LATER -- a hypertext element for lazy evaluation

Synopsis

Usage:

LATER {f}
Inputs:
- f, a function
Outputs:
- an instance of the type LATER

Description

When the resulting hypertext element is processed later for conversion to html or for printing, the function f will be evaluated (with no arguments) and the hypertext it returns will be formatted.

i1 : f = () -> DIV { "hi there" }

o1 = f

o1 : FunctionClosure

i2 : LATER {f}

o2 = hi there

o2 : LATER

i3 : peek oo

o3 = LATER{f}

For the programmer

The object LATER is an intermediate markup type, with ancestor classes Hypertext < BasicList < Thing.