For.FCreate a new t, replacing all values of the given functor by given a value of 'a.
Create a new t, replacing all values in the given functor by unit.
module Infix : 
  Preface_specs.Indexed_functor.INFIX
    with type ('a, 'index) t := ('a, 'index) tInfix version of CORE.map.
Flipped and infix version of CORE.map.
Flipped and infix version of OPERATION.replace.
module Syntax : 
  Preface_specs.Indexed_functor.SYNTAX
    with type ('a, 'index) t := ('a, 'index) t