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c++ Programming Glossary: namedWhat are copy elision and return value optimization? http://stackoverflow.com/questions/12953127/what-are-copy-elision-and-return-value-optimization return value optimization What is copy elision What is named return value optimization What do they imply In what situations..
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 as with the static keyword is to put function f in an unnamed namespace . Per Paragraph 3.5 4 of the C 11 Standard An unnamed.. namespace . Per Paragraph 3.5 4 of the C 11 Standard An unnamed namespace or a namespace declared directly or indirectly within.. or a namespace declared directly or indirectly within an unnamed namespace has internal linkage. All other namespaces have external..
Is there a simple script to convert C++ enum to string? http://stackoverflow.com/questions/201593/is-there-a-simple-script-to-convert-c-enum-to-string script to convert C enum to string Suppose we have some named enums enum MyEnum FOO BAR 0x50 What I googled for is a script.. ENUM The gotcha is really with typedefed enums and unnamed C style enums. Does anybody know something for this EDIT The..
What is the difference between #include <filename> and #include “filename”? http://stackoverflow.com/questions/21593/what-is-the-difference-between-include-filename-and-include-filename by the specified sequence between the delimiters. The named source file is searched for in an implementation defined manner...
How to use Boost in Visual Studio 2010 http://stackoverflow.com/questions/2629421/how-to-use-boost-in-visual-studio-2010 boost is. Run bootstrap.bat to build b2.exe previously named bjam . Run b2 Win32 b2 toolset msvc 10.0 build type complete..
What does int argc, char *argv[] mean? http://stackoverflow.com/questions/3024197/what-does-int-argc-char-argv-mean the name of the program to the array. The variables are named argc argument count and argv argument vector by convention but..
http://stackoverflow.com/questions/3582001/advantages-of-using-forward In perfect forwarding std forward is used to convert the named rvalue references t1 and t2 to unnamed rvalue references. What.. used to convert the named rvalue references t1 and t2 to unnamed rvalue references. What is the purpose of doing that How would..
RAII and smart pointers in C++ http://stackoverflow.com/questions/395123/raii-and-smart-pointers-in-c tends to be inexpensive. Secondly due to what's known as named return value optimisation returning by value may not be expensive..
What is the proper declaration of main? http://stackoverflow.com/questions/4207134/what-is-the-proper-declaration-of-main of a class nor can it be placed in a namespace even the unnamed namespace . The name main is not reserved in C except as a function.. global namespace. You are free to declare other entities named main including among other things classes variables enumerations.. not in the global namespace. You can declare a function named main as a member function or in a namespace but such a function..
Why is the type of the main function in C and c++ left to the user to define? http://stackoverflow.com/questions/5296163/why-is-the-type-of-the-main-function-in-c-and-c-left-to-the-user-to-define Program startup The function called at program startup is named main. The implementation declares no prototype for this function...
Do the parentheses after the type name make a difference with new? http://stackoverflow.com/questions/620137/do-the-parentheses-after-the-type-name-make-a-difference-with-new doing B obj default initalized B obj declares a function named obj returning an object of type B would be illegal . Hence in..
Create WCF service for unmanaged C++ clients http://stackoverflow.com/questions/686452/create-wcf-service-for-unmanaged-c-clients NT Service will host the WCF Service. Add a WCF Service named HelloService to the project. To do this right click the project..
OpenCV 2.3 C++ Visual Studio 2010 http://stackoverflow.com/questions/7011238/opencv-2-3-c-visual-studio-2010 and execute it to extract all files to a folder named OpenCV2.3 . Inside this folder there are 2 directories build..
Why doesn't Java offer operator overloading? [closed] http://stackoverflow.com/questions/77718/why-doesnt-java-offer-operator-overloading types not value types. So for a user defined type named 'Complex' assignment means to copy a reference to an existing..
Why does the use of 'new' cause memory leaks? http://stackoverflow.com/questions/8839943/why-does-the-use-of-new-cause-memory-leaks called std unique_ptr . There's also an old one pre C 11 named auto_ptr but it's now deprecated because it has a strange copying..
What is the difference between char a[] = “string”; and char *p = “string”; http://stackoverflow.com/questions/9460260/what-is-the-difference-between-char-a-string-and-char-p-string to be known by the name a . That is there is a location named a at which six characters can sit. The pointer declaration char..
Understanding return value optimization and returning temporaries - C++ http://stackoverflow.com/questions/1394229/understanding-return-value-optimization-and-returning-temporaries-c compilers supports it. The last case is so called NRVO Named RVO . That's relatively new feature of C . Standard allows but..
C++ “Named Parameter Idiom” vs. Boost::Parameter library http://stackoverflow.com/questions/203667/c-named-parameter-idiom-vs-boostparameter-library &ldquo Named Parameter Idiom&rdquo vs. Boost Parameter library I've looked.. vs. Boost Parameter library I've looked at both the Named Parameter Idiom and the Boost Parameter library . What advantages.. parameter share improve this question Implementing the Named Parameter Idiom is really easy almost about as easy as using..
fastest (low latency) method for Inter Process Communication between Java and C/C++ http://stackoverflow.com/questions/2635272/fastest-low-latency-method-for-inter-process-communication-between-java-and-c specific CPU cores with taskset TCP 25 microseconds Named pipes 15 microseconds Now explicitly specifying core masks like.. microseconds TCP explicit different cores 22 microseconds Named pipes same core 4 5 microseconds Named pipes taskset different.. 22 microseconds Named pipes same core 4 5 microseconds Named pipes taskset different cores 7 8 microseconds so TCP overhead..
Efficient data transfer from Java to C++ on windows http://stackoverflow.com/questions/266913/efficient-data-transfer-from-java-to-c-on-windows It seems like a safer solution may be to use JNI and the Named Pipe API . pipe blah making a god awful platform specific mess..
avoiding the tedium of optional parameters http://stackoverflow.com/questions/2700940/avoiding-the-tedium-of-optional-parameters improve this question You might be interested in the Named Parameter Idiom . To summarize create a class that holds the..
What is the proper way to return an object from a C++ function? http://stackoverflow.com/questions/3953637/what-is-the-proper-way-to-return-an-object-from-a-c-function this question Modern compilers typically implement the Named Return Value Optimization by which the copy you reference and..
Why isn't the copy constructor called here? [duplicate] http://stackoverflow.com/questions/4286301/why-isnt-the-copy-constructor-called-here Base 5 int main Base b foo In the yet more generic NRVO Named return value optimization when processing the internal function..
private constructor [duplicate] http://stackoverflow.com/questions/4648602/private-constructor Instead you can create objects using something like the Named Constructor Idiom where you have static class functions that.. that can create and return instances of a class. The Named Constructor Idiom is for more intuitive usage of a class. The..
Returning *this in member functions http://stackoverflow.com/questions/4899756/returning-this-in-member-functions this question This is sometimes referred to as the Named Parameter Idiom or method chaining. This isn't bad practice..
any good and simple RPC library for inter-process calls? [closed] http://stackoverflow.com/questions/5398673/any-good-and-simple-rpc-library-for-inter-process-calls between machines. The same about DCOM CORBA et al. Named pipes Never used them any good library over WinAPI OpenMPI ..
What does T&& (double ampersand) mean in C++11? http://stackoverflow.com/questions/5481539/what-does-t-double-ampersand-mean-in-c11 be to a temporary that is the result of the conversion. Named rvalue references are lvalues. Unnamed rvalue references are..
http://stackoverflow.com/questions/6022423/mjpeg-streaming-and-decoding have a look at gst opencv UPDATE Option3 Using gstreamer Named Pipe and opencv On Linux one may get mjpeg stream and convert.. read the data from the named pipe in opencv Step 1. Create Named Pipe mkfifo stream_fifo Step 2. Create opencvvideo_test.c compile.. capture CV_CAP_PROP_FRAME_WIDTH display video cvNamedWindow video CV_WINDOW_AUTOSIZE while key 'q' double t1 double..
Is RVO (Return Value Optimization) applicable for all objects? http://stackoverflow.com/questions/7596183/is-rvo-return-value-optimization-applicable-for-all-objects always be applied what cannot be universally applied is Named Return Value Optimization. Basically for the optimization to..
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