TAL Reference Manual

Structures
TAL Reference Manual—526371-001
8-23
Example of Referral Substructure Declaration
Example of Referral Substructure Declaration
This example declares a referral substructure redefinition that uses a template
structure layout:
STRUCT temp(*); !Declare template structure
BEGIN
STRING a[0:2];
INT b;
STRING c;
END;
STRUCT .ind_struct; !Declare definition structure
BEGIN
INT header[0:1];
STRING abyte;
STRUCT abc (temp) [0:1]; !Declare ABC
STRUCT xyz (temp) [0:1] = abc;
!Redefine ABC as XYZ
END;
Simple Pointer Redefinition
A simple pointer redefinition associates a new simple pointer with a previous item at
the same BEGIN-END level of a structure.
type
is any data type except UNSIGNED. The data type determines how much data the
simple pointer can access at a time—a byte, word, doubleword, or quadrupleword.
. (period)
is the standard indirection symbol and denotes a standard (16-bit) pointer.
.EXT
is the extended indirection symbol and denotes an extended (32-bit) pointer.
identifier
is the identifier of the new simple pointer.
previous-identifier
is the identifier of a simple variable, array, substructure, or pointer previously
declared in the same structure. No index is allowed with this identifier.
VST0815.vsd
type
identifier
.
=
. EXT
previous-
identifier
;