Type Alias LispValue

LispValue:
    | Cons
    | InterpretedSymbol
    | Table
    | HashTable
    | Vector
    | number
    | bigint
    | Rational
    | string
    | null

Union of every value the interpreter can store or evaluate.

Cons — pairs and lists (including Cons.nil)
InterpretedSymbol — interned Lisp symbols
Table — environment frame (internal use)
HashTable — mutable hash table (make-hash-table)
Vector — mutable one-dimensional vector (vector / make-array)
bigint — integers (arbitrary precision)
Rational — exact ratios of integers
number — double-precision floats
string — string atoms
null — internal sentinel, distinct from Lisp nil (which is Cons.nil)