It's worthy of noting that occasionally you need to do want non-configurable "hard-coded" figures in the code. There are a number of well known types including 0x5F3759DF which can be Employed in the optimized inverse square root algorithm.
If by STL you imply only the template part of the C++ Common Library, then it can be beautifully probable to implement it without any "magic".
My level though was to spotlight that with regard to magic figures, the maintainability of the code is A serious situation, specifically when if you don't know it's function you would possibly change or utilize a magic range, with unintended side effects Subsequently.
Recognition of "Pi" as a name is really a merely a handy reward, but will not be the first reason behind obtaining the frequent.
Any previous Edition of C++ compilers would not have the ability to deal with the STL, Nearly any newer C++ compiler would. So thats like Co-Evolution.
mock magic solutions but you have to define them. MagicMock has "default implementations of a lot of the magic approaches.".
We might halt right here and say that 2 is ok On this context and there's nothing else we have to know. Nonetheless, perhaps within our software program universe this isn't the whole Tale. There's additional to it, but "padding = 2" as being a context simply cannot reveal it.
Like gbjbaanb the right way mentioned, the STL is often applied in simple C++, without the need of depending on almost any compiler "magic".
Folks often just take magic amount elimination more, by shifting these constants into separate data files to act as configuration. This is typically valuable, but might also generate more complexity than it's really worth.
One example is, You may have a magic number of 0x12345678. If the thing is that magic variety, it's a fair guess you are seeing a file of the proper format. If you see, on the other hand, 0x78563412, it is a reasonable guess that you're looking at an endian-swapped Model of the identical file format.
It goes into a little depth about all of the ways the magic selection reference is designed. Here is a quote about magic quantity as a foul programming exercise The expression magic amount also refers to the lousy programming exercise of utilizing quantities specifically in resource code devoid of clarification.
A: A person affordable response would be that the way MagicMock functions is usually that it preconfigures all these protocol strategies by developing new Mocks and location them, so if each and every new mock made a lot of new mocks and set All those as protocol methods then all those protocol solutions produced a bunch a lot more mocks and established them on their protocol solutions, you've got infinite recursion...
. The normal library is permitted to utilize them, however , you and I are certainly not. So in the event you ended up going to put in writing your own STL implementation, you must make some insignificant alterations, but that's not as a result of any magic, simply a way to prevent identify clashes between the common library and consumer code. Share Improve this response magic Abide by
In programming, a "magic quantity" is a worth that needs to be provided a symbolic title, but was alternatively slipped in the code being a literal, typically in more than one place.