lib/jison/jison.js
function addSymbol (s) {
        if (s && !symbols_[s]) {
            symbols_[s] = ++symbolId;
            symbols.push(s);
        }
    }
function addSymbol (s) {
        if (s && !symbols_[s]) {
            symbols_[s] = ++symbolId;
            symbols.push(s);
        }
    }
function addSymbol ( s ) { if ( s && ! symbols_ [ s ] ) { symbols_ [ s ] = ++ symbolId ; symbols . push ( s ) ; } }
has error recovery
has error recovery