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LibJS: Integrate labels into the Interpreter

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The interpreter now considers a statement or block's label when
considering whether or not to break. All statements can be labelled.
This commit is contained in:
Matthew Olsson 2020-05-28 13:36:59 -07:00 • committed by Andreas Kling
parent 03615a7872
commit d52ea37717
6 changed files with 87 additions and 21 deletions
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14
Libraries/LibJS/Interpreter.h
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@ -91,9 +91,18 @@ public:
Heap& heap() { return m_heap; }
void unwind(ScopeType type) { m_unwind_until = type; }
void unwind(ScopeType type, FlyString label = {})
{
m_unwind_until = type;
m_unwind_until_label = label;
}
void stop_unwind() { m_unwind_until = ScopeType::None; }
bool should_unwind_until(ScopeType type) const { return m_unwind_until == type; }
bool should_unwind_until(ScopeType type, FlyString label) const
{
if (m_unwind_until_label.is_null())
return m_unwind_until == type;
return m_unwind_until == type && m_unwind_until_label == label;
}
bool should_unwind() const { return m_unwind_until != ScopeType::None; }
Value get_variable(const FlyString& name);
@ -189,6 +198,7 @@ private:
Exception* m_exception { nullptr };
ScopeType m_unwind_until { ScopeType::None };
FlyString m_unwind_until_label;
Console m_console;
};