mirror of
https://github.com/fluencelabs/assemblyscript
synced 2025-04-25 15:12:12 +00:00
0c64f21250
* Rework IR and resolver to use nested lookup tables * Integrate types into IR * Make components prefer IR, slimmed down AST * Implement `export *` * Add `@lazy` annotation and remove `--noTreeShaking` * Add `@start` annotation and remove magic `main` * Related refactoring, cleanup and docs
36 lines
1021 B
TypeScript
36 lines
1021 B
TypeScript
import "allocator/arena";
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import "collector/itcm";
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// a class to test with
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class MyObject {
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a: u32;
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}
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function MyObject_visit(ref: usize): void {} // function table index == classId ?
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// allocate a managed instance
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var obj: MyObject | null = changetype<MyObject>(__gc_allocate(offsetof<MyObject>(), MyObject_visit));
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obj.a = 123;
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// check header
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{
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let head = changetype<usize>(obj) - 16;
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let next = load<u32>(head, 0) & ~3;
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let prev = load<u32>(head, 4);
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assert(next != 0 && prev != 0 && next == prev);
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let visitFn = load<u32>(head, 8);
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assert(visitFn == changetype<u32>(MyObject_visit));
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let unused = load<u32>(head, 12);
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assert(unused == 0);
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let a = load<u32>(head, 16);
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assert(a == 123);
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}
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gc.collect(); // should keep 'obj' because it's a referenced root (see trace output)
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obj = null;
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gc.collect(); // should free 'obj' because it isn't referenced anymore (see trace output)
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var obj2: MyObject; // should also iterate globals defined late
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@start
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export function main(): i32 { return 0; }
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