const as default for variables

[Walter Bright via Digitalmars-d]

On 3/14/2015 3:06 PM, Xinok wrote:
> For example, this could be an issue for generic functions:
>
>      void foo(T)(T[] arr){
>          T value = arr[0]; // Mutable or immutable?
>      }

Not really.

     const T value = arr[0];

means that value isn't going to be subsequently reassigned or anything mutated 
through it.

> Also, you forgot a fifth case where only part of the type is const/immutable:
>
> 5. const(T)[] x = ...

The default const'ness would apply to the [] part.