booleanx
May '09

Hi,

Can anybody tell me what I can assume when using iterator to set/map and performing --it when it is set to begin() of container ?
I've tested it and it seems that on set it works proper (it becomes end()), but on map it stays at begin() ..

Any comments anybody ? Is behavior in this case somehow specified or it depends on compiler ? And what about case when I have it pointing to end() ?

--
booleanx

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    May '09

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    May '09
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8 days later
bbi5291
May '09

The standards don't specify a behaviour if you decrement a begin iterator or increment an end iterator. In other words, the behaviour is undefined. Possibilities include: staying at begin(), changing to end(), giving an invalid iterator, throwing SIGABRT or something similar. Just don't do it.

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