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LibJS: Convert Interpreter::run() to ThrowCompletionOr<Value>

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Instead of making it a void function, checking for an exception, and
then receiving the relevant result via VM::last_value(), we can
consolidate all of this by using completions.

This allows us to remove more uses of VM::exception(), and all uses of
VM::last_value().
This commit is contained in:
Linus Groh 2022-01-08 21:28:27 +01:00
parent f73afbb5ae
commit eb60d16549
13 changed files with 62 additions and 56 deletions
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27
Userland/Utilities/js.cpp
View file

@ -915,6 +915,8 @@ static bool parse_and_run(JS::Interpreter& interpreter, StringView source, Strin
if (s_dump_ast)
program->dump(0);
auto result = JS::ThrowCompletionOr<JS::Value> { JS::js_undefined() };
if (parser.has_errors()) {
auto error = parser.errors()[0];
if (!s_disable_source_location_hints) {
@ -922,7 +924,7 @@ static bool parse_and_run(JS::Interpreter& interpreter, StringView source, Strin
if (!hint.is_empty())
js_outln("{}", hint);
}
vm->throw_exception<JS::SyntaxError>(interpreter.global_object(), error.to_string());
result = vm->throw_completion<JS::SyntaxError>(interpreter.global_object(), error.to_string());
} else {
if (JS::Bytecode::g_dump_bytecode || s_run_bytecode) {
auto executable = JS::Bytecode::Generator::generate(*program);
@ -938,15 +940,12 @@ static bool parse_and_run(JS::Interpreter& interpreter, StringView source, Strin
if (s_run_bytecode) {
JS::Bytecode::Interpreter bytecode_interpreter(interpreter.global_object(), interpreter.realm());
auto result = bytecode_interpreter.run(executable);
// Since all the error handling code uses vm.exception() we just rethrow any exception we got here.
if (result.is_error())
vm->throw_exception(interpreter.global_object(), *result.throw_completion().value());
result = bytecode_interpreter.run(executable);
} else {
return true;
}
} else {
interpreter.run(interpreter.global_object(), *program);
result = interpreter.run(interpreter.global_object(), *program);
}
}
@ -982,15 +981,15 @@ static bool parse_and_run(JS::Interpreter& interpreter, StringView source, Strin
}
};
if (vm->exception()) {
handle_exception();
return false;
}
if (s_print_last_result)
print(vm->last_value());
if (vm->exception()) {
if (result.is_error()) {
handle_exception();
return false;
} else if (s_print_last_result) {
print(result.value());
if (vm->exception()) {
handle_exception();
return false;
}
}
return true;
}
@ -1010,7 +1009,7 @@ static JS::ThrowCompletionOr<JS::Value> load_file_impl(JS::VM& vm, JS::GlobalObj
return vm.throw_completion<JS::SyntaxError>(global_object, error.to_string());
}
// FIXME: Use eval()-like semantics and execute in current scope?
vm.interpreter().run(global_object, *program);
TRY(vm.interpreter().run(global_object, *program));
return JS::js_undefined();
}