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LibJS: Forward a string aproximation of the CallExpression to Call Ops

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This gives us better debug output when analysing calls to `undefined`
and also fixes multiple test-js cases expecting an
`(evaluated from $Expression)` in the error message.

This also refactors out the generation of that string, to avoid code
duplication with the AST interpreter.
This commit is contained in:
Hendiadyoin1 2022-10-01 01:36:06 +02:00 • committed by Linus Groh
parent a2ccf31a62
commit 490c097bc4
5 changed files with 42 additions and 17 deletions
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26
Userland/Libraries/LibJS/AST.cpp
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@ -404,21 +404,25 @@ Completion NewExpression::execute(Interpreter& interpreter) const
return Value { TRY(construct(vm, constructor.as_function(), move(arg_list))) };
}
Optional<String> CallExpression::expression_string() const
{
if (is<Identifier>(*m_callee))
return static_cast<Identifier const&>(*m_callee).string();
if (is<MemberExpression>(*m_callee))
return static_cast<MemberExpression const&>(*m_callee).to_string_approximation();
return {};
}
Completion CallExpression::throw_type_error_for_callee(Interpreter& interpreter, Value callee_value, StringView call_type) const
{
auto& vm = interpreter.vm();
if (is<Identifier>(*m_callee) || is<MemberExpression>(*m_callee)) {
String expression_string;
if (is<Identifier>(*m_callee)) {
expression_string = static_cast<Identifier const&>(*m_callee).string();
} else {
expression_string = static_cast<MemberExpression const&>(*m_callee).to_string_approximation();
}
return vm.throw_completion<TypeError>(ErrorType::IsNotAEvaluatedFrom, callee_value.to_string_without_side_effects(), call_type, expression_string);
} else {
return vm.throw_completion<TypeError>(ErrorType::IsNotA, callee_value.to_string_without_side_effects(), call_type);
}
if (auto expression_string = this->expression_string(); expression_string.has_value())
return vm.throw_completion<TypeError>(ErrorType::IsNotAEvaluatedFrom, callee_value.to_string_without_side_effects(), call_type, expression_string.release_value());
return vm.throw_completion<TypeError>(ErrorType::IsNotA, callee_value.to_string_without_side_effects(), call_type);
}
// 13.3.6.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-function-calls-runtime-semantics-evaluation