Perl::Critic::Policy::BuiltinFunctions::ProhibitStringyEUser3Contributed Perl DocumePerl::Critic::Policy::BuiltinFunctions::ProhibitStringyEval(3)

NAME

       Perl::Critic::Policy::BuiltinFunctions::ProhibitStringyEval - Write "eval { my $foo; bar($foo) }" instead of "eval "my $foo; bar($foo);"".

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       The string form of "eval" is recompiled every time it is executed, whereas the block form is only compiled once.  Also, the string form
       doesn't give compile-time warnings.

	   eval "print $foo";	     # not ok
	   eval {print $foo};	     # ok

CONFIGURATION

       There is an "allow_includes" boolean option for this Policy.  If set, then strings that look like they only include a single "use" or
       "require" statement (with the possible following statement that consists of a single number) are allowed.  With this option set, the
       following are flagged as indicated:

	   eval 'use Foo';	       # ok
	   eval 'require Foo';	       # ok
	   eval "use $thingy;";        # ok
	   eval "require $thingy;";    # ok
	   eval "use $thingy; 1;";     # ok
	   eval "require $thingy; 1;"; # ok

	   eval 'use Foo; blah;';      # still not ok
	   eval 'require Foo; 2; 1;';  # still not ok
	   eval 'use $thingy;';        # still not ok
	   eval 'no Foo';	       # still not ok

       If you don't understand why the number is allowed, see Perl::Critic::Policy::ErrorHandling::RequireCheckingReturnValueOfEval.

       This option inspired by Ricardo SIGNES' Perl::Critic::Policy::Lax::ProhibitStringyEval::ExceptForRequire.

SEE ALSO

       Perl::Critic::Policy::ControlStrucutres::RequireBlockGrep

       Perl::Critic::Policy::ControlStrucutres::RequireBlockMap

AUTHOR

       Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>

COPYRIGHT

       Copyright (c) 2005-2011 Imaginative Software Systems.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The full text of this license
       can be found in the LICENSE file included with this module.

perl v5.16.3							    2014-06-09	    Perl::Critic::Policy::BuiltinFunctions::ProhibitStringyEval(3)