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docs: tuple syntax cutover — Tuple(...) type, .(...) value, channel-outside-Tuple failables

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Rewrite specs.md tuple/failable/pack/UFCS/grammar sections to the new
syntax, update readme.md, and refresh stale tuple references in example
header comments. Also fixes two pre-existing doc inaccuracies surfaced in
review: drop the value-discarding `;` in the tuple-return examples, and
correct the §13 function-type grammar production (optional param list +
optional trailing `!` channel). Optional semantics unchanged.

current/CHECKPOINT-LANG.md logs the cutover.
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agra
2026-06-25 18:41:22 +03:00
parent 1dfc22794e
commit 40b5fb5f7e
17 changed files with 184 additions and 103 deletions
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4
examples/packs/0533-packs-pack-tuple-materialize.sx
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@@ -1,5 +1,5 @@
// Feature 1 — materialize a tuple from a pack via `(..xs.method)` (Decision 2:
// a pack is stored by materializing a tuple). `(..xs.get)` projects `get` over
// Feature 1 — materialize a tuple from a pack via `.(..xs.method)` (Decision 2:
// a pack is stored by materializing a tuple). `.(..xs.get)` projects `get` over
// the pack and collects the results into a real tuple value, which can then be
// stored, indexed, and (for `Box(T)`) is heterogeneous per position.