/* * Copyright (c) 2020, Andreas Kling * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include namespace JS { void Reference::put(Interpreter& interpreter, Value value) { // NOTE: The caller is responsible for doing an exception check after assign(). if (is_unresolvable()) { throw_reference_error(interpreter); return; } if (is_local_variable() || is_global_variable()) { if (is_local_variable()) interpreter.set_variable(m_name.to_string(), value); else interpreter.global_object().put(m_name, value); return; } auto* object = base().to_object(interpreter); if (!object) return; object->put(m_name, value); } void Reference::throw_reference_error(Interpreter& interpreter) { auto property_name = m_name.to_string(); String message; if (property_name.is_empty()) message = "Unresolvable reference"; else message = String::format("'%s' not known", property_name.characters()); interpreter.throw_exception(message); } Value Reference::get(Interpreter& interpreter) { // NOTE: The caller is responsible for doing an exception check after fetch(). if (is_unresolvable()) { throw_reference_error(interpreter); return {}; } if (is_local_variable() || is_global_variable()) { Value value; if (is_local_variable()) value = interpreter.get_variable(m_name.to_string()); else value = interpreter.global_object().get(m_name); if (interpreter.exception()) return {}; if (value.is_empty()) { throw_reference_error(interpreter); return {}; } return value; } auto* object = base().to_object(interpreter); if (!object) return {}; return object->get(m_name).value_or(js_undefined()); } }