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