| Commit | Line | Data |
|---|---|---|
| 34167feb JRT |
1 | ################################################################## |
| 2 | # $URL$ | |
| 3 | # $Date$ | |
| 4 | # $Author$ | |
| 5 | # $Revision$ | |
| 6 | ################################################################## | |
| 7 | ||
| 59b05e08 JRT |
8 | package Perl::Critic::Policy::BuiltinFunctions::ProhibitStringyEval; |
| 9 | ||
| 10 | use strict; | |
| 11 | use warnings; | |
| 12 | use Perl::Critic::Utils; | |
| 13 | use Perl::Critic::Violation; | |
| 14 | use base 'Perl::Critic::Policy'; | |
| 15 | ||
| 16 | our $VERSION = '0.13'; | |
| 17 | $VERSION = eval $VERSION; ## no critic | |
| 18 | ||
| 19 | my $desc = q{Expression form of 'eval'}; | |
| 20 | my $expl = [161]; | |
| 21 | ||
| 22 | #---------------------------------------------------------------------------- | |
| 23 | ||
| 24 | sub violates { | |
| 25 | my ( $self, $elem, $doc ) = @_; | |
| 26 | $elem->isa('PPI::Token::Word') && $elem eq 'eval' || return; | |
| 27 | return if is_hash_key($elem); | |
| 28 | ||
| 29 | my $sib = $elem->snext_sibling() || return; | |
| 30 | my $arg = $sib->isa('PPI::Structure::List') ? $sib->schild(0) : $sib; | |
| 31 | return if !$arg || $arg->isa('PPI::Structure::Block'); | |
| 32 | ||
| 33 | #Must not be a block | |
| 34 | return Perl::Critic::Violation->new( $desc, $expl, $elem->location() ); | |
| 35 | } | |
| 36 | ||
| 37 | ||
| 38 | 1; | |
| 39 | ||
| 40 | __END__ | |
| 41 | ||
| 42 | =head1 NAME | |
| 43 | ||
| 44 | Perl::Critic::Policy::BuiltinFunctions::ProhibitStringyEval | |
| 45 | ||
| 46 | =head1 DESCRIPTION | |
| 47 | ||
| 48 | The string form of eval is recompiled every time it is executed, | |
| 49 | whereas the block form is only compiled once. Also, the string form | |
| 50 | doesn't give compile-time warnings. | |
| 51 | ||
| 52 | eval "print $foo"; #not ok | |
| 53 | eval {print $foo}; #ok | |
| 54 | ||
| 55 | =head1 SEE ALSO | |
| 56 | ||
| 57 | L<Perl::Critic::Policy::ControlStrucutres::ProhibitStringyGrep> | |
| 58 | ||
| 59 | L<Perl::Critic::Policy::ControlStrucutres::ProhibitStringyMap> | |
| 60 | ||
| 61 | =head1 AUTHOR | |
| 62 | ||
| 63 | Jeffrey Ryan Thalhammer <thaljef@cpan.org> | |
| 64 | ||
| 65 | Copyright (c) 2005 Jeffrey Ryan Thalhammer. All rights reserved. | |
| 66 | ||
| 67 | This program is free software; you can redistribute it and/or modify | |
| 68 | it under the same terms as Perl itself. The full text of this license | |
| 69 | can be found in the LICENSE file included with this module. |