replace the character ' with \' in the QString.

[Sebastian]

Dear Qt guys,
May be this is really a silly question but i am still could not find the solutions.
I have string there i have to replace some charaters.

QString = Book + ' '+ Pen;

I have to replace the " ' "with the characters " \ ' "

I tried with lots of code

formulaString.replace("'", "\'");
formulaString.replace("\'", "\\'");
formulaString.replace("\'", "/\'");

but nothing worked.Please suggest me any solution if you have
TIA

[koahnig]

@Sebastian

When you need to have a special character in string you have to prepend with a backslash as you know obviously already. The confusion comes typically because backslash is also such a character.

formulaString.replace("\'", "\\\'");

The examples of [QRegularExpressions](formulaString.replace("'", "\'") and playing a bit may help.

[koahnig]

Was just wondering if there is not some help around.

Check out QRegularExpression::escape

[Sebastian]

@koahnig :Thanks for your reply.This i alreday tried.

[VRonin]

Since we all agreed that escape sequences are a pain in the 🍑 C++11 introduced raw string literals:

formulaString.replace(R"(')", R"(\')");

[Sebastian]

Thanks guys i got the the solution.Thanks for your help.Qt provide the functionality what i was looking for.

[Akash1]

@Sebastian , could you please post your resolution here? I need this. Thanks in advanced,

[mrjj]

@Akash1
Its

formulaString.replace("\'", "\\\'");

The odd part was that since \ is special too, it must also be escaped.

or

formulaString.replace(R"(')", R"(\')");

which use the new raw strings and is good if many chars that need escaping.