Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
Template::Stash::ConteUser)Contributed Perl DocumenTemplate::Stash::Context(3)

       Template::Stash::Context	- Experimetal stash allowing list/scalar
       context definition

	   use Template;
	   use Template::Stash::Context;

	   my $stash = Template::Stash::Context->new(\%vars);
	   my $tt2   = Template->new({ STASH =>	$stash });

       This is an alternate stash object which includes	a patch	from Craig
       Barratt to implement various new	virtual	methods	to allow dotted
       template	variable to denote if object methods and subroutines should be
       called in scalar	or list	context.  It adds a little overhead to each
       stash call and I'm a little wary	of applying that to the	core default
       stash without investigating the effects first. So for now, it's
       implemented as a	separate stash module which will allow us to test it
       out, benchmark it and switch it in or out as we require.

       This is what Craig has to say about it:

       Here's a	better set of features for the core.  Attached is a new
       version of (based on TT2.02) that:

       * supports the special op "scalar" that forces scalar context on
       function	calls, eg:


       calls cgi.param("foo") in scalar	context	(unlike	my wimpy scalar	op
       from last night).  Array	context	is the default.

       With non-function operands, scalar behaves like the perl	version	(eg:
       no-op for scalar, size for arrays, etc).

       * supports the special op "ref" that behaves like the perl ref.	If
       applied to a function the function is not called.  Eg:


       does *not* call cgi.param and evaluates to "CODE".  Similarly,
       HASH.ref, ARRAY.ref return what you expect.

       * adds a	new scalar and list op called "array" that is a	no-op for
       arrays and promotes scalars to one-element arrays.

       * allows	scalar ops to be applied to arrays and hashes in place,	eg:
       ARRAY.repeat(3) repeats each element in place.

       * allows	list ops to be applied to scalars by promoting the scalars to
       one-element arrays (like	an implicit "array").  So you can do things
       like SCALAR.size, SCALAR.join and get a useful result.

       This also means you can now use x.0 to safely get the first element
       whether x is an array or	scalar.

       The new	passes the TT2.02 test suite.  But I haven't tested
       the new features	very much.  One	nagging	implementation problem is that
       the "scalar" and	"ref" ops have higher precedence than user variable

       Andy Wardley <>


       1.63, distributed as part of the	Template Toolkit version 3.009,
       released	on 30 March 2020.

	 Copyright (C) 1996-2007 Andy Wardley.	All Rights Reserved.

       This module is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.


perl v5.32.1			  2020-07-13	   Template::Stash::Context(3)


Want to link to this manual page? Use this URL:

home | help