Exemplo n.º 1
0
Token Scanner::moveP(){
	char c;
	//Skipping Whitespaces
	while (std::cin.peek() == ' ' || std::cin.peek()=='\t')
		c = getchar();

	while ((c = getchar()) != -1)
	{

		switch (c)
		{
		case '+':
			return  T_PLUS;
		case '-':
			return T_MINUS;
		case '*':
			return (std::cin.peek() == '*' && getchar()) ? T_EXP : T_MULTIPLY;
		case '/':
			return T_DIVIDE;
		case '%':
			return T_MODULO;
		case '(':
			return T_OPENPAREN;
		case ')':
			return T_CLOSEPAREN;
		case ';':
			return T_SEMICOLON;
		case '\n':
			line++;
			return T_NEWLN;
		case EOF:
			return T_EOF;
		default:
			if (isdigit(c))
			{
				std::string number(1, c);
				while (isdigit(std::cin.peek()))
				{
					number += getchar();
				}
				try{
					
					value = std::stoi(number);
				}
				catch (std::exception e){
					std::cerr << "Semantic error: number " << number << " out of bounds at line " << line << std::endl;
					exit(1);
					
				}
				return T_NUMBER;
			}
			else
				scanError(line, c);

		}
	}
	return T_EOF;

}
void Scanner::eatToken(token toConsume) {
    // This function consumes the next token.
    
    token foundToken = nextToken();
    
    if( foundToken == toConsume) 
      
      switch(toConsume) {
        case T_MINUS:
        case T_PLUS:
        case T_MULTIPLY:
        case T_DIVIDE:
        case T_SEMICOLON:
        case T_M:
        case T_EQUALS:
        case T_OPENPAREN:
        case T_CLOSEPAREN:
        case T_OPENBRACKET:
        case T_CLOSEBRACKET:
          std::cin.get();
          break;
        
        case T_POWER:
          std::cin.get();
          std::cin.get();
          break;
        
        case T_NUMBER:
        
        int temp;
        number = (std::cin.get() - 48);
                
        while ( isdigit(std::cin.peek()) ) { 
         temp = std::cin.get();
         temp = temp - 48;
         number = ((number * 10) + temp); 
                                 
         }          
          break;
         
         case T_PRINT:
           std::string print = "print";
           std::string cap_print = "PRINT";
           char p;
           for(int i = 0; i < 5; i++) {
             p = std::cin.get();
             if ((print[i] == p)  || (cap_print[i] == p)) continue;
             else 
               scanError(lineNumber(), p);
            }
           break;
        }
     
     else {
       mismatchError(lineNumber(), toConsume, foundToken);
       
     }
}
Exemplo n.º 3
0
void Tst_qofonoTest::testScan()
{
    QOfonoManager manager;
    QOfonoModem modem;
    modem.setModemPath(manager.modems()[0]);
    QOfonoNetworkRegistration netreg;
    netreg.setModemPath(manager.modems()[0]);

    QSignalSpy spy_scanFinished(&netreg, SIGNAL(scanFinished()));
    QSignalSpy spy_scanError(&netreg, SIGNAL(scanError(QString)));

    netreg.scan();
    ::waitForSignal(&netreg, SIGNAL(scanFinished()), 1000 * 500);

    QCOMPARE(spy_scanError.count(),0);
    QCOMPARE(spy_scanFinished.count(),1);

}
token Scanner::nextToken() {
    // This is a placeholder token, you will need to replace this code
    // with code to return the correct next token.
    
    char peek;
    
    while ( isspace(peek = std::cin.peek()) ) { //check to see if nextToken is whitespace
      if(peek == '\n') line_Number++;
      std::cin.get();                          //if so, consume
    }
    
    char c;
    c = std::cin.peek();
     
     switch (c) {
        case '-':
            return T_MINUS;
            
        case '+':
        	return T_PLUS;
        
        case '*':
            std::cin.get();
            char temp;
            temp = std::cin.peek();
            std::cin.putback ('*');
            
            if(temp == '*') return T_POWER;
            else 
              return T_MULTIPLY;
        
        case '/':
        	return T_DIVIDE;
        
        case ';':
        	return T_SEMICOLON;
       
        case 'M':	
        case 'm':
        	return T_M;
        	
        case '[':
        	return T_OPENBRACKET;
        	
        case ']':
        	return T_CLOSEBRACKET;
        	
        case '(':
        	return T_OPENPAREN;
        	
        case ')':
        	return T_CLOSEPAREN;
        	
        case '=':
        	return T_EQUALS;
        
        case 'P':
        case 'p':
            return T_PRINT;
        
        case '0':
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
             return T_NUMBER;
            
        case EOF:
            return T_EOF;
        
        default:
            scanError(lineNumber(),c);
            break;
    }
    
}