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LibJS: Add using declaration support, RAII like operation in js

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In this patch only top level and not the more complicated for loop using
statements are supported. Also, as noted in the latest meeting of tc39
async parts of the spec are not stage 3 thus not included.
This commit is contained in:
davidot 2022-12-20 22:09:57 +01:00 • committed by Linus Groh
parent 2c87ff2218
commit 541637e15a
15 changed files with 861 additions and 68 deletions
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14
Userland/Libraries/LibJS/Tests/modules/top-level-dispose.mjs Normal file
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@ -0,0 +1,14 @@
export let passed = false;
let failed = false;
if (passed)
failed = true;
using a = { [Symbol.dispose]() { if (!failed) passed = true; } }
if (passed)
failed = true;
failed = true;
// Should trigger before
using b = { [Symbol.dispose]() { if (!passed) failed = false; } }