Lyric

What changed in v2.1.0 — 2026-08-20

The ergonomics wave: two additive changes the audit measured the edges of. Four conformance cases activate with this release (//! since: 2.1.0); one 2.0 case pinning the old non-context rule retires with its sentence.

Added

• @Deprecated reaches members. A method, field or static let of a struct, class or enum — and an extend method — may carry @Deprecated; every use warns at the use site, exactly like a deprecated free function. Only this one attribute is admitted there: the module format has no member rows, and @Deprecated is the attribute that needs none. Interface members stay attribute-free — deprecating an abstract member would raise conformance questions nobody has answered.
• The adaptation context propagates structurally. let xs: int64[] = [1, 2, 3];, let i: int64 = if (c) 4 else 5; and the match twin compile now: in a §3.1 context the array elements and the arms check against the context type, an unsuffixed literal adapts, and a misfit errors at the element or arm. Without a context, elements and arms unify among themselves as before. Parameter defaults thread their context too.

The full changelog →