C++ (Cpp) Executer::Execute Examples

Example #1

File: main.cpp Project: nacitar/old-projects

void main(void)
{

    Lexer objLex;
    objLex.Init();

    while (true)
    {
        string strInput = "";
        while (strInput.empty())
        {
            cout << "Input a filename or 'q' to quit: ";
            if  (!getline(cin,strInput) || strInput == "q")
            {
                strInput = "";
                break;
            }
        }
        // User typed "q" if it's empty (got here with "break")
        if (strInput.empty()) break;
        if (!objLex.Open(strInput.c_str()))
        {
            cout << "Error opening file: " << strInput << endl;
            continue;
        }
        Parser objParse(&objLex);
        bool created = false;
        try
        {
            if (objParse.Validate())
            {
                created = true;
                Executer exe;
                exe.Execute(objParse.lstParseTree);
                //cout << exe.symTable << endl << endl;
                vector<DataValue>::iterator it;
            }
            else
            {
                cout << "Invalid source file, parse tree was not created." << endl;
            }
        } catch (Token objToken)
        {
            cout << "Lexer Error: " << objToken.dtValue << endl;
        }
        /*if  (!created)
        {
        	string strTemp;
        	do
        	{
        		cout << "Would you like to view the partial parse-tree (y/n)? ";
        		cin >> strTemp;
        		cin.ignore();
        		cin.clear();
        	} while (strTemp!="y"&&strTemp!="Y"&&strTemp!="n"&&strTemp!="N");
        	if  (tolower(strTemp[0]) == 'y')
        		objParse.PrintTree(cout);
        }*/
        objLex.Close();
        cout << "End of file." << endl;
    }
}