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LibJS: Make Value() default-construct the undefined value

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The special empty value (that we use for array holes, Optional<Value>
when empty and a few other other placeholder/sentinel tasks) still
exists, but you now create one via JS::js_special_empty_value() and
check for it with Value::is_special_empty_value().

The main idea here is to make it very unlikely to accidentally create an
unexpected special empty value.
This commit is contained in:
Andreas Kling 2025-04-04 23:16:34 +02:00 • committed by Andreas Kling
commit 3cf50539ec
Notes: github-actions[bot] 2025-04-05 09:21:31 +00:00
43 changed files with 165 additions and 122 deletions
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2
Libraries/LibJS/Runtime/FunctionEnvironment.h
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@ -34,7 +34,7 @@ public:
Value new_target() const { return m_new_target; }
void set_new_target(Value new_target)
{
VERIFY(!new_target.is_empty());
VERIFY(!new_target.is_special_empty_value());
m_new_target = new_target;
}