[svn:perl6-synopsis] r13096 - doc/trunk/design/syn

[la...@cvs.perl.org]

Author: larry
Date: Thu Oct 12 14:52:22 2006
New Revision: 13096

Modified:
doc/trunk/design/syn/S01.pod
doc/trunk/design/syn/S05.pod

Log:
Changed enforced backtracking from + to ! to avoid conflicting with Friedl's ++

Modified: doc/trunk/design/syn/S01.pod
==============================================================================
--- doc/trunk/design/syn/S01.pod (original)
+++ doc/trunk/design/syn/S01.pod Thu Oct 12 14:52:22 2006
@@ -89,7 +89,7 @@
=item *

Perl 6 should be malleable enough that it can evolve into the imaginary
-perfect language, Perl 7. This darwinian imperative implies support
+perfect language, Perl 7. This darwinian imperative implies support
for multiple syntaxes above and multiple platforms below.

=item *

Modified: doc/trunk/design/syn/S05.pod
==============================================================================
--- doc/trunk/design/syn/S05.pod (original)
+++ doc/trunk/design/syn/S05.pod Thu Oct 12 14:52:22 2006
@@ -14,9 +14,9 @@
Maintainer: Patrick Michaud <pmic...@pobox.com> and
Larry Wall <la...@wall.org>
Date: 24 Jun 2002
- Last Modified: 9 Oct 2006
+ Last Modified: 12 Oct 2006
Number: 5
- Version: 38
+ Version: 39

This document summarizes Apocalypse 5, which is about the new regex
syntax. We now try to call them I<regex> rather than "regular
@@ -1230,9 +1230,9 @@
never backtrack in a C<token> unless some outer regex has specified a
C<:panic> option that applies. If you want to prevent even that, use
C<*:>, C<+:>, or C<?:> to prevent any backtracking into the quantifier.
-If you want to explicitly backtrack, append either a C<?> or a C<+>
+If you want to explicitly backtrack, append either a C<?> or a C<!>
to the quantifier. The C<?> forces minimal matching as usual,
-while the C<+> forces greedy matching. The C<token> declarator is
+while the C<!> forces greedy matching. The C<token> declarator is
really just short for

regex :ratchet { ... }
@@ -1279,16 +1279,16 @@

=item *

-To force the preceding atom to do greedy backtracking,
-append a C<:+> or C<+> to the atom. If the preceding token
-is a quantifier, the C<:> may be omitted. (Perl 5 has no
-corresponding construct because backtracking always defaults
-to greedy in Perl 5.)
+To force the preceding atom to do greedy backtracking in a
+spot that would default otherwise, append a C<:!> to the atom.
+If the preceding token is a quantifier, the C<:> may be omitted.
+(Perl 5 has no corresponding construct because backtracking always
+defaults to greedy in Perl 5.)

=item *

To force the preceding atom to do no backtracking, use a single C<:>
-without a subsequent C<?> or C<+>.
+without a subsequent C<?> or C<!>.
Backtracking over a single colon causes the regex engine not to retry
the preceding atom:

@@ -1316,7 +1316,7 @@
an alternation, so you may also need to put C<:> after it if you
also want to disable that. If an explicit or implicit C<:ratchet>
has disabled backtracking by supplying an implicit C<:>, you need to
-put an explicit C<:+> after the alternation to enable backing into
+put an explicit C<!> after the alternation to enable backing into
another alternative if the first pick fails.

=item *