QString in switch statement

[ankit thakar]

Can't we use QString for comparision in switch statement like below,

QString str = "TEMP";

switch (str)
{

I tried to use like this but it didnot work.

[kshegunov]

@ankit-thakar
No, C++ doesn't allow for non-integral types in switch statements.

Kind regards.

[beecksche]

@ankit-thakar

When you want to use a String in a switch statement, you obviosily know which String can be entered. In this case you can use enums.

enum Strings { String1, String2, etc. }

With this enums you're allowed to use the switch statement. Like

Strings myString;

switch (myString)
{
 case Strings::String1:
  break;
 case Strings::String2:
  break;
 ...
 default:
  break;
}

So you can use the switch and it is readable in your code.

[kshegunov]

@beecksche
The inefficient part would be converting the string you have to a corresponding enum, and this pretty much defeats the whole purpose of having a duplicating enum and a switch construct.

[Violet Giraffe]

Just use

if (str == "...")
{
   // ...
}
else if (str == "...")
{
   // ...
}
//...
else 
{
    // ...
}