +		elsif ($word =~ /^define\(\s*~(\w+)\s*,(.*)\)$/s) {
+    +			$code .= " (\$params{specFuncs}->{$1}=";	# (exists \$params{specFuncs}) && 
+    +			$code .= "memoize(";
+    +			$code .= &pagespec_makeperl($2);
+    +			$code .= ")";
+    +			$code .= ") ";
+    +		}
+    +		elsif ($word =~ /^(\w+)\((.*)\)$/s) {
+     			if (exists $IkiWiki::PageSpec::{"match_$1"}) {
+    -				$code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \@_)";
+    +				$code.="IkiWiki::PageSpec::match_$1(\$page, ".safequote($2).", \%params)";
+     			}
+     			else {
+     				$code.=' 0';
+     			}
+     		}
+     		else {
+    -			$code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \@_)";
+    +			$code.=" IkiWiki::PageSpec::match_glob(\$page, ".safequote($word).", \%params)";
+     		}
+     	}
+     
+    @@ -1683,8 +1701,18 @@ sub pagespec_translate ($) { #{{{
+     		$code=0;
+     	}
+     
+    +	return 'sub { my $page=shift; my %params = @_; '.$code.' }';
+    +} #}}}
+    +
+    +sub pagespec_translate ($) { #{{{
+    +	my $spec=shift;
+    +
+    +	my $code = pagespec_makeperl($spec);
+    +
+    +	# print STDERR "Spec '$spec' generated code '$code'\n";
+    +
+     	no warnings;
+    -	return eval 'sub { my $page=shift; '.$code.' }';
+    +	return eval $code;
+     } #}}}
+     
+     sub pagespec_match ($$;@) { #{{{
+    @@ -1699,7 +1727,7 @@ sub pagespec_match ($$;@) { #{{{
+     
+     	my $sub=pagespec_translate($spec);
+     	return IkiWiki::FailReason->new("syntax error in pagespec \"$spec\"") if $@;
+    -	return $sub->($page, @params);
+    +	return $sub->($page, @params, specFuncs => {});
+     } #}}}
+     
+     sub pagespec_valid ($) { #{{{
+    @@ -1748,11 +1776,78 @@ sub new { #{{{
+     
+     package IkiWiki::PageSpec;
+     
+    +sub check_named_spec($$;@) {
+    +	my $page=shift;
+    +	my $specName=shift;
+    +	my %params=@_;
+    +	
+    +	error("Unable to find specFuncs in params to check_named_spec()!") unless exists $params{specFuncs};
+    +
+    +	my $specFuncsRef=$params{specFuncs};
+    +	
+    +	return IkiWiki::FailReason->new("Named page spec '$specName' is not valid")
+    +		unless (substr($specName, 0, 1) eq '~');
+    +	
+    +	$specName = substr($specName, 1);
+    +
+    +	if (exists $specFuncsRef->{$specName}) {
+    +		# remove the named spec from the spec refs
+    +		# when we recurse to avoid infinite recursion
+    +		my $sub = $specFuncsRef->{$specName};
+    +		delete $specFuncsRef->{$specName};
+    +		my $result = $sub->($page, %params);
+    +		$specFuncsRef->{$specName} = $sub;
+    +		return $result;
+    +	} else {
+    +		return IkiWiki::FailReason->new("Page spec '$specName' does not exist");
+    +	}
+    +}
+    +
+    +sub check_named_spec_existential($$$;@) {
+    +	my $page=shift;
+    +	my $specName=shift;
+    +	my $funcref=shift;
+    +	my %params=@_;
+    +	
+    +	error("Unable to find specFuncs in params to check_named_spec_existential()!") unless exists $params{specFuncs};
+    +	my $specFuncsRef=$params{specFuncs};
+    +	
+    +	return IkiWiki::FailReason->new("Named page spec '$specName' is not valid")
+    +		unless (substr($specName, 0, 1) eq '~');
+    +	$specName = substr($specName, 1);
+    +	
+    +	if (exists $specFuncsRef->{$specName}) {
+    +		# remove the named spec from the spec refs
+    +		# when we recurse to avoid infinite recursion
+    +		my $sub = $specFuncsRef->{$specName};
+    +		delete $specFuncsRef->{$specName};
+    +		
+    +		foreach my $nextpage (keys %IkiWiki::pagesources) {
+    +			if ($sub->($nextpage, %params)) {
+    +				my $tempResult = $funcref->($page, $nextpage, %params);
+    +				if ($tempResult) {
+    +					$specFuncsRef->{$specName} = $sub;
+    +					return $tempResult;
+    +				}
+    +			}
+    +		}
+    +		
+    +		$specFuncsRef->{$specName} = $sub;
+    +		return IkiWiki::FailReason->new("No page in spec '$specName' was successfully matched");
+    +	} else {
+    +		return IkiWiki::FailReason->new("Named page spec '$specName' does not exist");
+    +	}
+    +}
+    +
+     sub match_glob ($$;@) { #{{{
+     	my $page=shift;
+     	my $glob=shift;
+     	my %params=@_;
+     	
+    +	if (substr($glob, 0, 1) eq '~') {
+    +		return check_named_spec($page, $glob, %params);
+    +	}
+    +
+     	my $from=exists $params{location} ? $params{location} : '';
+     	
+     	# relative matching
+    @@ -1782,11 +1877,12 @@ sub match_internal ($$;@) { #{{{
+     
+     sub match_link ($$;@) { #{{{
+     	my $page=shift;
+    -	my $link=lc(shift);
+    +	my $fulllink=shift;
+     	my %params=@_;
+    +	my $link=lc($fulllink);
+     
+     	my $from=exists $params{location} ? $params{location} : '';
+    -
+    +	
+     	# relative matching
+     	if ($link =~ m!^\.! && defined $from) {
+     		$from=~s#/?[^/]+$##;
+    @@ -1804,19 +1900,32 @@ sub match_link ($$;@) { #{{{
+     		}
+     		else {
+     			return IkiWiki::SuccessReason->new("$page links to page $p matching $link")
+    -				if match_glob($p, $link, %params);
+    +				if match_glob($p, $fulllink, %params);
+     		}
+     	}
+     	return IkiWiki::FailReason->new("$page does not link to $link");
+     } #}}}
+     
+     sub match_backlink ($$;@) { #{{{
+    -	return match_link($_[1], $_[0], @_);
+    +	my $page=shift;
+    +	my $backlink=shift;
+    +	my @params=@_;
+    +
+    +	if (substr($backlink, 0, 1) eq '~') {
+    +		return check_named_spec_existential($page, $backlink, \&match_backlink, @params);
+    +	}
+    +
+    +	return match_link($backlink, $page, @params);
+     } #}}}
+     
+     sub match_created_before ($$;@) { #{{{
+     	my $page=shift;
+     	my $testpage=shift;
+    +	my @params=@_;
+    +
+    +	if (substr($testpage, 0, 1) eq '~') {
+    +		return check_named_spec_existential($page, $testpage, \&match_created_before, @params);
+    +	}
+     
+     	if (exists $IkiWiki::pagectime{$testpage}) {
+     		if ($IkiWiki::pagectime{$page} < $IkiWiki::pagectime{$testpage}) {
+    @@ -1834,6 +1943,11 @@ sub match_created_before ($$;@) { #{{{
+     sub match_created_after ($$;@) { #{{{
+     	my $page=shift;
+     	my $testpage=shift;
+    +	my @params=@_;
+    +
+    +	if (substr($testpage, 0, 1) eq '~') {
+    +		return check_named_spec_existential($page, $testpage, \&match_created_after, @params);
+    +	}
+     
+     	if (exists $IkiWiki::pagectime{$testpage}) {
+     		if ($IkiWiki::pagectime{$page} > $IkiWiki::pagectime{$testpage}) {