ExtUtils::Typemaps::OutputMap(3pePerl Programmers Reference GExtUtils::Typemaps::OutputMap(3perl)



NAME
       ExtUtils::Typemaps::OutputMap - Entry in the OUTPUT section of a typemap

SYNOPSIS
         use ExtUtils::Typemaps;
         ...
         my $output = $typemap->get_output_map('T_NV');
         my $code = $output->code();
         $output->code("...");

DESCRIPTION
       Refer to ExtUtils::Typemaps for details.

METHODS
   new
       Requires "xstype" and "code" parameters.

   code
       Returns or sets the OUTPUT mapping code for this entry.

   xstype
       Returns the name of the XS type of the OUTPUT map.

   cleaned_code
       Returns a cleaned-up copy of the code to which certain transformations have been applied
       to make it more ANSI compliant.

   targetable
       This is an obscure but effective optimization that used to live in "ExtUtils::ParseXS"
       directly. Not implementing it should never result in incorrect use of typemaps, just less
       efficient code.

       In a nutshell, this will check whether the output code involves calling "sv_setiv",
       "sv_setuv", "sv_setnv", "sv_setpv" or "sv_setpvn" to set the special $arg placeholder to a
       new value AT THE END OF THE OUTPUT CODE. If that is the case, the code is eligible for
       using the "TARG"-related macros to optimize this.  Thus the name of the method:
       "targetable".

       If this optimization is applicable, "ExtUtils::ParseXS" will emit a "dXSTARG;" definition
       at the start of the generate XSUB code, and type (see below) dependent code to set "TARG"
       and push it on the stack at the end of the generated XSUB code.

       If the optimization can not be applied, this returns undef.  If it can be applied, this
       method returns a hash reference containing the following information:

         type:      Any of the characters i, u, n, p
         with_size: Bool indicating whether this is the sv_setpvn variant
         what:      The code that actually evaluates to the output scalar
         what_size: If "with_size", this has the string length (as code,
                    not constant, including leading comma)

SEE ALSO
       ExtUtils::Typemaps

AUTHOR
       Steffen Mueller "<smueller AT cpan.org">

COPYRIGHT & LICENSE
       Copyright 2009, 2010, 2011, 2012 Steffen Mueller

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



perl v5.20.2                                2014-12-27       ExtUtils::Typemaps::OutputMap(3perl)