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LibJS: Implement $262.evalScript() according to the given algorithm

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test262's INTERPRETING.md specifies the exact steps for this function,
so let's shuffle some things around and add "spec" comments.

Most importantly this now returns the result of the evaluated script,
which at least one test relies on:
https://github.com/tc39/test262/blob/main/test/built-ins/Proxy/revocable/tco-fn-realm.js
This commit is contained in:
Linus Groh 2022-08-30 12:00:04 +01:00
parent 69415f0608
commit 6cedb1b9d9
1 changed files with 24 additions and 6 deletions
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30
Userland/Libraries/LibJS/Contrib/Test262/$262Object.cpp
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@ -80,12 +80,30 @@ JS_DEFINE_NATIVE_FUNCTION($262Object::detach_array_buffer)
JS_DEFINE_NATIVE_FUNCTION($262Object::eval_script)
{
auto source = TRY(vm.argument(0).to_string(vm));
auto script_or_error = Script::parse(source, *vm.current_realm());
if (script_or_error.is_error())
return vm.throw_completion<SyntaxError>(script_or_error.error()[0].to_string());
TRY(vm.interpreter().run(script_or_error.value()));
return js_undefined();
auto source_text = TRY(vm.argument(0).to_string(vm));
// 1. Let hostDefined be any host-defined values for the provided sourceText (obtained in an implementation dependent manner)
// 2. Let realm be the current Realm Record.
auto& realm = *vm.current_realm();
// 3. Let s be ParseScript(sourceText, realm, hostDefined).
auto script_or_error = Script::parse(source_text, realm);
// 4. If s is a List of errors, then
if (script_or_error.is_error()) {
// a. Let error be the first element of s.
auto& error = script_or_error.error()[0];
// b. Return Completion { [[Type]]: throw, [[Value]]: error, [[Target]]: empty }.
return vm.throw_completion<SyntaxError>(error.to_string());
}
// 5. Let status be ScriptEvaluation(s).
auto status = vm.interpreter().run(script_or_error.value());
// 6. Return Completion(status).
return status;
}
}