dimgigov
cfb89dd72f
Track locals moved by value into struct fields, let bindings, or return
values so Array/Drop types are not freed while still owned by the target.
- hir_lower: movedOutLocals + markMovedOutFromAst + shouldSkipDrop
- Nexus: drop zeroing workaround; free headers after each request
- examples/move_field.bux regression for Box { items: arr }
30 lines
970 B
Plaintext
30 lines
970 B
Plaintext
// Field-move ownership: Array moved into a struct must not be auto-dropped.
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import Std::Io::{PrintLine};
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import Std::Array::{Array, Array_New, Array_Push, Array_Len, Array_Get};
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import Std::String::{String_FromInt, String_Concat};
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import Std::Test::{Test_AssertTrue, Test_Pass};
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struct Box {
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items: Array<int>;
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}
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func MakeBox() -> Box {
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var items: Array<int> = Array_New<int>(4);
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Array_Push<int>(&items, 10);
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Array_Push<int>(&items, 20);
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// Move `items` into the field — compiler skips Drop of `items`
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let b: Box = Box { items: items };
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return b;
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}
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func Main() -> int {
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let b: Box = MakeBox();
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Test_AssertTrue(Array_Len<int>(&b.items) == 2);
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Test_AssertTrue(Array_Get<int>(&b.items, 0) == 10);
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Test_AssertTrue(Array_Get<int>(&b.items, 1) == 20);
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PrintLine(String_Concat("sum=", String_FromInt(
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(Array_Get<int>(&b.items, 0) + Array_Get<int>(&b.items, 1)) as int64)));
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Test_Pass("move_field");
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return 0;
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}
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