c++ Programming Glossary: thingDo-While and if-else statements in C/C++ macros http://stackoverflow.com/questions/154136/do-while-and-if-else-statements-in-c-c-macros so that a semicolon after your macro always means the same thing. Let's say you had something like your second macro. #define.. macro always means the same thing. Let's say you had something like your second macro. #define BAR X f x g x Now if you were.. no longer associated with the if. It doesn't help to wrap things in curly braces within the macro because the following is also..
Unnamed/anonymous namespaces vs. static functions http://stackoverflow.com/questions/154469/unnamed-anonymous-namespaces-vs-static-functions the name of the namespace it's impossible to access anything within it from outside. But these unnamed namespaces are accessible.. Or are they essentially two ways of doing the exact same thing c namespaces share improve this question The C Standard.. back to being essentially two ways of doing the exact same thing. For more discussion please see this SO question. Unnamed namespaces..
What do the following phrases mean in C++: zero-, default- and value-initialization? http://stackoverflow.com/questions/1613341/what-do-the-following-phrases-mean-in-c-zero-default-and-value-initializat c initialization c faq share improve this question One thing to realize is that 'value initialization' is new with the C.. and when the different methods kick in are subtle. One thing to certainly be aware of is that MSVC follows the C 98 rules..
http://stackoverflow.com/questions/213907/c-stdendl-vs-n binary. The compiled program will write out the correct thing for the system compiled for. The only difference is that std..
When does invoking a member function on a null instance result in undefined behavior? http://stackoverflow.com/questions/2474018/when-does-invoking-a-member-function-on-a-null-instance-result-in-undefined-beha undefined as well but there's some dispute. The first thing to understand is why it's undefined behavior to dereference..
Read whole ASCII file into C++ std::string http://stackoverflow.com/questions/2602013/read-whole-ascii-file-into-c-stdstring stuff with buffer here ... Now I want to do the exact same thing but using a std string instead of a char . I want to avoid loops..
What is the copy-and-swap idiom? http://stackoverflow.com/questions/3279543/what-is-the-copy-and-swap-idiom elegantly assists the assignment operator in achieving two things avoiding code duplication and providing a strong exception.. In order to use the copy and swap idiom we need three things a working copy constructor a working destructor both are the.. For a strong exception guarantee it would need to be something akin to dumb_array operator const dumb_array other if this other..
http://stackoverflow.com/questions/402283/stdwstring-vs-stdstring wchar_t is supposed to hold a wide character and then things get tricky On Linux a wchar_t is 4 bytes while on Windows it's.. be ol矇 in a french localized Windows but would be something diff矇rent on an cyrillic localized Windows ol邿 if you use Windows.. least the mostly compatible UCS 2 which is almost the same thing IIRC . Applications using char are said multibyte because each..
How can I add reflection to a C++ application? http://stackoverflow.com/questions/41453/how-can-i-add-reflection-to-a-c-application type is derived from another particular type. This kind of thing is possible with C using template tricks . Use boost type_traits.. C using template tricks . Use boost type_traits for many things like checking whether a type is integral . For checking for.. all methods the class names base classes and everything it needs. C is made with speed in mind. If you want high level..
http://stackoverflow.com/questions/4172722/what-is-the-rule-of-three us go back in time to pre standard C . There was no such thing as std string and programmers were in love with pointers. The..
http://stackoverflow.com/questions/4421706/operator-overloading X lhs const X rhs return operator lhs rhs The important thing to note here is that only two of these operators actually do.. here is that only two of these operators actually do anything the others are just forwarding their arguments to either of.. to do the same for user defined types which could be something as innocently looking as a list iterator . Once you got used..
When to use virtual destructors? http://stackoverflow.com/questions/461203/when-to-use-virtual-destructors I have a solid understanding of most OO theory but the one thing that confuses me a lot is virtual destructors. I thought that..
What's this STL vs. “C++ Standard Library” fight all about? [closed] http://stackoverflow.com/questions/5205491/whats-this-stl-vs-c-standard-library-fight-all-about It gets put on CVs. And it is misleading. I hardly know anything about C 's history so I can't judge the article's correctness... Template Library and the Standard Library are not the same thing. The battle is about whether the current Standard Library should.. it may be entirely counter productive to attempt to change things even if it's supposed to be for the better. We may just be..
Difference between 'struct' and 'typedef struct' in C++? http://stackoverflow.com/questions/612328/difference-between-struct-and-typedef-struct-in-c plain Foo in the typedef namespace both refer to the same thing and you can freely declare objects of type Foo without the struct..
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 later a contract which you broke . In this situation anything can happen . The book can be there you got lucky. Someone else's.. you to break the rules of the system. If you try to do something illegal and foolish like going back into a room you're not authorized.. structure because a stack has the property that the first thing pushed on it is going to be the last thing popped off. It's..
Why does the use of 'new' cause memory leaks? http://stackoverflow.com/questions/8839943/why-does-the-use-of-new-cause-memory-leaks connections or whatever you fancy. This automatic_pointer thing already exists in various forms I've just provided it to give..
Why can't variables be declared in a switch statement? http://stackoverflow.com/questions/92396/why-cant-variables-be-declared-in-a-switch-statement and declaring them close to first use is obviously a good thing but the following still won't work switch val case VAL This.. one of scope. Your curly brackets define the scope as everything inside the 'switch' statement. This means that you are left..
Is gcc4.7 buggy about regular expressions? [duplicate] http://stackoverflow.com/questions/12530406/is-gcc4-7-buggy-about-regular-expressions that feedback really helped improve C 11. This was a Good Thing TM . The regex code was never in a useful state but was added..
Is std::unique_ptr<T> required to know the full definition of T? http://stackoverflow.com/questions/6012157/is-stdunique-ptrt-required-to-know-the-full-definition-of-t in a header that looks like this #include memory class Thing class MyClass std unique_ptr Thing my_thing If I include this.. #include memory class Thing class MyClass std unique_ptr Thing my_thing If I include this header in a cpp that does not include.. I include this header in a cpp that does not include the Thing type definition then this does not compile under VS2010 SP1..
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 of the following is taken from comments made to an Old New Thing article . Sometimes the memory returned by the new operator..
Dual emission of constructor symbols http://stackoverflow.com/questions/6921295/dual-emission-of-constructor-symbols two entries in libraries. I have a header thing.hpp class Thing Thing Thing int x void foo And thing.cpp #include thing.hpp.. in libraries. I have a header thing.hpp class Thing Thing Thing int x void foo And thing.cpp #include thing.hpp Thing.. in libraries. I have a header thing.hpp class Thing Thing Thing int x void foo And thing.cpp #include thing.hpp Thing Thing..
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