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c++ Programming Glossary: turnshttp://stackoverflow.com/questions/10639053/name-lookups-in-c-templates are checking before knowing T . The trick of adding this turns next into a dependent name and that in turn means that lookup..
When should your destructor be virtual? [duplicate] http://stackoverflow.com/questions/1123044/when-should-your-destructor-be-virtual ~A not what you wanted you wanted ~B having ~A virtual turns on polymorphism virtual ~A So when you now call delete thing..
Is any part of C++ syntax context sensitive? [duplicate] http://stackoverflow.com/questions/1172939/is-any-part-of-c-syntax-context-sensitive a b c declares a function named b that takes a c and returns an a . If you look up the definition of context free languages.. free Type 2 grammar &alpha and &beta must be empty. It turns out that you can also restrict grammars with the monotonic restriction..
How to put two increment statements in a C++ 'for' loop? http://stackoverflow.com/questions/1232176/how-to-put-two-increment-statements-in-a-c-for-loop use the comma operator which evaluates both operands and returns the second operand. Thus for int i 0 i 5 i j do_something i.. it wasn't behaving as a comma operator at all but as it turns out this is simply a precedence issue the comma operator has..
Is it possible to std::move objects out of functions? (C++11) http://stackoverflow.com/questions/13618506/is-it-possible-to-stdmove-objects-out-of-functions-c11 is a local nonstatic object X foo X x return x ERROR returns reference to nonexistent object An rvalue reference is a reference..
Is C++ context-free or context-sensitive? http://stackoverflow.com/questions/14589346/is-c-context-free-or-context-sensitive a b c declares a function named b that takes a c and returns an a . If you look up the definition of context free languages.. free Type 2 grammar &alpha and &beta must be empty. It turns out that you can also restrict grammars with the monotonic restriction..
Setting the internal buffer used by a standard stream (pubsetbuf) http://stackoverflow.com/questions/1494182/setting-the-internal-buffer-used-by-a-standard-stream-pubsetbuf I looked at the implementation of pubsetbuf and it turns out that it literally does nothing . virtual _Myt __CLR_OR_THIS_CALL..
Using strtok with a std::string http://stackoverflow.com/questions/289347/using-strtok-with-a-stdstring I tried token strtok str.c_str which fails because it turns it into a const char not a char c strtok share improve this..
http://stackoverflow.com/questions/2958648/what-are-the-pitfalls-of-adl will call print to print the object n times. Actually it turns out that if we only look at this code we have absolutely no..
What do 'statically linked' and 'dynamically linked' mean? http://stackoverflow.com/questions/311882/what-do-statically-linked-and-dynamically-linked-mean code what you run . The first is compilation which turns source code into object modules. The second linking is what..
Can anyone quantify performance differences between C++ and Java? http://stackoverflow.com/questions/313446/can-anyone-quantify-performance-differences-between-c-and-java i.e. the actual type is always the same in practice . It turns out that up to 95 of all virtual method calls are monomorphic..
How do you declare an interface in C++? http://stackoverflow.com/questions/318064/how-do-you-declare-an-interface-in-c don't have to include a body for the virtual destructor it turns out some compilers have trouble optimizing an empty destructor..
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 most dangerous cast and should be used very sparingly. It turns one type directly into another such as casting the value from..
Can someone explain this template code that gives me the size of an array? http://stackoverflow.com/questions/437150/can-someone-explain-this-template-code-that-gives-me-the-size-of-an-array a There's a variation i made up some time ago Edit turns out someone already had that same idea here which can determine..
#include all .cpp files into a single compilation unit? http://stackoverflow.com/questions/543697/include-all-cpp-files-into-a-single-compilation-unit All' and 'Debug All' which I had never seen before. It turns out the author of the projects has a single ALL.cpp which #includes..
Can a local variable's memory be accessed outside its scope? http://stackoverflow.com/questions/6441218/can-a-local-variables-memory-be-accessed-outside-its-scope is perfectly legal for the compiler to generate code that turns back to zero everything in the room that you just vacated. It.. http blogs.msdn.com b ericlippert archive 2011 06 23 ref returns and ref locals.aspx Why do we use stacks to manage memory Are..
Choice between vector::resize() and vector::reserve() http://stackoverflow.com/questions/7397768/choice-between-vectorresize-and-vectorreserve have initial estimate than reserve that estimate and if it turns out to be not enough just let the vector do it's thing. share..
How can I see the Assembly code for a C++ Program? http://stackoverflow.com/questions/840321/how-can-i-see-the-assembly-code-for-a-c-program Wa asks compiler driver to pass options to assembler al turns on assembly listing and ah adds high level source listing g..
How does std::forward work? [duplicate] http://stackoverflow.com/questions/8526598/how-does-stdforward-work does according to the standard §20.2.3 forward p2 Returns static_cast T t Where T is the explicitly specified template.. 'v' to 'U ' giving 'static_cast int v ' this just turns 'v' back into an rvalue named rvalue references 'v' in this..
Calling virtual functions inside constructors http://stackoverflow.com/questions/962132/calling-virtual-functions-inside-constructors B b int n b.getn One might expect that n is set to 2. It turns out that n is set to 1. Why c constructor overriding virtual..
msvcr90d.dll not found in debug mode http://stackoverflow.com/questions/1150464/msvcr90d-dll-not-found-in-debug-mode is meant to install a debug runtime but it wasn't there. Turns out the original release of VS2008 doesn't install a 64 bit..
C++0X Concepts are gone. Which other features should go too? http://stackoverflow.com/questions/1155389/c0x-concepts-are-gone-which-other-features-should-go-too in the process for making serious changes to the spec. Turns out it wasn't and the committee was willing to take dramatic..
C99 stdint.h header and MS Visual Studio http://stackoverflow.com/questions/126279/c99-stdint-h-header-and-ms-visual-studio c c visual studio c99 share improve this question Turns out you can download a MS version of this header from http msinttypes.googlecode.com..
How do I invoke a non-default constructor for each inherited type from a type list? http://stackoverflow.com/questions/1671297/how-do-i-invoke-a-non-default-constructor-for-each-inherited-type-from-a-type-li to see how it could be done with inherit_linearly . Turns out to be not that bad IMHO template class Base class Self struct..
Detect GCC compile-time flags of a binary http://stackoverflow.com/questions/189350/detect-gcc-compile-time-flags-of-a-binary number of compiler versions after all . Added much later Turns out GCC has this feature in 4.3 if asked for when you compile..
Are memory leaks “undefined behavior” class problem in C++? http://stackoverflow.com/questions/1978709/are-memory-leaks-undefined-behavior-class-problem-in-c leaks &ldquo undefined behavior&rdquo class problem in C Turns out many innocently looking things are undefined behavior in..
http://stackoverflow.com/questions/2035890/unit-testing-concurrent-code the primitives of said code couldn't be that hard could it Turns out it is that hard. At least for me it is. So how would you..
Read whole ASCII file into C++ std::string http://stackoverflow.com/questions/2602013/read-whole-ascii-file-into-c-stdstring io standard library share improve this question Update Turns out that this method while following STL idioms well is actually..
Easy framework for OpenGL Shaders in C/C++ http://stackoverflow.com/questions/2795044/easy-framework-for-opengl-shaders-in-c-c C I just wanted to try out some shaders on a flat image. Turns out that writing a C program which just takes a picture as a.. system one has to use GLUT which is another framework.. Turns out that Nvidia's Fx composer is nice to play with shaders....
enable_shared_from_this - empty internal weak pointer? http://stackoverflow.com/questions/4494786/enable-shared-from-this-empty-internal-weak-pointer 's constructor not initializer list I get an exception. Turns out that the internal weak pointer is null and doesn't point..
How do you create a static template member function that performs actions on a template class? http://stackoverflow.com/questions/488959/how-do-you-create-a-static-template-member-function-that-performs-actions-on-a-t compareIter compareIter vectorToUpdate.erase compareIter Turns out that if I specify std vector in the signature the iterators..
http://stackoverflow.com/questions/7095556/how-to-handle-evolving-c-std-namespace-e-g-stdtr1shared-ptr-vs-std tr1 implementation and so I switched to boost shared_ptr. Turns out there is also a boost tr1 shared_ptr. Now that the code..
How to add qi::symbols in grammar<Iterator,double()>? http://stackoverflow.com/questions/8780604/how-to-add-qisymbols-in-grammariterator-double and the absence of a SSCCE had me blindsided for a moment. Turns out I should just have ignored the circumstantial 'evidence'..
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