5ec468bfdd
Previously, these were stored in a vector that was linearly scanned. For large sites this vector could contain hundreds of entries, so a HashMap gives a significant speedup.
49 lines
1.9 KiB
C++
49 lines
1.9 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 <AK/HashMap.h>
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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 JS_API ModuleEnvironment final : public DeclarativeEnvironment {
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JS_ENVIRONMENT(ModuleEnvironment, DeclarativeEnvironment);
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GC_DECLARE_ALLOCATOR(ModuleEnvironment);
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public:
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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(VM&, Utf16FlyString const& name, bool strict) override;
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virtual ThrowCompletionOr<bool> delete_binding(VM&, Utf16FlyString 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(VM&) const final;
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ThrowCompletionOr<void> create_import_binding(Utf16FlyString name, Module* module, Utf16FlyString binding_name);
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private:
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explicit ModuleEnvironment(Environment* outer_environment);
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virtual void visit_edges(Visitor&) override;
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virtual size_t external_memory_size() const override;
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struct IndirectBinding {
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GC::Ptr<Module> module;
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Utf16FlyString binding_name;
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};
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IndirectBinding const* get_indirect_binding(Utf16FlyString const& name) const;
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virtual Optional<BindingAndIndex> find_binding_and_index(Utf16FlyString const& name) const override;
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HashMap<Utf16FlyString, IndirectBinding> m_indirect_bindings;
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};
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}
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