pTAL Reference Manual (G06.24+, H06.09+, J06.03+)

also causes that precise order of memory references to be preserved, again, when code is

optimized.

STRING

is the STRING attribute.

INT

is the INT attribute.

Indirection

., .EXT, .EXT32, .EXT64, .SG, and .SGX are indirection symbols (see Table 14 (page 41)).

identifier

is the identifier of the new structure pointer.

referral

is the identifier of a structure that provides the structure layout. You can specify any previously

declared structure (including the encompassing structure) or structure pointer.

REFALIGNED

specifies the base alignment of the structures that the structure pointer will reference.

references a structure that might not be well-aligned.

indicates that the base of the structure and the fields in the structure are well aligned in memory

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.

The addressing mode and STRING or INT attribute determine the kind of addresses a structure

pointer can contain, as described in Table 47 (page 149).

Example 100 Structure Pointer Redefinition

STRUCT record;

BEGIN

FIXED data;

INT std_link_addr;

INT .std_link (record) = std_link_addr; ! Redefinition

INT(32) ext_link_addr;

INT .EXT ext_link (record) = ext_link_addr; ! Redefinition

END;

160 Structures