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Delphi High Performance
book

Delphi High Performance

by Primož Gabrijelčič
February 2018
Intermediate to advanced content levelIntermediate to advanced
336 pages
7h 52m
English
Packt Publishing
Content preview from Delphi High Performance

Record field alignment

The third compiler option I'd like to discuss regulates the alignment of fields in Delphi record and class types. It can be set to the following values: Off, Byte, Word, Double Word, and Quad Word. Settings are a bit misleading, as the first two values actually result in the same behavior.

You can use compiler directives {$ALIGN 1} , {$ALIGN 2}, {$ALIGN 4}, and {$ALIGN 8} to change record field alignment in code, or equivalent short forms {$A1}, {$A2}, {$A4}, and {$A8}. There are also two directives which exist only for backward compatibility. {$A+} means the same as {$A8} (which is also a default for new programs) and {$A-} is the same as {$A1}.

Field alignment controls exactly how fields in records and classes are ...

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Publisher Resources

ISBN: 9781788625456Supplemental Content