[antlr-interest] Re: C++ input
Ric Klaren
klaren at cs.utwente.nl
Thu Mar 21 01:42:23 PST 2002
On Thu, Mar 21, 2002 at 09:31:04AM -0000, kordeul wrote:
> I use version 2.7.1 of ANTLR and there's no main2.cpp in the
> cpp/calc example. Can you write the actual code?
As I said in the 2.7.2a1 distribution but anyway..
It's stripped from all the fluff (error handling, namespace stuff and some
other details)
int main( int argc, char*argv[] )
{
// write the argv strings to a ostringstream...
ostringstream expr;
for( int i = 1; i < argc; i++ )
{
if( i > 1 && i != (argc-1))
expr << ' ';
expr << argv[i];
}
istringstream input(expr.str()); // prepare istringstream with input
CalcLexer lexer(input);
CalcParser parser(lexer);
parser.expr();
}
With a file:
ifstream input("somefile.txt");
And then use Lexer and parser as above.
> Also I forgot to mention: I use Borland C++ Builder 5 if this
> changes something.
Dunno if C++ builder has istringstream support if not you'd better search
the archives for the CharInputBuffer stuff.
Ric
--
-----+++++*****************************************************+++++++++-------
---- Ric Klaren ----- klaren at cs.utwente.nl ----- +31 53 4893722 ----
-----+++++*****************************************************+++++++++-------
Wit is cultured insolence. --- Aristotle
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
More information about the antlr-interest
mailing list