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https://github.com/LadybirdBrowser/ladybird.git
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0efa98a57a
This has quite a lot of fall out. But the majority of it is just type or UDL substitution, where the changes just fall through to other function calls. By changing property key storage to UTF-16, the main affected areas are: * NativeFunction names must now be UTF-16 * Bytecode identifiers must now be UTF-16 * Module/binding names must now be UTF-16
78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
/*
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* Copyright (c) 2020-2022, Andreas Kling <andreas@ladybird.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/StringView.h>
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#include <LibJS/Export.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/Object.h>
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namespace JS {
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struct Variable {
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Value value;
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DeclarationKind declaration_kind;
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};
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#define JS_ENVIRONMENT(class_, base_class) GC_CELL(class_, base_class)
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class JS_API Environment : public Cell {
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GC_CELL(Environment, Cell);
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public:
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enum class InitializeBindingHint {
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Normal,
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SyncDispose,
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AsyncDispose,
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};
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virtual bool has_this_binding() const { return false; }
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virtual ThrowCompletionOr<Value> get_this_binding(VM&) const { return Value {}; }
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virtual Object* with_base_object() const { return nullptr; }
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virtual ThrowCompletionOr<bool> has_binding([[maybe_unused]] Utf16FlyString const& name, [[maybe_unused]] Optional<size_t>* out_index = nullptr) const = 0;
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virtual ThrowCompletionOr<void> create_mutable_binding(VM&, [[maybe_unused]] Utf16FlyString const& name, [[maybe_unused]] bool can_be_deleted) = 0;
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virtual ThrowCompletionOr<void> create_immutable_binding(VM&, [[maybe_unused]] Utf16FlyString const& name, [[maybe_unused]] bool strict) = 0;
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virtual ThrowCompletionOr<void> initialize_binding(VM&, [[maybe_unused]] Utf16FlyString const& name, Value, InitializeBindingHint) = 0;
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virtual ThrowCompletionOr<void> set_mutable_binding(VM&, [[maybe_unused]] Utf16FlyString const& name, Value, [[maybe_unused]] bool strict) = 0;
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virtual ThrowCompletionOr<Value> get_binding_value(VM&, [[maybe_unused]] Utf16FlyString const& name, [[maybe_unused]] bool strict) = 0;
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virtual ThrowCompletionOr<bool> delete_binding(VM&, [[maybe_unused]] Utf16FlyString const& name) = 0;
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// [[OuterEnv]]
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Environment* outer_environment() { return m_outer_environment; }
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Environment const* outer_environment() const { return m_outer_environment; }
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[[nodiscard]] bool is_declarative_environment() const { return m_declarative; }
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virtual bool is_global_environment() const { return false; }
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virtual bool is_function_environment() const { return false; }
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template<typename T>
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bool fast_is() const = delete;
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// This flag is set on the entire variable environment chain when direct eval() is performed.
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// It is used to disable non-local variable access caching.
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bool is_permanently_screwed_by_eval() const { return m_permanently_screwed_by_eval; }
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void set_permanently_screwed_by_eval();
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protected:
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enum class IsDeclarative {
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No,
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Yes,
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};
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explicit Environment(Environment* parent, IsDeclarative = IsDeclarative::No);
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virtual void visit_edges(Visitor&) override;
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private:
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bool m_permanently_screwed_by_eval { false };
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bool m_declarative { false };
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GC::Ptr<Environment> m_outer_environment;
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};
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}
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