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feat: tuple syntax cutover — Tuple(...) type + .(...) value

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Replace the bare-paren tuple grammar with explicit, position-unambiguous
forms, mirroring how structs work:

  type     `(A, B)`        -> `Tuple(A, B)`          (named keeps `:`)
  value    `(a, b)`        -> `.(a, b)`              (named uses `=`)
  typed    (new)           -> `Tuple(A, B).(a, b)`   (like `Point.{...}`)
  failable `-> (T, !)`     -> `-> T !`
           `-> (T1, T2, !)`-> `-> Tuple(T1, T2) !`   (channel outside Tuple)

Bare `(...)` is now grouping only, everywhere; a comma in bare parens is a
hard error with a migration hint. Grouping, function types `(A, B) -> R`,
param lists, lambdas, and match bindings are unaffected.

`Tuple(...)` is strictly a TYPE in every position (including `size_of` /
`type_info` args); a tuple VALUE comes only from `.(...)` (anonymous) or
`Tuple(...).(...)` (explicitly typed). A bare `Tuple(1, 2)` is a tuple
type with non-type elements -> rejected.

The ~110 tuple-bearing corpus files were migrated with a one-shot
AST-aware migrator (the `sx migrate` tool from the prior commit, removed
here). New examples: 0130 (new syntax), 0131 (typed construction), 1060
(named-tuple failable return). 1116 golden updated for the new hint text.
This commit is contained in:
agra
2026-06-25 17:53:57 +03:00
parent c882c6c63e
commit 989e18b760
124 changed files with 941 additions and 1236 deletions
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10
examples/errors/1044-errors-generic-failable-composition.sx
View File

@@ -9,21 +9,21 @@
E :: error { Bad }
wrap :: ($T: Type, f: Closure() -> (T, !E)) -> (T, !E) { return try f(); }
wrap :: ($T: Type, f: Closure() -> T !E) -> T !E { return try f(); }
main :: () -> i32 {
// success, consumed by catch
print("catch={}\n", wrap(i32, closure(() -> (i32, !E) { return 7; })) catch (e) -1); // 7
print("catch={}\n", wrap(i32, closure(() -> i32 !E { return 7; })) catch (e) -1); // 7
// success, consumed by destructure (binds value + error slot); the value
// slot is read only under an `if !err` guard (ERR E1.8 path-sensitivity)
r, err := wrap(i32, closure(() -> (i32, !E) { return 9; }));
r, err := wrap(i32, closure(() -> i32 !E { return 9; }));
if !err { print("destr={} ok=true\n", r); } // destr=9 ok=true
// failure path: the raised tag propagates through the generic `try`
print("fail={}\n", wrap(i32, closure(() -> (i32, !E) { raise error.Bad; }) ) catch (e) -1); // -1
print("fail={}\n", wrap(i32, closure(() -> i32 !E { raise error.Bad; }) ) catch (e) -1); // -1
// a second monomorphization at a different T
print("u8={}\n", wrap(u8, closure(() -> (u8, !E) { return 200; })) catch (e) 0); // 200
print("u8={}\n", wrap(u8, closure(() -> u8 !E { return 200; })) catch (e) 0); // 200
return 0;
}