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On 12/10/25 8:04 PM, Barbara Morris wrote:
It's a single pass through the source but it gathers information that it
can use multiple times.
The compiler usually allows forward-referencing, so you can code LIKE(x)
where x is defined later.
Interesting. But note my exact words: "pure single-pass." As in
compiling directly from source to executable in a single pass.
Pascal is pure single-pass. Forward-referencing is explicitly prohibited
except for *very* limited circumstances, involving an *explicit*
declaration as such.
Then again, when he designed Pascal (purely as a teaching language for
structured programming), Niklaus Wirth had some really stupid ideas in
his head. Like the notion that a FOR loop will always run to completion
under normal circumstances (even though it's trivially simple to come up
with cases in which FOR is the preferred loop construct, premature exit
is the norm, and completion is the exception).
--
JHHL
--
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