1Sub::Identify(3)      User Contributed Perl Documentation     Sub::Identify(3)
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NAME

6       Sub::Identify - Retrieve names of code references
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SYNOPSIS

9           use Sub::Identify ':all';
10           my $subname = sub_name( $some_coderef );
11           my $packagename = stash_name( $some_coderef );
12           # or, to get all at once...
13           my $fully_qualified_name = sub_fullname( $some_coderef );
14           defined $subname
15               and say "this coderef points to sub $subname in package $packagename";
16           my ($file, $line) = get_code_location( $some_coderef );
17           $file
18               and say "this coderef is defined at line $line in file $file";
19           is_sub_constant( $some_coderef )
20               and say "this coderef points to a constant subroutine";
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DESCRIPTION

23       "Sub::Identify" allows you to retrieve the real name of code
24       references.
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26       It provides six functions, all of them taking a code reference.
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28       "sub_name" returns the name of the code reference passed as an argument
29       (or "__ANON__" if it's an anonymous code reference), "stash_name"
30       returns its package, and "sub_fullname" returns the concatenation of
31       the two.
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33       "get_code_info" returns a list of two elements, the package and the
34       subroutine name (in case of you want both and are worried by the
35       speed.)
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37       In case of subroutine aliasing, those functions always return the
38       original name.
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40       "get_code_location" returns a two-element list containing the file name
41       and the line number where the subroutine has been defined.
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43       "is_sub_constant" returns a boolean value indicating whether the
44       subroutine is a constant or not.
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46   Pure-Perl version
47       By default "Sub::Identify" tries to load an XS implementation of the
48       "get_code_info", "get_code_location" and (on perl versions 5.16.0 and
49       later) "is_sub_constant" functions, for speed; if that fails, or if the
50       environment variable "PERL_SUB_IDENTIFY_PP" is defined to a true value,
51       it will fall back to a pure perl implementation, that uses perl's
52       introspection mechanism, provided by the "B" module.
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SEE ALSO

55       Sub::Util, part of the module distribution Scalar::List::Utils since
56       version 1.40. Since this will be a core module starting with perl
57       5.22.0, it is encouraged to migrate to Sub::Util when possible.
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59       Sub::Name
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SOURCE

62       A git repository for the sources is at
63       <https://github.com/rgs/Sub-Identify>.
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LICENSE

66       (c) Rafael Garcia-Suarez (rgs at consttype dot org) 2005, 2008, 2012,
67       2014, 2015
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69       This program is free software; you may redistribute it and/or modify it
70       under the same terms as Perl itself.
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74perl v5.32.0                      2020-07-28                  Sub::Identify(3)
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