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Geoff RomerandJon Meow
6ac3adfa53
`Pattern` is intended to pilot some changes I would like to apply to all our sum types: - The alternatives are expressed as derived classes rather than members of a `std::variant`. - The alternatives are classes in the [style guide sense](https://google.github.io/styleguide/cppguide.html#Structs_vs._Classes), meaning they can have invariants, but can't have public data members. - Creating an object is expressed using a constructor rather than a factory function. - Accessing an alternative is expressed as a cast (using LLVM's RTTI system) rather than `std::get` or a `Get` method. Co-authored-by: Jon Meow <46229924+jonmeow@users.noreply.github.com>
45 lines
1.3 KiB
C++
45 lines
1.3 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 "common/ostream.h"
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#include "executable_semantics/ast/declaration.h"
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#include "executable_semantics/ast/expression.h"
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#include "executable_semantics/ast/pattern.h"
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#include "executable_semantics/interpreter/frame.h"
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#include "executable_semantics/interpreter/heap.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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struct State {
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Stack<Frame*> stack;
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Heap heap;
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};
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extern State* state;
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void InitEnv(const Declaration& d, Env* env);
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void PrintStack(const Stack<Frame*>& ls, llvm::raw_ostream& out);
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void PrintEnv(Env values);
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/***** Interpreters *****/
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auto InterpProgram(std::list<Declaration>* fs) -> int;
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auto InterpExp(Env values, const Expression* e) -> const Value*;
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auto InterpPattern(Env values, const Pattern* p) -> const Value*;
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} // namespace Carbon
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#endif // EXECUTABLE_SEMANTICS_INTERPRETER_INTERPRETER_H_
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