# WrapperType -- a class of lists with abbreviated constructors

## Description

These are the types X of lists that can be constructed by expressions of the form X {a,b,c,...}, or, for lists of length one, by an expression of the form X a. They also act on sequences.

 i1 : X = new WrapperType of BasicList o1 = X o1 : WrapperType i2 : X {a,b,c} o2 = X{a, b, c} o2 : X i3 : X a o3 = X{a} o3 : X