public static ExprStatement TryParse(ref Source s)
{
ExprStatement res = null;
Spaces.Skip(ref s);
Expression expr = new Expression(ref s);
if (expr.Correct())
{
res = new ExprStatement(expr);
}
Spaces.Skip(ref s);
if (!s.SkipIf(";"))
{
s.Rollback();
return(null);
}
return(res);
}
public static Statement TryParseAny(ref Source s)
{
Spaces.Skip(ref s);
Statement res;
s.Save();
res = If.TryParse(ref s);
if (res == null)
{
s.Rollback();
res = While.TryParse(ref s);
}
if (res == null)
{
s.Rollback();
res = Return.TryParse(ref s);
}
if (res == null)
{
s.Rollback();
res = Assignment.TryParse(ref s);
}
if (res == null)
{
s.Rollback();
res = ExprStatement.TryParse(ref s);
}
if (res == null)
{
s.Rollback();
s.SkipIf(";");
}
s.Check(res);
return(res);
}