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//===- toyc.cpp - The Toy Compiler ----------------------------------------===//
//
// Copyright 2019 The MLIR Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// =============================================================================
//
// This file implements the entry point for the Toy compiler.
//
//===----------------------------------------------------------------------===//
#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"
using namespace toy;
namespace cl = llvm::cl;
static cl::opt<std::string> inputFilename(cl::Positional,
cl::desc("<input toy file>"),
cl::init("-"),
cl::value_desc("filename"));
namespace {
enum Action { None, DumpAST };
}
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) {
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> fileOrErr =
llvm::MemoryBuffer::getFileOrSTDIN(filename);
if (std::error_code ec = fileOrErr.getError()) {
llvm::errs() << "Could not open input file: " << ec.message() << "\n";
return nullptr;
}
auto buffer = fileOrErr.get()->getBuffer();
LexerBuffer lexer(buffer.begin(), buffer.end(), filename);
Parser parser(lexer);
return parser.parseModule();
}
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, "toy compiler\n");
auto moduleAST = parseInputFile(inputFilename);
if (!moduleAST)
return 1;
switch (emitAction) {
case Action::DumpAST:
dump(*moduleAST);
return 0;
default:
llvm::errs() << "No action specified (parsing only?), use -emit=<action>\n";
}
return 0;
}
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