On 03/25/2014 12:20 PM, Uranuz wrote:
> I have problem with understanding of work of modifiers const, inout,
> immutable modifiers.
I am sure you know these as well, but here is my quick list:
const: "I shall not modify data"
immutable: "I demand immutable data"
inout: "Whatever the actual type qualifier is"
> As I understand inout keyword is intended to consume const,
> immutable and data without modifiers.
Yes. Further, the code is compiled as 'const' (because const is
compatible with mutable, immutable, and const).
> I don't understand what is the purpose of inout.
So that the following function works with any kind of int array:
inout(int)[] first_two(inout(int)[] arr)
{
// (input validation omitted)
return arr[0..2];
}
We don't have to write three overloads just for these qualifiers. (Yes,
templates with constraints can be used as well.)
> Error: cannot implicitly convert expression (&c) of type const(Cookie)*
> to inout(Cookie)*
Your code compiles with the development branch of dmd. What version are
you using?
Ali
