mirror of
https://github.com/LadybirdBrowser/ladybird
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a439dc8490
Each finally scope gets two registers (completion_type and completion_value) that form an explicit completion record. Every path into the finally body sets these before jumping, and a dispatch chain after the finally body routes to the correct continuation. This replaces the old implicit protocol that relied on the exception register, a saved_return_value register, and a scheduled_jump field on ExecutionContext, allowing us to remove: - 5 opcodes (ContinuePendingUnwind, ScheduleJump, LeaveFinally, RestoreScheduledJump, PrepareYield) - 1 reserved register (saved_return_value) - 2 ExecutionContext fields (scheduled_jump, previously_scheduled_jumps)
35 lines
650 B
JavaScript
35 lines
650 B
JavaScript
function basicTryFinally() {
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try {
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return 1;
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} finally {
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console.log("finally");
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}
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}
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basicTryFinally();
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function breakThroughFinally() {
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for (let i = 0; i < 10; i++) {
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try {
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if (i === 5) break;
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} finally {
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console.log(i);
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}
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}
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}
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breakThroughFinally();
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function nestedTryFinallyWithBreak() {
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outer: for (let i = 0; ; i++) {
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try {
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try {
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break outer;
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} finally {
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console.log("inner");
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}
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} finally {
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console.log("outer");
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}
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}
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}
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nestedTryFinallyWithBreak();
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