QRegExp for removing all non alphanumeric charecters

Using QString I can remove any character from string, but what would be QRegExp to remove ALL non alphanumeric characters from that string. Currently I have written a function that will remove each character one by one, but I would like to know if i can do the same thing only in one step.

Here is my function

Code:

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QString clean(QString str)
{
    str.remove("\"");
    str.remove("\\");
    str.remove(".");
    str.remove(",");
    str.remove("?");
    str.remove("!");
    str.remove("'");
    str.remove("`");
    str.remove("-");
    str.remove("_");
    str.remove("—");
    str.remove("@");
    str.remove("#");
    str.remove("$");
    str.remove("%");
    str.remove("^");
    str.remove("&");
    str.remove("*");
    str.remove("(");
    str.remove(")");
    str.remove("{");
    str.remove("}");
    str.remove("[");
    str.remove("]");
    str.remove("|");
    str.remove(";");
    str.remove(":");
    str.remove("/");
    str.remove(">");
    str.remove("<");
    str.remove("~");
    str.remove("=");
    str.remove("+");
    str.remove(str.fromUtf8("«"));
    str.remove(str.fromUtf8("»"));
    str = str.trimmed();
    return str;
}

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Read the QRegExp class description in QtAssistant.
I guess you want something similar to:

Code:

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str.remove(QRegExp("[^a-zA-Z\\d\\s]"));

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but maybe there is a better way to write it ;)

Thanks for suggestion.
After some reading and trial&error here is the code that works

Code:

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str.remove(QRegExp(QString::fromUtf8("[-`~!@#$%^&*()_—+=|:;<>«»,.?/{}\'\"\\\[\\\]\\\\]")));

---

This will remove all none alphanumeric characters that i know.
If anyone will use this code, save the file in UTF-8, otherwise it will not remove — «»

Seems to be working (Calhal's solution would work only with ascii - no interpunction characters).

Hey, Sorry to revive an old thread.

I am using your solution:

Code:

---

QString Util::cleanQString(QString toClean) {
 
    QString toReturn = toClean;
    toReturn.remove(QRegExp(QString::fromUtf8("[-`~!@#$%^&*()_—+=|:;<>«»,.?/{}\'\"\\\[\\\]\\\\]")));
    return toReturn;
}

---

The compiler is giving me theses 4 warnings that I would like to fix:
warning: C4129: '[' : unrecognized character escape sequence
warning: C4129: ']' : unrecognized character escape sequence
warning: C4129: '[' : unrecognized character escape sequence
warning: C4129: ']' : unrecognized character escape sequence

Using Qt 5.5.0 on VS2013