@inhuman.tools/arrival-syntax

Span-preserving Scheme s-expression forest. This is the syntax tree, not the evaluator.

parseSexprs answers “what did the user write, and where?” Arrival’s Parser answers “what does this program mean?” — it expands reader macros into APair / AVector / interned ASymbol and drops comments. Editors, the type-lens, and the sugarcoat round-trip need the first tree.

import { parseSexprs } from "@inhuman.tools/arrival-syntax";

parseSexprs("(map f xs) ; trailing");
// [{ list: [{ atom: "map" }, { atom: "f" }, { atom: "xs" }], span: [0, 10], trail: ["; trailing"] }]

[] and {} are containers (open: "[" | "{"), not atom glue. Racket #:limit mints as :limit. A ; comment on its own line before a datum is that datum’s lead; one on the same line after is its trail.

@inhuman.tools/arrival-sugarcoat re-exports parseSexprs / Node and owns the Scheme↔sugarcoat lens on top. @inhuman.tools/arrival’s type-layer and @inhuman.tools/arrival-types-bridge import this package directly.

Install

pnpm add @inhuman.tools/arrival-syntax

License

MIT.