protected internal override void Parse(Lexer lexer, List <ASTree> res)
{
Parser p = choose(lexer);
if (p == null)
{
throw new ParseException(lexer.Peek(0));
}
else
{
res.Add(p.Parse(lexer));
}
}
public void Start()
{
var s = File.ReadAllText("in.txt");
//var s = Console.ReadLine();
LineNumberReader reader = new LineNumberReader(s);
Lexer l = new Lexer(reader);
BasicParser bp = new BasicParser();
while (l.Peek(0) != Token.EOF)
{
ASTree ast = bp.Parse(l);
Console.WriteLine("=> " + ast.ToString());
}
}
private Precedence nextOperator(Lexer lexer)
{
Token t = lexer.Peek(0);
if (t.IsIdentifier)
{
ops.TryGetValue(t.Text, out var ret);
return(ret);
}
else
{
return(null);
}
}
protected internal override bool Match(Lexer lexer)
{
Token t = lexer.Peek(0);
if (t.IsIdentifier)
{
foreach (String token in tokens)
{
if (token.Equals(t.Text))
{
return(true);
}
}
}
return(false);
}
public void Start()
{
BasicParser bp = new BasicParser();
BasicEnv env = new BasicEnv();
var s = File.ReadAllText("in.txt");
//var s = Console.ReadLine();
LineNumberReader reader = new LineNumberReader(s);
Lexer l = new Lexer(reader);
while (l.Peek(0) != Token.EOF)
{
ASTree ast = bp.Parse(l);
if (!(ast is NullStmnt))
{
Object r = ((ASTree)ast).eval(env);
//Console.WriteLine("=> " + ast.ToString());
Console.WriteLine("=> " + r.ToString());
}
}
}
protected internal override bool Match(Lexer lexer)
{
return(Test(lexer.Peek(0)));
}
