mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
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`.
61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
#include "executable_semantics/interpreter/action.h"
|
|
|
|
#include <iterator>
|
|
#include <map>
|
|
#include <optional>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
#include "executable_semantics/ast/expression.h"
|
|
#include "executable_semantics/ast/function_definition.h"
|
|
#include "executable_semantics/common/arena.h"
|
|
#include "executable_semantics/interpreter/stack.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/Support/Casting.h"
|
|
|
|
namespace Carbon {
|
|
|
|
using llvm::cast;
|
|
|
|
void Action::Print(llvm::raw_ostream& out) const {
|
|
switch (Tag()) {
|
|
case Action::Kind::LValAction:
|
|
out << *cast<LValAction>(*this).Exp();
|
|
break;
|
|
case Action::Kind::ExpressionAction:
|
|
out << *cast<ExpressionAction>(*this).Exp();
|
|
break;
|
|
case Action::Kind::PatternAction:
|
|
out << *cast<PatternAction>(*this).Pat();
|
|
break;
|
|
case Action::Kind::StatementAction:
|
|
cast<StatementAction>(*this).Stmt()->PrintDepth(1, out);
|
|
break;
|
|
}
|
|
out << "<" << pos << ">";
|
|
if (results.size() > 0) {
|
|
out << "(";
|
|
llvm::ListSeparator sep;
|
|
for (auto& result : results) {
|
|
out << sep;
|
|
if (result) {
|
|
out << *result;
|
|
}
|
|
}
|
|
out << ")";
|
|
}
|
|
}
|
|
|
|
void Action::PrintList(const Stack<Ptr<Action>>& ls, llvm::raw_ostream& out) {
|
|
llvm::ListSeparator sep(" :: ");
|
|
for (const auto& action : ls) {
|
|
out << sep << *action;
|
|
}
|
|
}
|
|
|
|
} // namespace Carbon
|