Optimization switch

[dseligo]

Is compiler switch

Code: Pascal  [Select][+][-]

1. {$O-}

same as

Code: Pascal  [Select][+][-]

1. {$OPTIMIZATION OFF}

?

Documentation here doesn't mention it: https://www.freepascal.org/docs-html/prog/progsu58.html#x65-640001.2.58

If it is, can it take all the values described in documentation?

[Thaddy]

Yes. Even a couple more. Most should only be of interest to highly capable programmers, though: you need some knowledge how optimization theory works...

[ASerge]

If it is, can it take all the values described in documentation?

From Introduction:
For long switches, the + or - character to switch the option on or off, may be replaced by the ON or OFF keywords.
Thus {$I+} is equivalent to {$IOCHECKS ON} or {$IOCHECKS +} and {$C-} is equivalent to {$ASSERTIONS OFF} or {$ASSERTIONS -}