c++ Programming Glossary: necessaryWhat does the explicit keyword in C++ mean? http://stackoverflow.com/questions/121162/what-does-the-explicit-keyword-in-c-mean a compiler error at the function call DoBar 42 . It is now necessary to call for conversion explicitly with DoBar Foo 42 The reason..
What is the difference between the dot (.) operator and -> in C++? http://stackoverflow.com/questions/1238613/what-is-the-difference-between-the-dot-operator-and-in-c bar is the same as foo .bar . The parenthesizes above are necessary because of the binding strength of the and . operators. foo.bar..
What is an undefined reference/unresolved external symbol error and how do I fix it? http://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix new line characters for end of line indicators if necessary. SNIP Each instance of a backslash character immediately followed..
Why aren't my include guards preventing recursive inclusion and multiple symbol definitions? http://stackoverflow.com/questions/14909997/why-arent-my-include-guards-preventing-recursive-inclusion-and-multiple-symbol be a good programming practice because it helps avoiding unnecessary inclusions thus reducing the overall compilation time. However.. by other files in the project can safely #include all the necessary headers to make definitions visible. Header files on the other..
C++ Which is faster: Stack allocation or Heap allocation http://stackoverflow.com/questions/161053/c-which-is-faster-stack-allocation-or-heap-allocation and watching over my shoulder and commented that it wasn't necessary because they are the same performance wise. I was always under..
http://stackoverflow.com/questions/1647631/c-state-machine-design use made of global variables for information passing where necessary. This isn't as bad as it sounds since the FSM is usually locked..
http://stackoverflow.com/questions/3106110/what-is-move-semantics in the first line where we copy x is this deep copy really necessary because we might want to inspect x later and would be very surprised.. heap data didn't have to be copied just moved. It wasn't necessary to copy it because x y is an rvalue and again it is okay to..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom swap will use our custom swap operator skipping over the unnecessary construction and destruction of our class that std swap would.. dumb_array first dumb_array second nothrow enable ADL not necessary in our case but good practice using std swap by swapping the.. along side a free function swap etc. But this is all unnecessary any proper use of swap will be through an unqualified call and..
When should static_cast, dynamic_cast and reinterpret_cast be used? http://stackoverflow.com/questions/332030/when-should-static-cast-dynamic-cast-and-reinterpret-cast-be-used ones . In many cases explicitly stating static_cast isn't necessary but it's important to note that the T something syntax is equivalent.. can also cast through inheritance hierarchies. It is unnecessary when casting upwards towards a base class but when casting downwards..
What are Aggregates and PODs and how/why are they special? http://stackoverflow.com/questions/4178175/what-are-aggregates-and-pods-and-how-why-are-they-special a compile time error. If there are more initializers than necessary we get a compile time error as well. struct X int i1 int i2..
Thou shalt not inherit from std::vector http://stackoverflow.com/questions/4353203/thou-shalt-not-inherit-from-stdvector do that. I would suggest doing that only if it is really necessary. Only if you can't do that with free functions e.g. should keep..
http://stackoverflow.com/questions/4421706/operator-overloading operator manually setting the stream 䏭 state is only necessary when the reading itself succeeded but the result is not what..
http://stackoverflow.com/questions/4810664/how-do-i-use-arrays-in-c element of an array then array to pointer decay is not necessary because the pointer on which i is going to be added already..
Pretty-print C++ STL containers http://stackoverflow.com/questions/4850473/pretty-print-c-stl-containers trait ish that can figure out if something has the necessary iterator Many thanks Update and solution After raising this.. if not needed speeding up compilation time. These aren't necessary if you do actually include the headers. template typename T..
What does T&& (double ampersand) mean in C++11? http://stackoverflow.com/questions/5481539/what-does-t-double-ampersand-mean-in-c11 constructor was passed a temporary the copy would be unnecessary because we know the temporary will just be destroyed why not.. the object being constructed thereby eliminating the unnecessary copy. The move constructor would be used for temporaries and.. parameter but each additional parameter would multiply the necessary overload set by 2. That's very quickly unmaintainable. rvalue..
Where and why do I have to put the “template” and “typename” keywords? http://stackoverflow.com/questions/610245/where-and-why-do-i-have-to-put-the-template-and-typename-keywords templates. In general whenever a name is encountered it is necessary to determine whether that name denotes one of these entities.. There are many dependent names for which typename is not necessary because the compiler can with the applicable name lookup in..
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