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50 lines
2.2 KiB
C++
50 lines
2.2 KiB
C++
/*
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* Copyright (c) 2022, David Tuin <davidot@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 <LibJS/Module.h>
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#include <LibJS/Runtime/DeclarativeEnvironment.h>
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#include <LibJS/Runtime/Environment.h>
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namespace JS {
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// 9.1.1.5 Module Environment Records, https://tc39.es/ecma262/#sec-module-environment-records
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class ModuleEnvironment final : public DeclarativeEnvironment {
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JS_ENVIRONMENT(ModuleEnvironment, DeclarativeEnvironment);
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public:
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ModuleEnvironment(Environment* outer_environment);
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// Note: Module Environment Records support all of the declarative Environment Record methods listed
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// in Table 18 and share the same specifications for all of those methods except for
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// GetBindingValue, DeleteBinding, HasThisBinding and GetThisBinding.
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// In addition, module Environment Records support the methods listed in Table 24.
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virtual ThrowCompletionOr<Value> get_binding_value(GlobalObject&, FlyString const& name, bool strict) override;
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virtual ThrowCompletionOr<bool> delete_binding(GlobalObject&, FlyString const& name) override;
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virtual bool has_this_binding() const final { return true; }
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virtual ThrowCompletionOr<Value> get_this_binding(GlobalObject&) const final;
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ThrowCompletionOr<void> create_import_binding(FlyString name, Module* module, FlyString binding_name);
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// Note: Although the spec does not explicitly say this we also have to implement HasBinding as
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// the HasBinding method of Declarative Environment records states:
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// "It determines if the argument identifier is one of the identifiers bound by the record"
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// And this means that we have to include the indirect bindings of a Module Environment.
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virtual ThrowCompletionOr<bool> has_binding(FlyString const& name, Optional<size_t>* = nullptr) const override;
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private:
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struct IndirectBinding {
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FlyString name;
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Module* module;
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FlyString binding_name;
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};
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IndirectBinding const* get_indirect_binding(FlyString const& name) const;
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// FIXME: Since we always access this via the name this could be a map.
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Vector<IndirectBinding> m_indirect_bindings;
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};
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}
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