String eval is often used for dynamic code generation. For instance, Moose uses

it heavily, to generate inlined versions of accessors and constructors, which
speeds code up at runtime by a significant amount. String eval is not without
its issues however - it's difficult to control the scope it's used in (which
determines which variables are in scope inside the eval), and it can be quite
slow, especially if doing a large number of evals.

This module attempts to solve both of those problems. It provides an
eval_closure function, which evals a string in a clean environment, other than
a fixed list of specified variables. It also caches the result of the eval, so
that doing repeated evals of the same source, even with a different
environment, will be much faster (but note that the description is part of the
string to be evaled, so it must also be the same (or non-existent) if caching
is to work properly).

5 files changed, 53 insertions, 0 deletions

diff --git a/devel/Makefile b/devel/Makefile
index ae531d8b479f..b4712f144735 100644
--- a/devel/Makefile
+++ b/devel/Makefile
@@ -1616,6 +1616,7 @@
     SUBDIR += p5-Env-PS1
     SUBDIR += p5-Env-Path
     SUBDIR += p5-Errno
+    SUBDIR += p5-Eval-Closure
     SUBDIR += p5-Eval-Context
     SUBDIR += p5-Event
     SUBDIR += p5-Event-ExecFlow
diff --git a/devel/p5-Eval-Closure/Makefile b/devel/p5-Eval-Closure/Makefile
new file mode 100644
index 000000000000..e052a617e028
--- /dev/null
+++ b/devel/p5-Eval-Closure/Makefile
@@ -0,0 +1,29 @@
+# New ports collection makefile for:	Eval::Closure
+# Date created:				2011-06-06
+# Whom:					Andrej Zverev <az@FreeBSD.org>
+#
+# $FreeBSD$
+#
+
+PORTNAME=	Eval-Closure
+PORTVERSION=	0.06
+CATEGORIES=	devel perl5
+MASTER_SITES=	CPAN
+MASTER_SITE_SUBDIR=	CPAN:DOY
+PKGNAMEPREFIX=	p5-
+
+MAINTAINER=	perl@FreeBSD.org
+COMMENT=	Safely and cleanly create closures via string eval
+
+BUILD_DEPENDS=	p5-Sub-Exporter>=0:${PORTSDIR}/devel/p5-Sub-Exporter \
+		p5-Try-Tiny>0:${PORTSDIR}/lang/p5-Try-Tiny
+RUN_DEPENDS:=	${BUILD_DEPENDS}
+
+LICENSE_COMB=	dual
+LICENSE=	ART20 GPLv1
+
+PERL_CONFIGURE=	yes
+
+MAN3=	Eval::Closure.3
+
+.include <bsd.port.mk>
diff --git a/devel/p5-Eval-Closure/distinfo b/devel/p5-Eval-Closure/distinfo
new file mode 100644
index 000000000000..fef5f82b9402
--- /dev/null
+++ b/devel/p5-Eval-Closure/distinfo
@@ -0,0 +1,2 @@
+SHA256 (Eval-Closure-0.06.tar.gz) = 2c425b6189c30dd0782c22f86e16c578b508ab78c3398edc8fbc8f7cda8b4e62
+SIZE (Eval-Closure-0.06.tar.gz) = 15676
diff --git a/devel/p5-Eval-Closure/pkg-descr b/devel/p5-Eval-Closure/pkg-descr
new file mode 100644
index 000000000000..a08e85f714c2
--- /dev/null
+++ b/devel/p5-Eval-Closure/pkg-descr
@@ -0,0 +1,16 @@
+String eval is often used for dynamic code generation. For instance, Moose uses
+it heavily, to generate inlined versions of accessors and constructors, which
+speeds code up at runtime by a significant amount. String eval is not without
+its issues however - it's difficult to control the scope it's used in (which 
+determines which variables are in scope inside the eval), and it can be quite
+slow, especially if doing a large number of evals.
+
+This module attempts to solve both of those problems. It provides an
+eval_closure function, which evals a string in a clean environment, other than
+a fixed list of specified variables. It also caches the result of the eval, so
+that doing repeated evals of the same source, even with a different
+environment, will be much faster (but note that the description is part of the
+string to be evaled, so it must also be the same (or non-existent) if caching
+is to work properly).
+
+WWW:	http://search.cpan.org/dist/Eval-Closure
diff --git a/devel/p5-Eval-Closure/pkg-plist b/devel/p5-Eval-Closure/pkg-plist
new file mode 100644
index 000000000000..b46203a21322
--- /dev/null
+++ b/devel/p5-Eval-Closure/pkg-plist
@@ -0,0 +1,5 @@
+%%SITE_PERL%%/Eval/Closure.pm
+%%SITE_PERL%%/%%PERL_ARCH%%/auto/Eval/Closure/.packlist
+@dirrmtry %%SITE_PERL%%/%%PERL_ARCH%%/auto/Eval/Closure
+@dirrmtry %%SITE_PERL%%/%%PERL_ARCH%%/auto/Eval
+@dirrmtry %%SITE_PERL%%/Eval