Types

Section: User Contributed Perl Documentation (3)
Updated: 2002-04-08
Index
Return to Main Contents

NAME

PDL::Types - define fundamental PDL Datatypes

SYNOPSIS

 use PDL::Types;

 $pdl = ushort( 2.0, 3.0 );
 print "The actual c type used to store ushort's is '" .
    $pdl->type->realctype() . "'\n";
 The actual c type used to store ushort's is 'unsigned short'

DESCRIPTION

Internal module - holds all the PDL Type info. This can be accessed using the "PDL::Type" object returned by the type method.

OBJECTS

This module declares one class - "PDL::Type" - objects of this class are returned by the type method of a piddle. It has several methods, listed below, which provide an easy way to access type information:

Additionally, comparison and stringification are overloaded so that you can compare and print type objects, e.g.

  $nofloat = 1 if $pdl->type < float;
  die "must be double" if $type != double;

For further examples check again the type method.

enum: Returns the number representing this datatype (see get_datatype).
symbol: Returns one of 'PDL_B', 'PDL_S', 'PDL_US', 'PDL_L', 'PDL_F' or 'PDL_D'.
ctype: Returns the macro used to represent this type in C code (eg 'PDL_Long').
ppsym: The letter used to represent this type in PP code code (eg 'U' for ushort).
realctype: The actual C type used to store this type.
shortctype: The value returned by "ctype" without the 'PDL_'.

This document was created by man2html, using the manual pages.
Time: 10:56:47 GMT, April 20, 2024