Congratulations to the D Team!

[Max Samukha]

On Wednesday, 11 July 2012 at 15:57:51 UTC, Andrei Alexandrescu 
wrote:
> On 7/11/12 11:50 AM, Max Samukha wrote:
>> On Wednesday, 11 July 2012 at 15:28:41 UTC, Andrei 
>> Alexandrescu wrote:
>>> On 7/11/12 11:11 AM, Max Samukha wrote:
>>>> On Wednesday, 11 July 2012 at 12:39:03 UTC, Andrei 
>>>> Alexandrescu wrote:
>>>>
>>>>>
>>>>> I gave evidence on a large, high quality C++ codebase that 
>>>>> the use of
>>>>> mutable (which is the solution of choice for memoization, 
>>>>> caching, and
>>>>> lazy computation) is extremely scarce.
>>>>>
>>>>> What evidence do you have for your prediction?
>>>>>
>>>>>
>>>>> Andrei
>>>>
>>>> Qt codebase (large, high quality) has around 1500 'mutable' 
>>>> keyword
>>>> occurrences.
>>>
>>> How many lines total?
>>>
>>> Andrei
>>
>> 1512. Obtained by grepping the src directory of Qt 4.8.0, so 
>> the number
>> includes duplicates, comments, etc. I think that even if the 
>> actual
>> number is lower by an order, some 100 types using mutable 
>> still do not
>> qualify for 'extremely scarce'. If I have time (which is 
>> unlikely), I
>> will probably analyse the codebase for the actual number.
>
> I was asking about total number of C++ code lines. In our 
> codebase we have one use of "mutable" per 7659 lines of C++ 
> code (as grep and wc count).
>
> Andrei

Sorry, I misunderstood the question. As I said earlier, the 
relative number of lines with 'mutable' is mostly irrelevant. 
What is more relevant is the ratio of types defining at least one 
mutable member to the total number of types.