120 lines
3.7 KiB
C++
120 lines
3.7 KiB
C++
/*
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* Copyright (c) 2020, Matthew Olsson <matthewcolsson@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibJS/Interpreter.h>
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#include <LibJS/Runtime/IteratorOperations.h>
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namespace JS {
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Object* get_iterator(Object& obj, String hint, Value method)
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{
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auto& interpreter = obj.interpreter();
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ASSERT(hint == "sync" || hint == "async");
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if (method.is_empty()) {
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if (hint == "async")
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TODO();
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method = obj.get(obj.interpreter().well_known_symbol_iterator());
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if (interpreter.exception())
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return {};
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}
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if (!method.is_function())
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TODO();
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auto iterator = interpreter.call(method.as_function(), &obj);
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if (interpreter.exception())
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return {};
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if (!iterator.is_object())
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TODO();
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return &iterator.as_object();
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}
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Value iterator_next(Object& iterator, Value value)
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{
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auto& interpreter = iterator.interpreter();
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auto next_method = iterator.get("next");
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if (interpreter.exception())
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return {};
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ASSERT(next_method.is_function());
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Value result;
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if (value.is_empty()) {
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result = interpreter.call(next_method.as_function(), &iterator);
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} else {
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MarkedValueList arguments(iterator.heap());
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arguments.append(value);
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result = interpreter.call(next_method.as_function(), &iterator, move(arguments));
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}
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if (interpreter.exception())
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return {};
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if (!result.is_object())
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TODO();
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return result;
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}
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bool is_iterator_complete(Object& iterator_result)
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{
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auto done = iterator_result.get("done");
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if (iterator_result.interpreter().exception())
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return false;
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return done.to_boolean();
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}
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Value iterator_value(Object& iterator_result)
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{
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return iterator_result.get("value");
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}
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Value iterator_step(Object& iterator)
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{
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auto& interpreter = iterator.interpreter();
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auto result = iterator_next(iterator);
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if (interpreter.exception())
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return {};
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auto done = is_iterator_complete(result.as_object());
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if (interpreter.exception())
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return {};
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if (done)
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return Value(false);
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return result;
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}
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void iterator_close(Object& iterator)
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{
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(void)iterator;
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TODO();
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}
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Value create_iterator_result_object(Interpreter& interpreter, GlobalObject& global_object, Value value, bool done)
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{
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auto* object = Object::create_empty(interpreter, global_object);
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object->define_property("value", value);
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object->define_property("done", Value(done));
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return object;
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}
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}
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