Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>The const keyword in C++ (as applied to parameters and type declarations) is an attempt to keep programmers from shooting off their big toe and taking out their whole leg in the process.</p> <p>The basic idea is to label something as "cannot be modified". A const type can't be modified (by default). A const pointer can't point to a new location in memory. Simple, right?</p> <p>Well, that's where const correctness comes in. Here are some of the possible combinations you can find yourself in when you use const:</p> <p><strong>A const variable</strong> Implies that the data labeled by the variable name cannot be modified.</p> <p><strong>A pointer to a const variable</strong> Implies that the pointer can be modified, but the data itself cannot.</p> <p><strong>A const pointer to a variable</strong> Implies that the pointer cannot be modified (to point to a new memory location), but that the data to which the pointer points <em>can</em> be modified.</p> <p><strong>A const pointer to a const variable</strong> Implies that neither the pointer nor the data to which it points can be modified. </p> <p>Do you see how some things can be goofy there? That's why when you use const, it's important to be correct in which const you are labeling.</p> <p>The point is that this is just a compile-time hack. The labeling just tells the compiler how to interpret instructions. If you cast away from const, you can do whatever you want. But you'll still have to call methods that have const requirements with types that are cast appropriately. </p>
    singulars
    1. This table or related slice is empty.
    1. POWhy is const-correctness specific to C++?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USRandolpho
    1. USRandolpho
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTDownMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload