Module symbolic 

Symbolic-expression tree lens.

A symbolic expression is a SIM Expr (calls, symbols, numbers). The lens renders it as a scene/tree: each operator is a branch labelled by its head, each leaf an atom. It never evaluates the expression; it shows its structure.

Constants

SYMBOLIC_LENS

The symbolic lens id.

Functions

call

A small symbolic builder for tests and demos: (operator arg ...).

symbolic_tree

Render a symbolic expression as a scene/tree.