[fpc-pascal] Using for-loop index variable after loop
juha.manninen62 at gmail.com
Mon Oct 10 12:16:13 CEST 2016
I have always avoided using a for-loop index variable after the loop.
I thought its value can be unpredictable in some situations when the
compiler reuses its register or memory etc.
I noticed the ActionListEditor in Lazarus sources has code that uses
it after the loop.
The compiler, FPC 3.0, does not warn about it.
I made a small test:
for i := 0 to 5 do
WriteLn('iii ', i);
Write('After loop i=', i);
if i = 5 then
WriteLn(' as expected')
WriteLn(' which is unpredictable');
Indeed, no warning!
Is it OK to do that? Have I misunderstood it?
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