Big-picture pipeline:

(Done) Step 1: lalrpop

&'input str -> AST

(In-progress) Step 2: re-parser? resolver?

AST -> refined AST

• Remove all string keys, only number (no more string hashes) (do we need this?)
• Escape all strings (Could be done in step1?)
• Outputs list (map?) of modules, variables, functions, items

(Planned) Step 3: Interpreter

refined AST -> simplified CSG tree

• No more variables, only values
• No more user modules, only primitives and base CSG operations

(Considered) Step 4: Render

CSG tree -> polygons/triangle mesh

• Rasterize curves with given precision ($fn)
• Actually use CGAL or other library to compute the final geometry

(Considered) Step 5: Export

geometry -> STL/AMF/3MF file