sim-codec-typescript

Bounded, lossless TypeScript 7.0.2 and TSX syntax layered downstream of sim-codec-javascript. ECMAScript productions retain the JavaScript frontend's public node and token types; this crate adds TypeScript declarations, annotations, type nodes, modifiers, and JSX metadata without checker, compiler, project, or TypeScript runtime behavior.

parse_module selects TypeScript notation and parse_tsx additionally admits JSX. Both retain exact source, trivia, byte locations, and parser context.

lower_typescript erases only syntax requiring no compiler decision and builds the resulting javascript/* graph directly through JavascriptBuilder. It retains annotation references and complete derivation origins. Checker-dependent assertions and satisfies, code-producing enums and namespaces, parameter properties, decorators, and JSX/TSX transforms remain lossless, located EvaluationGap values. The plain, located, and tree decode lanes share this firewall; encoding uses canonical JavaScript-compatible text or the established tagged expression fallback, without emit-and-reparse.