mirror of
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.
110 lines
2.5 KiB
C++
110 lines
2.5 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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#include <iostream>
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#include <iterator>
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#include <map>
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#include <optional>
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#include <utility>
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#include <vector>
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#include "executable_semantics/ast/expression.h"
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#include "executable_semantics/ast/function_definition.h"
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#include "executable_semantics/interpreter/interpreter.h"
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#include "executable_semantics/interpreter/stack.h"
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#include "executable_semantics/interpreter/typecheck.h"
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namespace Carbon {
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void PrintAct(Action* act, std::ostream& out) {
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switch (act->tag) {
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case ActionKind::DeleteTmpAction:
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std::cout << "delete_tmp(" << act->u.delete_tmp << ")";
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break;
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case ActionKind::ExpToLValAction:
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out << "exp=>lval";
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break;
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case ActionKind::LValAction:
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case ActionKind::ExpressionAction:
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PrintExp(act->u.exp);
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break;
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case ActionKind::StatementAction:
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PrintStatement(act->u.stmt, 1);
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break;
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case ActionKind::ValAction:
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PrintValue(act->u.val, out);
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break;
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}
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out << "<" << act->pos << ">";
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if (act->results.size() > 0) {
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out << "(";
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for (auto& result : act->results) {
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if (result) {
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PrintValue(result, out);
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}
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out << ",";
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}
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out << ")";
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}
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}
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void PrintActList(Stack<Action*> ls, std::ostream& out) {
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if (!ls.IsEmpty()) {
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PrintAct(ls.Pop(), out);
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if (!ls.IsEmpty()) {
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out << " :: ";
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PrintActList(ls, out);
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}
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}
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}
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auto MakeExpAct(Expression* e) -> Action* {
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auto* act = new Action();
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act->tag = ActionKind::ExpressionAction;
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act->u.exp = e;
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act->pos = -1;
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return act;
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}
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auto MakeLvalAct(Expression* e) -> Action* {
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auto* act = new Action();
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act->tag = ActionKind::LValAction;
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act->u.exp = e;
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act->pos = -1;
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return act;
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}
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auto MakeStmtAct(Statement* s) -> Action* {
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auto* act = new Action();
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act->tag = ActionKind::StatementAction;
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act->u.stmt = s;
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act->pos = -1;
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return act;
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}
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auto MakeValAct(const Value* v) -> Action* {
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auto* act = new Action();
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act->tag = ActionKind::ValAction;
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act->u.val = v;
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act->pos = -1;
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return act;
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}
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auto MakeExpToLvalAct() -> Action* {
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auto* act = new Action();
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act->tag = ActionKind::ExpToLValAction;
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act->pos = -1;
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return act;
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}
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auto MakeDeleteAct(Address a) -> Action* {
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auto* act = new Action();
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act->tag = ActionKind::DeleteTmpAction;
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act->pos = -1;
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act->u.delete_tmp = a;
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return act;
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}
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} // namespace Carbon
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