mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-04-26 01:35:08 +02:00
7f89158d20
Replace the saved_lexical_environments stack in ExecutionContextRareData with explicit register-based environment tracking. Environments are now stored in registers and restored via SetLexicalEnvironment, making the environment flow visible in bytecode. Key changes: - Add GetLexicalEnvironment and SetLexicalEnvironment opcodes - CreateLexicalEnvironment takes explicit parent and dst operands - EnterObjectEnvironment stores new environment in a dst register - NewClass takes an explicit class_environment operand - Remove LeaveLexicalEnvironment opcode (instead: SetLexicalEnvironment) - Remove saved_lexical_environments from ExecutionContextRareData - Use a reserved register for the saved lexical environment to avoid dominance issues with lazily-emitted GetLexicalEnvironment
30 lines
573 B
JavaScript
30 lines
573 B
JavaScript
function closureOverBlockScope() {
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let fns = [];
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{
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let x = 1;
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fns.push(() => x);
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}
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{
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let y = 2;
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fns.push(() => y);
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}
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return fns[0]() + fns[1]();
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}
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console.log(closureOverBlockScope());
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function breakThroughBlockScopes() {
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let result;
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outer: for (let i = 0; i < 3; i++) {
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{
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let x = i;
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let f = () => x;
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if (x > 1) {
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result = f;
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break outer;
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}
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}
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}
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return result();
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}
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console.log(breakThroughBlockScopes());
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