public String match ( CharSequence text ) { try { if ( text . length ( ) == 0 ) { if ( acceptEmpty ) { return "" ; } else { throw new SyntaxErrorException ( "empty string not accepted" ) ; } } InputReader reader = Input . getInstance ( text ) ; int rc = match ( reader ) ; if ( rc == 1 && reader . read ( ) == - 1 ) { return reader . getString ( ) ; } else { throw new SyntaxErrorException ( "syntax error" + "\n" + reader . getLineNumber ( ) + ": " + reader . getLine ( ) + "\n" + pointer ( reader . getColumnNumber ( ) + 2 ) ) ; } } catch ( IOException ex ) { throw new IllegalArgumentException ( "can't happen" ) ; } }
Attempts to match input to regex