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NAME
    ExtUtils::ParseXS - converts Perl XS code into C code

SYNOPSIS
      use ExtUtils::ParseXS;

      my $pxs = ExtUtils::ParseXS->new;
      $pxs->process_file( filename => 'foo.xs' );

      $pxs->process_file( filename => 'foo.xs',
                          output => 'bar.c',
                          'C++' => 1,
                          typemap => 'path/to/typemap',
                          hiertype => 1,
                          except => 1,
                          versioncheck => 1,
                          linenumbers => 1,
                          optimize => 1,
                          prototypes => 1,
                        );
  
      # Legacy non-OO interface using a singleton:
      use ExtUtils::ParseXS qw(process_file);
      process_file( filename => 'foo.xs' );

DESCRIPTION
    "ExtUtils::ParseXS" will compile XS code into C code by embedding the
    constructs necessary to let C functions manipulate Perl values and
    creates the glue necessary to let Perl access those functions. The
    compiler uses typemaps to determine how to map C function parameters and
    variables to Perl values.

    The compiler will search for typemap files called *typemap*. It will use
    the following search path to find default typemaps, with the rightmost
    typemap taking precedence.

        ../../../typemap:../../typemap:../typemap:typemap

EXPORT
    None by default. "process_file()" and/or "report_error_count()" may be
    exported upon request. Using the functional interface is discouraged.

METHODS
    $pxs->new()
        Returns a new, empty XS parser/compiler object.

    $pxs->process_file()
        This method processes an XS file and sends output to a C file. The
        method may be called as a function (this is the legacy interface)
        and will then use a singleton as invocant.

        Named parameters control how the processing is done. The following
        parameters are accepted:

        C++ Adds "extern "C"" to the C code. Default is false.

        hiertype
            Retains "::" in type names so that C++ hierarchical types can be
            mapped. Default is false.

        except
            Adds exception handling stubs to the C code. Default is false.

        typemap
            Indicates that a user-supplied typemap should take precedence
            over the default typemaps. A single typemap may be specified as
            a string, or multiple typemaps can be specified in an array
            reference, with the last typemap having the highest precedence.

        prototypes
            Generates prototype code for all xsubs. Default is false.

        versioncheck
            Makes sure at run time that the object file (derived from the
            ".xs" file) and the ".pm" files have the same version number.
            Default is true.

        linenumbers
            Adds "#line" directives to the C output so error messages will
            look like they came from the original XS file. Default is true.

        optimize
            Enables certain optimizations. The only optimization that is
            currently affected is the use of *target*s by the output C code
            (see perlguts). Not optimizing may significantly slow down the
            generated code, but this is the way xsubpp of 5.005 and earlier
            operated. Default is to optimize.

        inout
            Enable recognition of "IN", "OUT_LIST" and "INOUT_LIST"
            declarations. Default is true.

        argtypes
            Enable recognition of ANSI-like descriptions of function
            signature. Default is true.

        s   *Maintainer note:* I have no clue what this does. Strips
            function prefixes?

    $pxs->report_error_count()
        This method returns the number of [a certain kind of] errors
        encountered during processing of the XS file.

        The method may be called as a function (this is the legacy
        interface) and will then use a singleton as invocant.

AUTHOR
    Based on xsubpp code, written by Larry Wall.

    Maintained by:

    *   Ken Williams, <ken@mathforum.org>

    *   David Golden, <dagolden@cpan.org>

    *   James Keenan, <jkeenan@cpan.org>

    *   Steffen Mueller, <smueller@cpan.org>

COPYRIGHT
    Copyright 2002-2014 by Ken Williams, David Golden and other
    contributors. All rights reserved.

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

    Based on the "ExtUtils::xsubpp" code by Larry Wall and the Perl 5
    Porters, which was released under the same license terms.

SEE ALSO
    perl, ExtUtils::xsubpp, ExtUtils::MakeMaker, perlxs, perlxstut.

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