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https://github.com/carbon-language/carbon-lang.git
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Geoff Romer
d71f5b1784
This enables the interpreter logic to express its intent more directly, especially in the common cases, and enables us to get rid of ValAction. It's also a step toward simplifying and encapsulating `state->stack`.
52 lines
1.6 KiB
C++
52 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 <optional>
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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<Ptr<Frame>> stack;
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Heap heap;
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std::optional<const Value*> program_value;
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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, llvm::raw_ostream& out);
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/***** Interpreters *****/
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// Attempts to match `v` against the pattern `p`. If matching succeeds, returns
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// the bindings of pattern variables to their matched values.
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auto PatternMatch(const Value* p, const Value* v, int line_num)
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-> std::optional<Env>;
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auto InterpProgram(const std::list<Ptr<const 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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