@
Get the value of a global variable in state
Examples:
(+ (@ y) 1)
(assign a (aset1 'ascii-map-array (@ a) 66 'Upper-case-B))
General Form:
(@ symbol)
where symbol is any symbol to which you have assigned a global
value. This macro expands into (f-get-global 'symbol state), which
retrieves the stored value of the symbol.
The macro f-get-global is closely related to @: (@ var)
macroexpands to (f-get-global 'var state).
The macro assign makes it convenient to set the value of a symbol.
The :ubt operation has no effect on the global-table of
state. Thus, you may use these globals to hang onto useful data
structures even though you may undo back past where you computed and saved
them.
