22 General utilities library [utilities]

The header provides partial specializations of move_only_function for each combination of the possible replacements of the placeholders cv, ref, and noex where

• (1.1)
  cv is either const or empty,
• (1.2)
  ref is either &, &&, or empty, and
• (1.3)
  noex is either true or false.

For each of the possible combinations of the placeholders mentioned above, there is a placeholder inv-quals defined as follows:

• (2.1)
  If ref is empty, let inv-quals be cv&,
• (2.2)
  otherwise, let inv-quals be cv ref.