9618f99d0d
A tuple_init's element values must match its field types exactly — LLVM
`insertvalue` does no implicit conversion. An inferred `pair := (40, 2)`
lowered its elements under the enclosing fn's `target_type` (e.g. main's
s32 return), producing i32 values, while the field types were inferred
independently as s64. The {i64,i64} aggregate was filled with i32
constants, so reading any element back returned garbage (40 + 2^32) and
tuple equality was always false.
lowerTupleLiteral now lowers each element under its resolved field type
(the contextual target tuple's fields when present, else per-element
inference) and coerces to it, so value width always matches field width.
Assignment to a tuple-typed field/element now also propagates the target
tuple type. Adds examples/190-tuple-values.sx as a regression test and
examples/probes/tuple-baseline.sx as the Step 0.4 audit artifact.
50 lines
1.5 KiB
Plaintext
50 lines
1.5 KiB
Plaintext
// Tuple values: construction, element access, struct-field storage,
|
|
// return, and operators. Regression for the tuple-construction bug where
|
|
// an inferred `:=` tuple literal lowered its element values under the
|
|
// enclosing fn's (narrower) return `target_type`, mismatching the
|
|
// independently-inferred s64 field types and yielding garbage on read.
|
|
|
|
#import "modules/std.sx";
|
|
|
|
Box :: struct { xs: (s32, s32); }
|
|
|
|
swap :: (a: s64, b: s64) -> (s64, s64) { (b, a); }
|
|
fst :: (t: (s64, s64)) -> s64 { t.0; }
|
|
|
|
main :: () -> s32 {
|
|
// Inferred positional tuple + numeric field access.
|
|
pair := (40, 2);
|
|
print("pair {} {}\n", pair.0, pair.1);
|
|
|
|
// Named tuple: named + numeric access.
|
|
named := (x: 10, y: 20);
|
|
print("named {} {} {}\n", named.x, named.0, named.1);
|
|
|
|
// Element into a typed local (access path, not just print).
|
|
a : s64 = pair.0;
|
|
b : s64 = pair.1;
|
|
print("locals {} {}\n", a, b);
|
|
|
|
// Tuple-typed struct field: store a tuple value, read both elements.
|
|
box : Box = ---;
|
|
box.xs = (7, 9);
|
|
print("field {} {}\n", box.xs.0, box.xs.1);
|
|
|
|
// Return a tuple from a function.
|
|
s := swap(1, 2);
|
|
print("ret {} {}\n", s.0, s.1);
|
|
|
|
// Pass a tuple by value.
|
|
print("pass {}\n", fst((11, 22)));
|
|
|
|
// Operators: equality, concatenation, repetition, membership, lex.
|
|
print("eq {}\n", (1, 2) == (1, 2));
|
|
c := (1, 2) + (3, 4);
|
|
print("concat {} {}\n", c.0, c.3);
|
|
r := (1, 2) * 3;
|
|
print("rep {} {}\n", r.0, r.5);
|
|
print("mem {}\n", 3 in (1, 2, 3));
|
|
print("lex {}\n", (1, 2) < (1, 3));
|
|
0;
|
|
}
|