NAME
    Module::XSOrPP - Determine if an installed module is XS or pure-perl

VERSION
    This document describes version 0.120 of Module::XSOrPP (from Perl
    distribution Module-XSOrPP), released on 2023-07-09.

SYNOPSIS
     use Module::XSOrPP qw(
         is_xs is_pp xs_or_pp
     );

     say "Class::XSAccessor is an XS module" if is_xs("Class/XSAccessor.pm");
     say "JSON::PP is a pure-Perl module" if is_pp("JSON::PP");
     say "Params::Util is an XS module with PP fallback" if xs_or_pp("Class/XSAccessor.pm") =~ /^(xs|xs_or_pp)$/;

DESCRIPTION
FUNCTIONS
  xs_or_pp($mod, \%opts) => str
    Return either "xs", "pp", or "xs_or_pp" (XS with a PP fallback). Return
    undef if can't determine which. $mod value can be in the form of
    "Package/SubPkg.pm" or "Package::SubPkg". The following ways are tried,
    in order:

    *   Predetermined list

        Some CPAN modules are XS with a PP fallback. This module maintains
        the list.

    *   Looking at the ".packlist"

        If a .{bs,so,dll} file is listed in the ".packlist", then it is
        assumed to be an XS module. This method will fail if there is no
        ".packlist" available (e.g. core or uninstalled or when the package
        management strips the packlist), or if a dist contains both
        pure-Perl and XS.

    *   Looking at the source file for usage of "XSLoader" or "DynaLoader"

        If the module source code has something like "use XSLoader;" or <use
        DynaLoader;> then it is assumed to be an XS module. This is
        currently implemented using a simple regex, so it is somewhat
        brittle.

    *   Guessing from the name

        If the module has "XS" in its name then it's assumed to be an XS
        module. If the module has "PP" in its name, it's assumed to be a
        pure-Perl module.

        Known false positives will be prevented in the future.

    Other methods will be added in the future (e.g. a database like in
    Module::CoreList, consulting MetaCPAN, etc).

    Options:

    *   warn => BOOL (default: 0)

        If set to true, will warn to STDERR if fail to determine.

    *   debug => BOOL (default: 0)

        If set to true will print debugging message to STDERR.

  is_xs($mod, \%opts) => BOOL
    Return true if module $mod is an XS module, false if a pure Perl module,
    or undef if can't determine either. See "xs_or_pp" for more details.

  is_pp($mod, \%opts) => BOOL
    Return true if module $mod is a pure Perl module or XS module with a PP
    fallback. See "is_xs" for more details. See "xs_or_pp" for more details.

HOMEPAGE
    Please visit the project's homepage at
    <https://metacpan.org/release/Module-XSOrPP>.

SOURCE
    Source repository is at
    <https://github.com/perlancar/perl-Module-XSOrPP>.

AUTHOR
    perlancar <perlancar@cpan.org>

CONTRIBUTOR
    Steven Haryanto <stevenharyanto@gmail.com>

CONTRIBUTING
    To contribute, you can send patches by email/via RT, or send pull
    requests on GitHub.

    Most of the time, you don't need to build the distribution yourself. You
    can simply modify the code, then test via:

     % prove -l

    If you want to build the distribution (e.g. to try to install it locally
    on your system), you can install Dist::Zilla,
    Dist::Zilla::PluginBundle::Author::PERLANCAR,
    Pod::Weaver::PluginBundle::Author::PERLANCAR, and sometimes one or two
    other Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps
    required beyond that are considered a bug and can be reported to me.

COPYRIGHT AND LICENSE
    This software is copyright (c) 2023, 2016, 2015, 2014 by perlancar
    <perlancar@cpan.org>.

    This is free software; you can redistribute it and/or modify it under
    the same terms as the Perl 5 programming language system itself.

BUGS
    Please report any bugs or feature requests on the bugtracker website
    <https://rt.cpan.org/Public/Dist/Display.html?Name=Module-XSOrPP>

    When submitting a bug or request, please include a test-file or a patch
    to an existing test-file that illustrates the bug or desired feature.