Profile of Perl/Critic/Policy/ValuesAndExpressions/ProhibitLongChainsOfMethodCalls.pm

Filename	/Users/timbo/perl5/perlbrew/perls/perl-5.18.2/lib/site_perl/5.18.2/Perl/Critic/Policy/ValuesAndExpressions/ProhibitLongChainsOfMethodCalls.pm
Statements	Executed 19 statements in 462µs

Subroutines
Calls	P	F	Exclusive Time	Inclusive Time	Subroutine
1	1	1	16µs	16µs	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@10
1	1	1	10µs	334µs	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@15
1	1	1	8µs	29µs	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@16
1	1	1	7µs	28µs	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@13
1	1	1	7µs	11µs	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@12
1	1	1	7µs	57µs	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@18
1	1	1	7µs	18µs	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@11
1	1	1	6µs	7µs	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::default_severity
1	1	1	5µs	5µs	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::supported_parameters
0	0	0	0s	0s	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::_max_chain_length
0	0	0	0s	0s	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::applies_to
0	0	0	0s	0s	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::default_themes
0	0	0	0s	0s	Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::violates

Call graph for these subroutines as a Graphviz dot language file.

Line	State ments	Time on line	Calls	Time in subs	Code
1					##############################################################################
2					# $URL$
3					# $Date$
4					# $Author$
5					# $Revision$
6					##############################################################################
7
8					package Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls;
9
10	2	40µs	1	16µs	# spent 16µs within Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@10 which was called: # once (16µs+0s) by Module::Pluggable::Object::_require at line 10 use 5.006001; # spent 16µs making 1 call to Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@10
11	2	20µs	2	29µs	# spent 18µs (7+11) within Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@11 which was called: # once (7µs+11µs) by Module::Pluggable::Object::_require at line 11 use strict; # spent 18µs making 1 call to Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@11 # spent 11µs making 1 call to strict::import
12	2	19µs	2	14µs	# spent 11µs (7+4) within Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@12 which was called: # once (7µs+4µs) by Module::Pluggable::Object::_require at line 12 use warnings; # spent 11µs making 1 call to Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@12 # spent 4µs making 1 call to warnings::import
13	2	26µs	2	49µs	# spent 28µs (7+21) within Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@13 which was called: # once (7µs+21µs) by Module::Pluggable::Object::_require at line 13 use Readonly; # spent 28µs making 1 call to Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@13 # spent 21µs making 1 call to Exporter::import
14
15	2	25µs	2	657µs	# spent 334µs (10+323) within Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@15 which was called: # once (10µs+323µs) by Module::Pluggable::Object::_require at line 15 use Perl::Critic::Utils qw{ :characters :severities }; # spent 334µs making 1 call to Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@15 # spent 323µs making 1 call to Exporter::import
16	2	25µs	2	49µs	# spent 29µs (8+20) within Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@16 which was called: # once (8µs+20µs) by Module::Pluggable::Object::_require at line 16 use Perl::Critic::Utils::PPI qw{ is_ppi_expression_or_generic_statement }; # spent 29µs making 1 call to Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@16 # spent 20µs making 1 call to Exporter::import
17
18	2	292µs	2	106µs	# spent 57µs (7+50) within Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@18 which was called: # once (7µs+50µs) by Module::Pluggable::Object::_require at line 18 use base 'Perl::Critic::Policy'; # spent 57µs making 1 call to Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::BEGIN@18 # spent 50µs making 1 call to base::import
19
20	1	600ns			our $VERSION = '1.121';
21
22					#-----------------------------------------------------------------------------
23
24	1	2µs	1	29µs	Readonly::Scalar my $EXPL => # spent 29µs making 1 call to Readonly::Scalar
25					q{Long chains of method calls indicate code that is too tightly coupled};
26
27					#-----------------------------------------------------------------------------
28
29					# spent 5µs within Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::supported_parameters which was called: # once (5µs+0s) by Perl::Critic::Policy::new at line 88 of Perl/Critic/Policy.pm sub supported_parameters {
30					return (
31					{
32	1	8µs			name => 'max_chain_length',
33					description => 'The number of chained calls to allow.',
34					default_string => '3',
35					behavior => 'integer',
36					integer_minimum => 1,
37					},
38					);
39					}
40
41	1	2µs			# spent 7µs (6+1) within Perl::Critic::Policy::ValuesAndExpressions::ProhibitLongChainsOfMethodCalls::default_severity which was called: # once (6µs+1µs) by Perl::Critic::Policy::get_severity at line 331 of Perl/Critic/Policy.pm sub default_severity { return $SEVERITY_LOW }
42					sub default_themes { return qw( core maintenance ) }
43					sub applies_to { return qw{ PPI::Statement }; }
44
45					#-----------------------------------------------------------------------------
46
47					sub _max_chain_length {
48					my ( $self ) = @_;
49
50					return $self->{_max_chain_length};
51					}
52
53					#-----------------------------------------------------------------------------
54
55					sub violates {
56					my ( $self, $elem, undef ) = @_;
57
58					return if not is_ppi_expression_or_generic_statement($elem);
59
60					my $chain_length = 0;
61					my $max_chain_length = $self->_max_chain_length();
62					my @children = $elem->schildren();
63					my $child = shift @children;
64
65					while ($child) {
66					# if it looks like we've got a subroutine call, drop the parameter
67					# list.
68					if (
69					$child->isa('PPI::Token::Word')
70					and @children
71					and $children[0]->isa('PPI::Structure::List')
72					) {
73					shift @children;
74					}
75
76					if (
77					$child->isa('PPI::Token::Word')
78					or $child->isa('PPI::Token::Symbol')
79					) {
80					if ( @children ) {
81					if ( $children[0]->isa('PPI::Token::Operator') ) {
82					if ( q{->} eq $children[0]->content() ) {
83					$chain_length++;
84					shift @children;
85					}
86					}
87					elsif ( not $children[0]->isa('PPI::Token::Structure') ) {
88					$chain_length = 0;
89					}
90					}
91					}
92					else {
93					if ($chain_length > $max_chain_length) {
94					return
95					$self->violation(
96					"Found method-call chain of length $chain_length.",
97					$EXPL,
98					$elem,
99					);
100					}
101
102					$chain_length = 0;
103					}
104
105					$child = shift @children;
106					}
107
108					if ($chain_length > $max_chain_length) {
109					return
110					$self->violation(
111					"Found method-call chain of length $chain_length.",
112					$EXPL,
113					$elem,
114					);
115					}
116
117					return;
118					}
119
120
121	1	3µs			1;
122
123					__END__