mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-25 07:30:11 +01:00
Geoff Romer
69b4b0086f
Also make `Stack`'s single-argument constructor explicit, which would have helped catch this at compile time.
114 lines
2.7 KiB
C++
114 lines
2.7 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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namespace {
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struct TagVisitor {
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template <typename Alternative>
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auto operator()(const Alternative&) -> ActionKind {
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return Alternative::Kind;
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}
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};
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} // namespace
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auto Action::tag() const -> ActionKind {
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return std::visit(TagVisitor(), value);
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}
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auto Action::MakeLValAction(const Expression* e) -> Action* {
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auto* act = new Action();
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act->value = LValAction({.exp = e});
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return act;
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}
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auto Action::MakeExpressionAction(const Expression* e) -> Action* {
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auto* act = new Action();
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act->value = ExpressionAction({.exp = e});
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return act;
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}
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auto Action::MakeStatementAction(const Statement* s) -> Action* {
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auto* act = new Action();
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act->value = StatementAction({.stmt = s});
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return act;
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}
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auto Action::MakeValAction(const Value* v) -> Action* {
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auto* act = new Action();
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act->value = ValAction({.val = v});
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return act;
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}
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auto Action::GetLValAction() const -> const LValAction& {
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return std::get<LValAction>(value);
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}
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auto Action::GetExpressionAction() const -> const ExpressionAction& {
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return std::get<ExpressionAction>(value);
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}
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auto Action::GetStatementAction() const -> const StatementAction& {
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return std::get<StatementAction>(value);
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}
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auto Action::GetValAction() const -> const ValAction& {
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return std::get<ValAction>(value);
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}
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void Action::Print(std::ostream& out) {
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switch (tag()) {
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case ActionKind::LValAction:
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PrintExp(GetLValAction().exp);
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break;
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case ActionKind::ExpressionAction:
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PrintExp(GetExpressionAction().exp);
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break;
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case ActionKind::StatementAction:
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PrintStatement(GetStatementAction().stmt, 1);
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break;
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case ActionKind::ValAction:
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PrintValue(GetValAction().val, out);
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break;
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}
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out << "<" << pos << ">";
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if (results.size() > 0) {
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out << "(";
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for (auto& result : 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 Action::PrintList(Stack<Action*> ls, std::ostream& out) {
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if (!ls.IsEmpty()) {
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ls.Pop()->Print(out);
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if (!ls.IsEmpty()) {
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out << " :: ";
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PrintList(ls, out);
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}
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}
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}
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} // namespace Carbon
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