c++ Programming Glossary: suchWhat is a smart pointer and when should I use one? http://stackoverflow.com/questions/106508/what-is-a-smart-pointer-and-when-should-i-use-one use involves the scope of the smart pointer wrapper object such as implemented by boost scoped_ptr or std unique_ptr . void..
Why is processing a sorted array faster than an unsorted array? http://stackoverflow.com/questions/11227809/why-is-processing-a-sorted-array-faster-than-an-unsorted-array is to avoid data dependent branching in critical loops. such as in this example Update GCC 4.6.1 with O3 or ftree vectorize..
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 to entities not defined in the current translation. All such translator output is collected into a program image which contains..
How to pass objects to functions in C++? http://stackoverflow.com/questions/2139224/how-to-pass-objects-to-functions-in-c and non reference values I remember in Java there are no such issues since we pass just the variable that holds reference.. except when they are to be changed inside the function and such changes should be reflected outside in which case you pass by.. by copy they are to be changed inside the function and such changes should not be reflected outside in which case you can..
http://stackoverflow.com/questions/3106110/what-is-move-semantics meant the exact same object every time We call expressions such as x lvalues . The arguments in lines 2 and 3 are not lvalues..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom on self assignment and it protects us from subtle bugs such as deleting the array only to try and copy it . But in all other..
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 It does things like implicit conversions between types such as int to float or pointer to void and it can also call explicit.. instance. It can also be used to add const to an object such as to call a member function overload. const_cast also works.. or private inheritance. This is rarely an issue however as such forms of inheritance are rare. reinterpret_cast is the most..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three Let us go back in time to pre standard C . There was no such thing as std string and programmers were in love with pointers... resources Some resources cannot or should not be copied such as file handles or mutexes. In that case simply declare the.. to manage a resource yourself because an existing class such as std string already does it for you. Just compare the simple..
Undefined Behavior and Sequence Points http://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points Undefined Behaviour in Section 禮1.3.12 as behaviour such as might arise upon use of an erroneous program construct or..
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 members of type non POD struct non POD union or array of such types or reference and has no user defined copy assignment operator.. members of type non POD struct non POD union or array of such types or reference and has no user defined copy assignment operator.. class POD classes POD unions scalar types and arrays of such types are collectively called POD types. POD's are special in..
What are the differences between pointer variable and reference variable in C++? http://stackoverflow.com/questions/57483/what-are-the-differences-between-pointer-variable-and-reference-variable-in-c implements references as pointers. That is a declaration such as int ri i allocates the same amount of storage as a pointer..
Will an 'empty' destructor do the same thing as the generated destructor? http://stackoverflow.com/questions/1025313/will-an-empty-destructor-do-the-same-thing-as-the-generated-destructor on such an object that has a user declared destructor. Such types are not PODs anymore plain old data and these are not..
“listening” to file changes in C/C++ (on Windows) http://stackoverflow.com/questions/1083372/listening-to-file-changes-in-c-c-on-windows and be able to receive all changes that are made to it Such as a file called Names.txt. Could I watch that file for names..
Set all bytes of int to (unsigned char)0, guaranteed to represent zero? http://stackoverflow.com/questions/11138188/set-all-bytes-of-int-to-unsigned-char0-guaranteed-to-represent-zero as a null character independent of shift state. Such a byte shall not occur as part of any other multibyte character...
How to hide a string in binary code? http://stackoverflow.com/questions/1356896/how-to-hide-a-string-in-binary-code key from executable file. What I mean when I say hide Such code const char encryptionKey My strong encryption key Using..
Downloading and integrating Qt5 with Visual Studio 2012 http://stackoverflow.com/questions/15826893/downloading-and-integrating-qt5-with-visual-studio-2012 your PATH for example due to a git or msys installation . Such an error is indicated by qt5 srcqtbasebinqmake.exe command not..
What is useful about a reference-to-array parameter? http://stackoverflow.com/questions/2188991/what-is-useful-about-a-reference-to-array-parameter when it comes to generic library level functions. Such functions are more versatile. That means that often there's..
What are the rules about using an underscore in a C++ identifier? http://stackoverflow.com/questions/228783/what-are-the-rules-about-using-an-underscore-in-a-c-identifier for use as a name in the global namespace. 165 165 Such names are also reserved in namespace std 17.4.3.1 . Because..
Calling class method through NULL class pointer http://stackoverflow.com/questions/2505328/calling-class-method-through-null-class-pointer arg. UPDATE Thanks to Windows programmer for right comment Such code is alright only for CPU which executes it. There is absolutely..
How to get available memory C++/g++? http://stackoverflow.com/questions/2513505/how-to-get-available-memory-c-g want to allocate my buffers according to memory available. Such that when I do processing and memory usage goes up but still..
What is a non-trivial constructor in C++? http://stackoverflow.com/questions/3899223/what-is-a-non-trivial-constructor-in-c that point to other parts of the very same object. Such a self referential object cannot be copied by a simple raw memory..
http://stackoverflow.com/questions/4340396/does-the-c-standard-mandate-poor-performance-for-iostreams-or-am-i-just-deali of IOStreams namely its memory safe and type safe design. Such benefits come at a price and you've written a test which makes..
Another bug in g++/Clang? [C++ Templates are fun] http://stackoverflow.com/questions/4420828/another-bug-in-g-clang-c-templates-are-fun is instead considered to name the constructor of class C. Such a constructor name shall be used only in the declarator id of..
What is assignment via curly braces called? and can it be controlled? http://stackoverflow.com/questions/5666321/what-is-assignment-via-curly-braces-called-and-can-it-be-controlled question That is not assignment. That is initialization. Such initialization is allowed for aggregate only that includes POD..
http://stackoverflow.com/questions/6032638/default-variable-value for variable i will be different on different compilers. Such local uninitialized variables SHOULD NEVER be used. In fact..
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 function calls might end up calling different functions. Such constructs are generally said to depend on template parameters...
What breaking changes are introduced in C++11? http://stackoverflow.com/questions/6399615/what-breaking-changes-are-introduced-in-c11 struct B A int main sizeof B valid in C 03 invalid in C 0x Such sizeof tricks have been used by some SFINAE and needs to be..
Why comparing double and float leads to unexpected result? [duplicate] http://stackoverflow.com/questions/6722293/why-comparing-double-and-float-leads-to-unexpected-result memory which results in a number that is not exactly 0.1 . Such an scenario is called a Rounding error . Whenever comparing..
initializer_list and move semantics http://stackoverflow.com/questions/8193102/initializer-list-and-move-semantics in your code is T const an immutable rvalue reference. Such an expression can't meaningfully be moved from. It will bind..
Can SFINAE detect private access violations? http://stackoverflow.com/questions/8984013/can-sfinae-detect-private-access-violations the generation of implicitly defined functions etc. Such side effects are not in the 𦤹mmediate context and can result..
http://stackoverflow.com/questions/9936011/if-a-function-returns-no-value-with-a-valid-return-type-is-it-okay-to-for-the called before it could legitimately reject the program. Such analysis requires inspection of the entire program which is..
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