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Asked: 2026-05-31T22:05:51+00:00

This question got me thinking about the max_size method in vector class. It is

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This question got me thinking about the max_size method in vector class. It is quite apparent that practically the number of elements contained in the vector will be much lesser than what max_size returns. So I was wondering where this will be useful? Any clues?

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  1. Editorial Team

    It really isn’t very useful.

    The only theoretical usage would be to check that if you need a container larger than max_size(), you are in trouble. But you would probably realize that already when considering a port of your database server to a microwave oven.

    The committee once considered improving the function, but didn’t find it useful enough to be worth a change:

    max_size() isn’t useful for very many things, and the existing wording is sufficiently clear for the few cases that max_size() can be used for. None of the attempts to change the existing wording were an improvement.

    http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-closed.html#197

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