static void Main(string[] args)
{
foreach (var fn in args)
{
if (!File.Exists(fn))
{
Console.WriteLine("cannot find file: {0}", fn);
}
string src = File.ReadAllText(fn);
/// Stage 1: lexer.
ReadOnlyCollection <T> tokens;
try {
tokens = new ReadOnlyCollection <T>(Lexer.Instance.Scan(src));
} catch (LexerException e) {
Console.WriteLine(e.Message);
return;
}
/// Stage 2: parser.
Parser.Env.Clear();
var stream = new TokenStream <T>(tokens);
var results = P.TranslationUnit().End()(stream);
if (results.Count() == 0)
{
Console.WriteLine("Parser Error: parsing failed");
return;
}
if (results.Count() > 1)
{
Console.WriteLine("Parser Error: ambiguity");
return;
}
/// Stage 3: type check and build ast.
AST.Node ast = null;
try {
ast = results.First().Value.ToAST(new SyntaxTree.Env());
} catch (Error e) {
Console.WriteLine(e.Message);
return;
}
/// Stage 4: code generation and write to file.
var gen = new X86Gen();
ast.ToX86(gen);
if (fn.Length > 2 && fn.Substring(fn.Length - 2) == ".c")
{
File.WriteAllText(fn.Substring(0, fn.Length - 2) + ".s", gen.ToString());
}
else
{
File.WriteAllText(fn + ".s", gen.ToString());
}
}
}