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- Add p5-constant-defer 6

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constant::defer creates a subroutine which on the first call runs given code to
calculate its value, and on any subsequent calls just returns that value, like a
constant. The value code is discarded once run, allowing it to be garbage
collected.

Deferring a calculation is good if it might take a lot of work or produce a big
result but is only needed sometimes or only well into a program run. If it's
never needed then the value code never runs.

A deferred constant is generally not inlined or folded (see "Constant Folding"
in perlop) since it's not a single scalar value. In the current implementation a
deferred constant becomes a plain constant after the first use, so may inline
etc in code compiled after that (see "IMPLEMENTATION" below).

WWW: http://search.cpan.org/dist/constant-defer/
This commit is contained in:
Sunpoet Po-Chuan Hsieh 2015-04-26 12:28:06 +00:00
parent cdf02c1098
commit 440fa2dcaf
Notes: svn2git 2021-03-31 03:12:20 +00:00 
svn path=/head/; revision=384782
5 changed files with 38 additions and 0 deletions
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1
devel/Makefile
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@ -3239,6 +3239,7 @@
SUBDIR += p5-constant
SUBDIR += p5-constant-boolean
SUBDIR += p5-constant-def
SUBDIR += p5-constant-defer
SUBDIR += p5-constant-lexical
SUBDIR += p5-cpan-listchanges
SUBDIR += p5-enum

18
devel/p5-constant-defer/Makefile Normal file
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@ -0,0 +1,18 @@
# Created by: Sunpoet Po-Chuan Hsieh <sunpoet@FreeBSD.org>
# $FreeBSD$
PORTNAME= constant-defer
PORTVERSION= 6
CATEGORIES= devel perl5
MASTER_SITES= CPAN
PKGNAMEPREFIX= p5-
MAINTAINER= sunpoet@FreeBSD.org
COMMENT= Constant subs with deferred value calculation
LICENSE= GPLv3
USE_PERL5= configure
USES= perl5
.include <bsd.port.mk>

2
devel/p5-constant-defer/distinfo Normal file
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@ -0,0 +1,2 @@
SHA256 (constant-defer-6.tar.gz) = 7b21263198ca22686efff3ae987a240be423dd2160afdeb29fe716d032986ffa
SIZE (constant-defer-6.tar.gz) = 43427

15
devel/p5-constant-defer/pkg-descr Normal file
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@ -0,0 +1,15 @@
constant::defer creates a subroutine which on the first call runs given code to
calculate its value, and on any subsequent calls just returns that value, like a
constant. The value code is discarded once run, allowing it to be garbage
collected.
Deferring a calculation is good if it might take a lot of work or produce a big
result but is only needed sometimes or only well into a program run. If it's
never needed then the value code never runs.
A deferred constant is generally not inlined or folded (see "Constant Folding"
in perlop) since it's not a single scalar value. In the current implementation a
deferred constant becomes a plain constant after the first use, so may inline
etc in code compiled after that (see "IMPLEMENTATION" below).
WWW: http://search.cpan.org/dist/constant-defer/

2
devel/p5-constant-defer/pkg-plist Normal file
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@ -0,0 +1,2 @@
%%SITE_PERL%%/constant/defer.pm
%%PERL5_MAN3%%/constant::defer.3.gz