Stepping back and looking at constness from another angle.

[Craig Black]

Guess I should put in my 2 cents also, since there are so many people who 
seem to dislike the idea of const in D.  I am a C++ programmer that uses 
const a lot.  I am the primary author of a very big API that is used by 
other developers.

There are cases where things get complicated, but for the most part, const 
really helps.  It helps that the compiler enforces the rules.  So I like the 
idea of adding const to D in some form.  I admit I don't understand all the 
details of D's const implementation, but I don't think that adding const in 
D is a bad thing.

Walter said himself that the next release of D will be alpha, so changes can 
be made if necessary.  Therefore, I would consider the current approach to 
const to be a first draft.

D's const implementation seems much more thought-out than C++'s. 
Personally, I am excited to see what this feature will give us.

-Craig