1d20380859
To better follow the spec, we need to distinguish between the current execution context's lexical environment and variable environment. This patch moves us to having two record pointers, although both of them point at the same environment records for now.
97 lines
2.9 KiB
C++
97 lines
2.9 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@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/FlyString.h>
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#include <AK/HashMap.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <AK/Weakable.h>
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#include <LibJS/AST.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Heap/DeferGC.h>
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#include <LibJS/Heap/Heap.h>
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#include <LibJS/Runtime/DeclarativeEnvironmentRecord.h>
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#include <LibJS/Runtime/ErrorTypes.h>
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#include <LibJS/Runtime/Exception.h>
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#include <LibJS/Runtime/MarkedValueList.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS {
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struct ExecutingASTNodeChain {
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ExecutingASTNodeChain* previous { nullptr };
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const ASTNode& node;
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};
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class Interpreter : public Weakable<Interpreter> {
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public:
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template<typename GlobalObjectType, typename... Args>
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static NonnullOwnPtr<Interpreter> create(VM& vm, Args&&... args)
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{
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DeferGC defer_gc(vm.heap());
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auto interpreter = adopt_own(*new Interpreter(vm));
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VM::InterpreterExecutionScope scope(*interpreter);
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interpreter->m_global_object = make_handle(static_cast<Object*>(interpreter->heap().allocate_without_global_object<GlobalObjectType>(forward<Args>(args)...)));
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static_cast<GlobalObjectType*>(interpreter->m_global_object.cell())->initialize_global_object();
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return interpreter;
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}
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static NonnullOwnPtr<Interpreter> create_with_existing_global_object(GlobalObject&);
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~Interpreter();
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void run(GlobalObject&, const Program&);
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GlobalObject& global_object();
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const GlobalObject& global_object() const;
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ALWAYS_INLINE VM& vm() { return *m_vm; }
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ALWAYS_INLINE const VM& vm() const { return *m_vm; }
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ALWAYS_INLINE Heap& heap() { return vm().heap(); }
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ALWAYS_INLINE Exception* exception() { return vm().exception(); }
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EnvironmentRecord* lexical_environment() { return vm().lexical_environment(); }
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FunctionEnvironmentRecord* current_function_environment_record();
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void enter_scope(const ScopeNode&, ScopeType, GlobalObject&);
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void exit_scope(const ScopeNode&);
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void push_ast_node(ExecutingASTNodeChain& chain_node)
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{
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chain_node.previous = m_ast_node_chain;
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m_ast_node_chain = &chain_node;
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}
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void pop_ast_node()
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{
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VERIFY(m_ast_node_chain);
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m_ast_node_chain = m_ast_node_chain->previous;
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}
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const ASTNode* current_node() const { return m_ast_node_chain ? &m_ast_node_chain->node : nullptr; }
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ExecutingASTNodeChain* executing_ast_node_chain() { return m_ast_node_chain; }
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const ExecutingASTNodeChain* executing_ast_node_chain() const { return m_ast_node_chain; }
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Value execute_statement(GlobalObject&, const Statement&, ScopeType = ScopeType::Block);
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private:
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explicit Interpreter(VM&);
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void push_scope(ScopeFrame frame);
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Vector<ScopeFrame> m_scope_stack;
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ExecutingASTNodeChain* m_ast_node_chain { nullptr };
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NonnullRefPtr<VM> m_vm;
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Handle<Object> m_global_object;
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};
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}
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