20 General utilities library [utilities]

20.14 Function objects [function.objects]

20.14.11 Bitwise operations [bitwise.operations]

20.14.11.1 General [bitwise.operations.general]

The library provides basic function object classes for all of the bitwise operators in the language ([expr.bit.and], [expr.or], [expr.xor], [expr.unary.op]).