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https://github.com/RGBCube/serenity
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67b8e6fc5b
Expression nodes can now be asked to produce a Reference. We then use this to implement the "delete" operator without downcasting the child node to a MemberExpression manually.
68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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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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#pragma once
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#include <AK/String.h>
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#include <LibJS/Runtime/PropertyName.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS {
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class Reference {
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public:
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Reference() {}
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Reference(Value base, const PropertyName& name, bool strict = false)
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: m_base(base)
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, m_name(name)
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, m_strict(strict)
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{
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}
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Value base() const { return m_base; }
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const PropertyName& name() const { return m_name; }
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bool is_strict() const { return m_strict; }
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bool is_unresolvable() const { return m_base.is_undefined(); }
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bool is_property() const
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{
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return m_base.is_object() || has_primitive_base();
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}
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bool has_primitive_base() const
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{
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return m_base.is_boolean() || m_base.is_string() || m_base.is_number();
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}
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private:
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Value m_base { js_undefined() };
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PropertyName m_name;
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bool m_strict { false };
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};
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const LogStream& operator<<(const LogStream&, const Value&);
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}
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