Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. QString as parameter in switch case
Forum Updated to NodeBB v4.3 + New Features

QString as parameter in switch case

Scheduled Pinned Locked Moved General and Desktop
2 Posts 2 Posters 13.6k Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • I Offline
    I Offline
    Indrajeet
    wrote on last edited by
    #1

    Hi All

    Is there any way to use QString as a parameter in switch case as shown below.
    @
    QString str;
    switch(str)
    {
    case "A":
    break;
    case "B":
    break;
    }
    @

    1 Reply Last reply
    0
    • D Offline
      D Offline
      dbzhang800
      wrote on last edited by
      #2

      You can use an string as the condition of switch statement, as long as the string class provide an operator such as:

      bq.
      operator int() const

      But, you cannot code something like this!!

      bq.
      case "A":

      From ISO C++ 6.4:

      bq.
      The value of a condition that is an initialized declaration in a switch statement is the value of the declared variable if it has integral or enumeration type, or of that variable implicitly converted to integral or enumeration type otherwise.

      From ISO C++ 6.4.2

      bq.
      Any statement within the switch statement can be labeled with one or more case labels as follows:
      case constant-expression :
      where the constant-expression shall be an integral constant.

      1 Reply Last reply
      0

      • Login

      • Login or register to search.
      • First post
        Last post
      0
      • Categories
      • Recent
      • Tags
      • Popular
      • Users
      • Groups
      • Search
      • Get Qt Extensions
      • Unsolved