989e18b760
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.
43 lines
1.1 KiB
Plaintext
43 lines
1.1 KiB
Plaintext
// Integer literals default to i64 regardless of context: an unannotated
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// `x := <int literal>` local stays i64 even inside a function whose return
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// type is a narrower integer (the implicit-return target must not type the
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// body's declarations), and a large literal initializer keeps its value.
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// Also covers destructure decls (`a, b := ...`), which share the same rule.
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// Regression (issue 0111): these locals adopted the enclosing fn's return
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// type (i32/i8), silently wrapping `big := 3000000000` to -1294967296.
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#import "modules/std.sx";
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f :: () -> i32 {
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x := 0;
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print("f.x: {}\n", type_name(type_of(x)));
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0
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}
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g :: () -> i8 {
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x := 0;
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print("g.x: {}\n", type_name(type_of(x)));
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0
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}
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big_host :: () -> i32 {
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big := 3000000000;
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print("big: {} = {}\n", type_name(type_of(big)), big);
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0
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}
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d_host :: () -> i32 {
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a, b := .(1, 2);
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print("a: {} b: {}\n", type_name(type_of(a)), type_name(type_of(b)));
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0
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}
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main :: () {
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f();
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g();
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big_host();
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d_host();
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x := 0;
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print("main.x: {}\n", type_name(type_of(x)));
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}
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