static void Main(string[] args)
{
// TODO Later: コマンド解析処理
if (args.Length != 1)
{
CompileError.Error("The number of command line argument must be 1.", true);
}
// TODO Later: ソースファイルのInput
var code = args[0];
var context = new Context(code);
var node = new ProgramNode();
node.Parse(context);
var gen = new AssemblyGeneratorFactory().Create <X8664GenerateVisitor>();
gen.Generate(node);
// Epilogue
gen.Add(" pop rax");
gen.Add(" mov rsp, rbp");
gen.Add(" pop rbp");
gen.Add(" ret");
gen.PutAll();
}
/// <summary>
/// When the current token is a number, it consumes one token and returns that number.
/// Otherwise it reports an error.
/// </summary>
public int ExpectNumber()
{
if (this.CurrentToken.TokenKind != TokenKind.NUMERIC)
{
CompileError.Error("Expect number", true);
}
var val = int.Parse(this.CurrentToken.TokenString);
this.AdvanceToken();
return(val);
}
/// <summary>
/// When the current token kind is the expected kind, it consumes one token and returns that token.
/// Otherwise it reports an error.
/// </summary>
public Token Expect(TokenKind tokenKind)
{
if (this.CurrentToken.TokenKind != tokenKind)
{
CompileError.Error("Expect Error", true);
}
var retval = this.CurrentToken;
this.AdvanceToken();
return(retval);
}
private Token[] Tokenize()
{
var tokens = new List <Token>();
for (var p = 0; this.Text.Length > p;)
{
// Skip character
if (SkipChars.Contains(this.Text[p]))
{
p++;
continue;
}
// Muliti-letter punctuator
if (this.Text.Length - p >= 2)
{
var mlp = this.Text.Substring(p, 2);
if (ExistsKey(mlp))
{
var tk = ReverseReference(mlp);
tokens.Add(new Token(tk, mlp));
p += 2;
continue;
}
}
// Single-letter punctuator
if (ExistsKey(this.Text[p].ToString()))
{
var tk = ReverseReference(this.Text[p].ToString());
tokens.Add(new Token(tk, this.Text[p].ToString()));
p++;
continue;
}
// Integer literal
var len = DigitLength(this.Text.Substring(p));
if (len > 0)
{
var token = new Token(TokenKind.NUMERIC, this.Text.Substring(p, len));
tokens.Add(token);
p += len;
continue;
}
// Identifier or keyword
if (this.IsAllowedCharacter(this.Text[p]))
{
var builder = new StringBuilder();
for (; this.IsAllowedCharacter(this.Text[p]); p++)
{
builder.Append(this.Text[p]);
}
var word = builder.ToString();
// Keyword
if (ExistsKey(word))
{
var tk = ReverseReference(word);
tokens.Add(new Token(tk, word));
continue;
}
// Identifier
var token = new Token(TokenKind.IDENTIFIER, word);
tokens.Add(token);
continue;
}
CompileError.Error("Couldn't tokenize.", true);
}
tokens.Add(new Token(TokenKind.EOF, "EOF"));
return(tokens.ToArray());
}