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88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
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* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Format.h>
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#include <AK/String.h>
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#include <AK/Types.h>
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#include <AK/Vector.h>
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namespace JS {
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struct Attribute {
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enum {
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Writable = 1 << 0,
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Enumerable = 1 << 1,
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Configurable = 1 << 2,
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};
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};
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// 6.1.7.1 Property Attributes, https://tc39.es/ecma262/#sec-property-attributes
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class PropertyAttributes {
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public:
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PropertyAttributes(u8 bits = 0)
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: m_bits(bits)
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{
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}
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[[nodiscard]] bool is_writable() const { return m_bits & Attribute::Writable; }
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[[nodiscard]] bool is_enumerable() const { return m_bits & Attribute::Enumerable; }
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[[nodiscard]] bool is_configurable() const { return m_bits & Attribute::Configurable; }
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void set_writable(bool writable = true)
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{
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if (writable)
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m_bits |= Attribute::Writable;
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else
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m_bits &= ~Attribute::Writable;
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}
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void set_enumerable(bool enumerable = true)
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{
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if (enumerable)
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m_bits |= Attribute::Enumerable;
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else
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m_bits &= ~Attribute::Enumerable;
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}
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void set_configurable(bool configurable = true)
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{
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if (configurable)
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m_bits |= Attribute::Configurable;
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else
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m_bits &= ~Attribute::Configurable;
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}
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bool operator==(PropertyAttributes const& other) const { return m_bits == other.m_bits; }
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bool operator!=(PropertyAttributes const& other) const { return m_bits != other.m_bits; }
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[[nodiscard]] u8 bits() const { return m_bits; }
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private:
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u8 m_bits;
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};
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PropertyAttributes const default_attributes = Attribute::Configurable | Attribute::Writable | Attribute::Enumerable;
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}
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namespace AK {
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template<>
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struct Formatter<JS::PropertyAttributes> : Formatter<StringView> {
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ErrorOr<void> format(FormatBuilder& builder, JS::PropertyAttributes const& property_attributes)
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{
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Vector<String> parts;
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parts.append(String::formatted("[[Writable]]: {}", property_attributes.is_writable()));
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parts.append(String::formatted("[[Enumerable]]: {}", property_attributes.is_enumerable()));
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parts.append(String::formatted("[[Configurable]]: {}", property_attributes.is_configurable()));
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return Formatter<StringView>::format(builder, String::formatted("PropertyAttributes {{ {} }}", String::join(", ", parts)));
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}
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};
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}
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