1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
//===- 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/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(), std::string(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;
}
|
