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ExtUtils::Typemaps::OutputMap(3pm)



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 generated 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(3)


AUTHOR

       Steffen Mueller "<smueller@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 v5.24.0                      2016-03-01ExtUtils::Typemaps::OutputMap(3pm)

perl 5.24 - Generated Sun Nov 13 07:06:11 CST 2016
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