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|
package Perl::PrereqScanner::NotQuiteLite::Parser::Core;
use strict;
use warnings;
use Perl::PrereqScanner::NotQuiteLite::Util;
my %feature_since = (
say => '5.010',
state => '5.010',
switch => '5.010',
unicode_strings => '5.012',
current_sub => '5.016',
evalbytes => '5.016',
fc => '5.016',
arybase => '5.016',
unicode_eval => '5.016',
lexical_subs => '5.018',
postderef => '5.020',
postderef_qq => '5.020',
signatures => '5.020',
bitwise => '5.022',
refaliasing => '5.022',
declared_refs => '5.026',
);
sub register { return {
use => {
if => 'parse_if_args',
base => 'parse_base_args',
parent => 'parse_parent_args',
feature => 'parse_feature_args',
},
keyword => {
package => 'parse_package',
exit => 'parse_begin_exit',
},
}}
sub parse_if_args {
my ($class, $c, $used_module, $raw_tokens) = @_;
while(my $token = shift @$raw_tokens) {
last if $token->[1] eq 'COMMA';
}
my $tokens = convert_string_tokens($raw_tokens);
my $module = shift @$tokens;
if (ref $module and ($module->[1] eq 'WORD' or $module->[1] eq 'KEYWORD')) {
$module = $module->[0];
}
if (is_module_name($module)) {
if (is_version($tokens->[0])) {
my $version = shift @$tokens;
$c->add_recommendation($module => $version);
} else {
$c->add_recommendation($module => 0);
}
} else {
push @{$c->{errors}}, "use if module not found";
}
}
sub parse_base_args {
my ($class, $c, $used_module, $raw_tokens) = @_;
my $tokens = convert_string_tokens($raw_tokens);
if (is_version($tokens->[0])) {
$c->add($used_module => shift @$tokens);
}
while(my $token = shift @$tokens) {
my $module = $token;
if (ref $module and ($module->[1] || '') eq 'WORD') {
# allow bareword, but disallow function()
$module = $module->[0];
next if @$tokens and ref $tokens->[0] and ($tokens->[0][1] || '') eq '()';
}
# bareword in parentheses
if (ref $module and ref $module->[0]) {
$module = $module->[0][0];
}
if (is_module_name($module)) {
$c->add($module => 0);
}
}
}
sub parse_parent_args {
my ($class, $c, $used_module, $raw_tokens) = @_;
my $tokens = convert_string_tokens($raw_tokens);
if (is_version($tokens->[0])) {
$c->add($used_module => shift @$tokens);
}
while(my $token = shift @$tokens) {
last if $token eq '-norequire';
my $module = $token;
if (ref $token) {
last if $token->[0] eq '-norequire';
}
if (ref $module and ($module->[1] || '') eq 'WORD') {
# allow bareword, but disallow function()
$module = $module->[0];
next if @$tokens and ref $tokens->[0] and ($tokens->[0][1] || '') eq '()';
}
# bareword in parentheses
if (ref $module and ref $module->[0]) {
$module = $module->[0][0];
}
$c->add($module => 0) if is_module_name($module);
}
}
sub parse_feature_args {
my ($class, $c, $used_module, $raw_tokens) = @_;
$c->add_perl('5.010', 'feature');
my $tokens = convert_string_tokens($raw_tokens);
if (is_version($tokens->[0])) {
$c->add($used_module => shift @$tokens);
}
while(my $token = shift @$tokens) {
next if ref $token;
if (exists $feature_since{$token}) {
$c->add_perl($feature_since{$token} => "feature $token");
next;
}
if ($token =~ /^:5\.([0-9]+)(\.\[0-9]+)?/) {
my $version = sprintf '5.%03d', $1;
$c->add_perl($version, $token);
next;
}
}
}
sub parse_begin_exit {
my ($class, $c, $raw_tokens) = @_;
my @stack = @{$c->{stack} || []};
if (grep {$_->[0] eq '{' and $_->[2] eq 'BEGIN'} @stack) {
if (grep {$c->token_is_conditional($_->[0])} @$raw_tokens) {
$c->{force_cond} = 1;
} elsif (grep {$_->[0] eq '{' and $c->token_is_conditional($_->[2])} @stack) {
$c->{force_cond} = 1;
} else {
$c->{ended} = 1;
@{$c->{stack}} = ();
}
}
}
sub parse_package {
my ($class, $c, $raw_tokens) = @_;
my $tokens = convert_string_tokens($raw_tokens);
shift @$tokens; # drop "package"
my $token = shift @$tokens;
if (ref $token && $token->[1] && $token->[1] eq 'WORD') {
$c->add_package($token->[0]);
}
if (@$tokens) {
$token = shift @$tokens;
if (is_version($token)) {
$c->add_perl("5.012", "package PACKAGE VERSION");
$token = shift @$tokens;
}
if (ref $token && $token->[1] && $token->[1] =~ /^\{/) {
$c->add_perl("5.014", "package PACKAGE (VERSION) {}");
}
}
}
1;
__END__
=encoding utf-8
=head1 NAME
Perl::PrereqScanner::NotQuiteLite::Parser::Core
=head1 DESCRIPTION
This parser is to deal with module inheritance by C<base> and
C<parent> modules, and conditional loading by C<if> module.
=head1 AUTHOR
Kenichi Ishigaki, E<lt>ishigaki@cpan.orgE<gt>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2015 by Kenichi Ishigaki.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
