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LibJS/Bytecode: Make typeof return "undefined" on unresolvable IDs

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Previously it would throw instead of returning "undefined" for
`typeof Identifier` if Identifier does not exist.
This commit is contained in:
Luke Wilde 2022-06-11 23:12:22 +01:00 • committed by Ali Mohammad Pur
parent c0fadfb9b7
commit 482a827346
4 changed files with 55 additions and 1 deletions
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16
Userland/Libraries/LibJS/Bytecode/Op.h
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@ -910,6 +910,22 @@ public:
void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
};
class TypeofVariable final : public Instruction {
public:
explicit TypeofVariable(IdentifierTableIndex identifier)
: Instruction(Type::TypeofVariable)
, m_identifier(identifier)
{
}
ThrowCompletionOr<void> execute_impl(Bytecode::Interpreter&) const;
String to_string_impl(Bytecode::Executable const&) const;
void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
private:
IdentifierTableIndex m_identifier;
};
}
namespace JS::Bytecode {