llvm/mlir/examples/toy/Ch1/toyc.cpp

//===- toyc.cpp - The Toy Compiler ----------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the entry point for the Toy compiler.
//
//===----------------------------------------------------------------------===//

#include "toy/AST.h"
#include "toy/Lexer.h"
#include "toy/Parser.h"

#include "llvm/ADT/StringRef.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <memory>
#include <string>
#include <system_error>

usingnamespacetoy;
cl;

static cl::opt<std::string> inputFilename(cl::Positional,
                                          cl::desc("<input toy file>"),
                                          cl::init("-"),
                                          cl::value_desc("filename"));
namespace {
enum Action { … };
} // namespace

static cl::opt<enum Action>
    emitAction("emit", cl::desc("Select the kind of output desired"),
               cl::values(clEnumValN(DumpAST, "ast", "output the AST dump")));

/// Returns a Toy AST resulting from parsing the file or a nullptr on error.
std::unique_ptr<toy::ModuleAST> parseInputFile(llvm::StringRef filename) { … }

int main(int argc, char **argv) { … }