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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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 <AK/StringBuilder.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Object.h>
#include <LibJS/Runtime/Reference.h>
namespace JS {
void Reference::put(Interpreter& interpreter, GlobalObject& global_object, Value value)
{
// NOTE: The caller is responsible for doing an exception check after assign().
if (is_unresolvable()) {
throw_reference_error(interpreter, global_object);
return;
}
if (is_local_variable() || is_global_variable()) {
if (is_local_variable())
interpreter.vm().set_variable(m_name.to_string(), value, global_object);
else
global_object.put(m_name, value);
return;
}
if (!base().is_object() && interpreter.in_strict_mode()) {
interpreter.vm().throw_exception<TypeError>(global_object, ErrorType::ReferencePrimitiveAssignment, m_name.to_string().characters());
return;
}
auto* object = base().to_object(global_object);
if (!object)
return;
object->put(m_name, value);
}
void Reference::throw_reference_error(Interpreter& interpreter, GlobalObject& global_object)
{
auto property_name = m_name.to_string();
String message;
if (property_name.is_empty()) {
interpreter.vm().throw_exception<ReferenceError>(global_object, ErrorType::ReferenceUnresolvable);
} else {
interpreter.vm().throw_exception<ReferenceError>(global_object, ErrorType::UnknownIdentifier, property_name.characters());
}
}
Value Reference::get(Interpreter& interpreter, GlobalObject& global_object)
{
// NOTE: The caller is responsible for doing an exception check after fetch().
if (is_unresolvable()) {
throw_reference_error(interpreter, global_object);
return {};
}
if (is_local_variable() || is_global_variable()) {
Value value;
if (is_local_variable())
value = interpreter.vm().get_variable(m_name.to_string(), global_object);
else
value = global_object.get(m_name);
if (interpreter.exception())
return {};
if (value.is_empty()) {
throw_reference_error(interpreter, global_object);
return {};
}
return value;
}
auto* object = base().to_object(global_object);
if (!object)
return {};
return object->get(m_name).value_or(js_undefined());
}
}
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