I'm having trouble deciding whether not this code should compile or if just both compilers I tried have a bug (GCC 4.2 and Sun Studio 12). In general, if you have a static class member you declare in a header file you are required to define it in some source file. However, an exception is made in the standard for static const integrals. ...
I am refreshing myself on OOP with PHP and I saw an example of setting functions and/or variables as static. When and why would I set a variable/function to static? I've done other languages and don't really recall ever using static, I never found a real purpose to it. I know what it does but why not just use a variable instead? ...
How do I create a thread routine of a static member function class Blah { static void WINAPI Start(); }; // .. // ... // .... hThread = (HANDLE)_beginthreadex(NULL, 0, CBlah::Start, NULL, NULL, NULL); This gives me the following error: ***error C2664: '_beginthreadex' : cannot convert parameter 3 from 'void (void)' to 'unsigne...
I have been writing code without realizing WHY I can access constant values within static methods. Why is it possible to access const values without declaring it as static? E.g.) It's legal to call IMAGE_FILE_EXTENSION within AddImageToDocument(...) public abstract class ImageDocumentReplacer : DocumentReplacer { private const ...
Hi, I've been noticing static classes getting a lot of bad rep on SO in regards to being used to store global information. (And global variables being scorned upon in general) I'd just like to know what a good alternative is for my example below... I'm developing a WPF app, and many views of the data retrieved from my db are filtered b...
Hi, How can I get PHP to evaluate a static variable in double quotes? I want to do something like this: log("self::$CLASS $METHOD entering"); I've tried all sorts of {} combos to get the variable value of self::$CLASS, but nothing has worked. I've currently settled with string concatenation but it is a pain to type: log(self::$CLA...
In the example code void foo() { static Bar b; ... } compiled with GCC is it guaranteed that b will be created and initialized in a thread-safe manner ? In gcc's man page, found the -fno-threadsafe-statics command line option: Do not emit the extra code to use the routines specified in the C++ ABI for thread-safe initiali...
Hi, How can I serve some static content in liferay? I have a directory structure with htmls, css, etc and I would like to serve it with an address like http://localhost:8080/myStaticContent/index.html and so on. I don't want to use a front-end http server like apache. ...
Hi, I'm working on some C++ code and I've run into a question which has been nagging me for a while... Assuming I'm compiling with GCC on a Linux host for an ELF target, where are global static constructors and destructors called? I've heard there's a function _init in crtbegin.o, and a function _fini in crtend.o. Are these called by c...
The syntax maybe wrong public static class Storage { public static string filePath { get; set; } } And public class Storage { private void Storage () {}; public static string filePath { get; set; } } I got this from an example on the internet. what is the use of the second o...
Can an object of ifstream type used for file reading be a static member of a class? I want to read a file and store each line in an array of objects of a class i have created. I want the file reading object to belong to the entire array of objects instead of one single instance of the class. ...
Hi Guys, I have this: one string variable which holds the class name ($classname) one string variable with holds the property name ($propertyname) I want to get that property from that class, the problem is, the property is static and I don't know how to do that. If the property weren't static, it would have been: $classname->$pro...
In a project I have 2 classes: // mainw.h #include "IFr.h" ... class mainw { public: static IFr ifr; static CSize=100; ... }; // IFr.h #include "mainw.h" ... class IFr { public float[mainw::CSize]; }; But I cannot compile this code, getting an error at the static IFr ifr; line. Is this kind of cross-inclusion prohibited? ...
Hello, I'm currently working on implementing Lua into one of the applications that I'm working on. Currently I'm just using the C api and registering functions using lua_register, but I'd like to be able to pass static and non static function pointers to certain class methods. I've found certain libraries on the net, but since I need...
Hi all, thanks for checking my problem:) I'm not able to initialize a static native pointer inside a managed class. Here's the detail: I created a C++/CLI console project and declared a static unmanaged pointer inside. However I can't initialize the static pointer with any means (but if I put the pointer into an anonymous namespace, th...
Hi what could be the usage of static and extern pointer ?? if they exist ...
Hi All, I wanted a help in executing a static method asynchronously as well as in it's own process so that even if the client application that kicked-off this execution is closed, the method will continue it's execution. One option to do this is create a console application and execute this console application as a new process. However...
Using GCC4 in MAC OSX, Linux and Windows. Thanks. ...
Hi I have a static class which calls a static Logger class, e.g static class DoesStuffStatic { public static void DoStuff() { try { //something } catch(Exception e) { //do stuff; Logger.Log(e); } } } static class Logger { public static void Log(Exception e) { //do stuff here ...
Why should we use static variables or static calls to static methods in PHP5? Maybe to improve performance? ...