Converting QString to const char* ?

[part-time roadman]

I need to convert QString to const char* reliably so I can use lua_pushstring() which only takes const char* as an argument. Is there a way to do this?

thestring.toStdString().c_str()  /// Also doing this breaks the string and returns this unknown □ thing in place of the actual string.

Or alternatively is there a way to display std::strings on UIs instead of QString?

[SGaist]

Hi,

@part-time-roadman said in Converting QString to const char* ?:

thestring.toStdString().c_str() /// Also doing this breaks the string and returns this unknown □ thing in place of the actual string.

You are taking the address of the first char of the temporary std::string returned by toStdString. Store the result of toStdString and then use that.

You can convert your std::string to QString for the UI part.

[jsulm]

@part-time-roadman said in Converting QString to const char* ?:

Or alternatively is there a way to display std::strings on UIs instead of QString?

Which UIs?
What is your use case actually?
You can always convert std::string to QString.

How to convert QString to char* depends on ecoding of your QString.
Take a look at various QString::to*() methods.

[part-time roadman]

Alright how would I convert std::string to QString?

[jsulm]

@part-time-roadman Easy to find in the documentation: https://doc.qt.io/qt-5/qstring.html#fromStdString