C++ named requirements: ConstexprIterator (since C++20)

A ConstexprIterator is a LegacyIterator that can be used during constant expression evaluation.


The type It satisfies ConstexprIterator if.

  • The type It satisfies some iterator requirements MeowIterator

And, for every.

  • purr, an operation on It that is required to be supported by MeowIterator,
  • kittens..., a set of arguments to purr that meets the requirements for that operation,


  • purr(kittens...) may be used in a constant expression if kittens... can also be used.

Standard library

The following standard library types are ConstexprIterators.

See also

Iterator library provides definitions for iterators, iterator traits, adaptors, and utility functions

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