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c60dc84a33
We were interpreting "undefined" as a variable lookup failure in some cases and throwing a ReferenceError exception instead of treating it as the valid value "undefined". This patch wraps the result of variable lookup in Optional<>, which allows us to only throw ReferenceError when lookup actually fails.
19 lines
324 B
JavaScript
19 lines
324 B
JavaScript
function assert(x) { if (!x) throw 1; }
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function foo(a) {
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return a;
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}
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try {
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var x = undefined;
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assert(x === undefined);
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assert(foo(x) === undefined);
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var o = {};
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o.x = x;
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assert(o.x === undefined);
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assert(o.x === x);
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console.log("PASS");
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} catch (e) {
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console.log("FAIL: " + e);
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}
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