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https://github.com/carbon-language/carbon-lang.git
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Dave Abrahams
dd4e37e761
Making Values const allows us to separate the actual mutations (search for "*&" in this change) from places where the Value is effectively passed by-value.
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef EXECUTABLE_SEMANTICS_INTERPRETER_INTERPRETER_H_
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#define EXECUTABLE_SEMANTICS_INTERPRETER_INTERPRETER_H_
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#include <list>
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#include <utility>
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#include <vector>
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#include "executable_semantics/ast/declaration.h"
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#include "executable_semantics/interpreter/action.h"
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#include "executable_semantics/interpreter/dictionary.h"
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#include "executable_semantics/interpreter/stack.h"
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#include "executable_semantics/interpreter/value.h"
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namespace Carbon {
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using Env = Dictionary<std::string, Address>;
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/***** Scopes *****/
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struct Scope {
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Scope(Env e, std::list<std::string> l) : env(e), locals(std::move(l)) {}
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Env env;
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std::list<std::string> locals;
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};
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/***** Frames and State *****/
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struct Frame {
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std::string name;
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Stack<Scope*> scopes;
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Stack<Action*> todo;
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Frame(std::string n, Stack<Scope*> s, Stack<Action*> c)
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: name(std::move(std::move(n))), scopes(s), todo(c) {}
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};
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struct State {
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Stack<Frame*> stack;
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std::vector<const Value*> heap;
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std::vector<bool> alive;
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};
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extern State* state;
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void PrintEnv(Env env);
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auto AllocateValue(const Value* v) -> Address;
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auto CopyVal(const Value* val, int line_num) -> const Value*;
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auto ToInteger(const Value* v) -> int;
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/***** Interpreters *****/
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auto InterpProgram(std::list<Declaration>* fs) -> int;
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auto InterpExp(Env env, Expression* e) -> const Value*;
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} // namespace Carbon
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#endif // EXECUTABLE_SEMANTICS_INTERPRETER_INTERPRETER_H_
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