ExtUtils::Typemaps::OutputMap - Entry in the OUTPUT section of a typemap
use ExtUtils::Typemaps; ... my $output = $typemap->get_output_map('T_NV'); my $code = $output->code(); $output->code("...");
Perl Programmers Reference Guide ExtUtils::Typemaps::OutputMap(3) 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) ATTRIBUTES See attributes(7) for descriptions of the following attributes: +---------------+-----------------------+ |ATTRIBUTE TYPE | ATTRIBUTE VALUE | +---------------+-----------------------+ |Availability | runtime/perl-532 | +---------------+-----------------------+ |Stability | Pass-through volatile | +---------------+-----------------------+ SEE ALSO ExtUtils::Typemaps 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. NOTES Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source- code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from http://www.cpan.org/src/5.0/perl-5.32.0.tar.gz. Further information about this software can be found on the open source community website at https://www.perl.org/. perl v5.32.0 2020-06-14 ExtUtils::Typemaps::OutputMap(3)