rpic-core — engine for the pic picture-drawing language.
Pipeline: source → [lexer] → [parser] → [ast] → [eval] → placed
primitives ([ir]) → render backends ([svg], later PNG/PDF). This crate
is pure (no file I/O); the CLI and WASM wrappers drive it.
Note: [eval] is the pic-language interpreter — a safe walker over a typed
expression/geometry tree. It executes no arbitrary code.