小编Mar*_*rco的帖子

function recursiveSplit($string, $layer) {
    $err = preg_match_all("/\{(([^{}]*|(?R))*)\}/",$string,$matches);
    echo "Elementi trovati: $err<br>";
    if($err == FALSE) echo "preg_match_all ERROR<br>";

    // iterate thru matches and continue recursive split
    if (count($matches) > 1) {
        for ($i = 0; $i < count($matches[1]); $i++) {
            if (is_string($matches[1][$i])) {
                if (strlen($matches[1][$i]) > 0) {
                    echo "<pre>Layer ".$layer.":   ".$matches[1][$i]."</pre><br />";
                    recursiveSplit($matches[1][$i], $layer + 1);
                }
            }
        }
    }
}

$buffer = "{aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa{aaaaaaaaaaaaaaaaaa{aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa}";
recursiveSplit($buffer, 0);

产量

Elementi trovati: 
preg_match_all ERROR
Backtrack limit was exhausted!

此代码给出了PREG_BACKTRACK_LIMIT_ERROR错误...但回溯限制设置为100.000.000.

这是我第一次使用正则表达式,我真的不知道如何解决它.

非常感谢,Marco

今天我想尝试将我的项目从visual c ++ 2010带到visual c ++ 2013.

我在visual c ++ 2013中遇到了这个错误,这是我在编译2010版时没有得到的.

//somewhere in the SimpleObject_list class
std::unordered_map<std::string, SimpleObject *> Object_list; 


//method which is giving me the error
void SimpleObject_list::Add(const char *Object_name, SimpleObject * Object_pointer){
    cout << "SimpleObject listed as: " << Object_name << endl;
    Object_list.insert(std::make_pair<std::string,SimpleObject *>(Object_name, Object_pointer));
}

错误是:

error C2664: 'std::pair<std::basic_string<char,std::char_traits<char>,std::allocator<char>>,SimpleObject *> std::make_pair<std::string,SimpleObject*>(_Ty1 &&,_Ty2 &&)' : cannot convert argument 2 from 'SimpleObject *' to 'SimpleObject *&&'

我究竟做错了什么？为什么我在vc ++ 2010中没有出现任何错误？

谢谢