Improve interpreted Test262 parity for Array and String by nickna · Pull Request #1319 · nickna/SharpTS

nickna · Jul 28, 2026

Summary

generalize Array.prototype receivers and preserve callback receiver identity
surface guest TypeErrors for invalid Array callbacks and distinguish arguments objects from arrays
implement JavaScript coercion and optional-argument semantics across String character, search, padding, normalization, and code-point methods

focused cross-mode Test262 parity pins: 49 passing cases across the five batches
nearby SharpTS tests: Array batch 197/197; arguments batch 199/199; String batches 167/167
complete interpreted Test262 baseline sweep: 11,384 cases, 515 new passes, 0 regressions

Part of #1279.

nickna added 5 commits July 28, 2026 03:14

fix(interp): generalize array prototype receivers

14ac7f7

fix(interp): throw guest errors for array callbacks

bf30e36

fix(interp): distinguish arguments from arrays

da6afd3

fix(interp): coerce string method arguments

04fec94

fix(interp): finish string argument coercions

96e2aaf

nickna merged commit fd8ae33 into main Jul 28, 2026
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