Annex B (normative) Implementation quantities [implimits]

Because computers are finite, C++ implementations are inevitably limited in the size of the programs they can successfully process.
Every implementation shall document those limitations where known.
This documentation may cite fixed limits where they exist, say how to compute variable limits as a function of available resources, or say that fixed limits do not exist or are unknown.
The limits may constrain quantities that include those described below or others.
The bracketed number following each quantity is recommended as the minimum for that quantity.
However, these quantities are only guidelines and do not determine compliance.