It's really worth noting that from time to time you do want non-configurable "hard-coded" figures in your code. There are a variety of famed ones like 0x5F3759DF that's used in the optimized inverse sq. root algorithm.
By way of example, they may insert non-typical code that assures improved mistake messages, Or maybe performs all-around some flaw within their compiler, Or possibly enables special optimizations by using further options of that distinct compiler.
Again and again, The solution is not really black and white, but has shades of misunderstood that means and objective, velocity of learning, and speed of comprehension. You can find also a must see the way it connects for the software device all-around it.
Listed here "2" is a "magic" number, which happens to be factored out to your symbolic consistent default_padding within the context of your GUI UX of "my method" so as to ensure it is use as default_padding rapidly understood during the larger context on the enclosing code.
Following tests most alternatives with out altering the supply-code, I discovered the next to receive python-magic Operating out with the box:
Regardless of whether Just about every specified implementation truly employs any "magic" is a unique problem (there are portions of STL where by "magic" would assist, but not Definitely expected).
user2916464user2916464 50122 gold badges88 silver badges1616 bronze badges 1 five That does not sound right to me. I prefer to use The only Resource that fits my needs. Not the a person with by far the most bells and whistles that I don't know whether or not they are handy or not.
Should you feel that this question is usually enhanced And perhaps reopened, go to the assistance Heart for assistance. Closed twelve several magic years ago.
– mtvec Commented Aug 26, 2010 at thirteen:04 three well, These usually are not in the current Model of the standard. They're scheduled for inclusion in C++0x (and promptly skimming the draft didn't produce any facts on how they might be carried out, so you may be proper which they require compiler magic to put into action -- Conversely, their only objective then is to reveal this compiler magic so regular builders might utilize it. They do not maintain it to by themselves like @Position's Java examples do.)
I am even now an active MAGIC Developer... Here is the old identify utilised and its a completely unique paradigm like a number of you talked about. I've been producing it from Magic Edition eight.x to eDeveloper nine.x to 10.x then renamed to UniPAAS. The more recent Variation is less difficult to make use of and it remains really RAD in the perception that there is little if any code you compose... a lot of the prevalent programming duties like IO, SQL command.
Does The fundamental worth Have a very semantic or function associations with other primary values in unique contexts?
I have normally utilised the term "magic variety" differently, being an obscure value saved within a facts structure that may be verified as A fast validity Examine. Such as gzip information contain 0x1f8b08 as their 1st three bytes, Java class data files begin with 0xcafebabe, etcetera.
As Jalf mentions, making use of these names operates the danger that your code will likely have title clashes with the libraries A part of your compiler (or An additional a person when somebody else tried to compile your code), so definitely utilizing them is a foul thought.
C++0x requires it one move even further and offers variations of such sort qualities that actually get the job done accurately in all circumstances. And that can only be finished by way of some unspecified method of compiler guidance.