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Undefined reference to static constexpr char[]
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C++17 introduces inline variables
C++17 fixes this problem for constexpr static member variables requiring an out-of-line definition if it was odr-used. See the second half of this answer for pre-C++17 details.
Proposal P03...
When should I really use noexcept?
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@Pubby C++ exception handling is usually done with no overhead except jump tables which map potentially throwing call site addresses to handler entry points. Removing those tables is as close as it gets to removing exception handlin...
static constructors in C++? I need to initialize private static objects
...public:
StaticStuff()
{
for (char c = 'a'; c <= 'z'; c++)
letters_.push_back(c);
}
// provide some way to get at letters_
};
class Elsewhere
{
static StaticStuff staticStuff; // constructor runs once, single instance
};
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Why do objects of the same class have access to each other's private data?
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Because that's how it works in C++. In C++ access control works on per-class basis, not on per-object basis.
Access control in C++ is implemented as a static, compile-time feature. I think it is rather obvious that it is not really possible to implement a...
What's the best way to put a c-struct in an NSArray?
...w collection type =) std::vector (for example) is more suited to holding C/C++ types, structs and classes than NSArray. By using an NSArray of NSValue, NSData, or NSDictionary types, you're losing a lot of type-safety while adding a ton of allocations and runtime overhead. If you want to stick with ...
How to throw a C++ exception
...wered, I just want to add a note on how to do proper exception handling in C++11:
Use std::nested_exception and std::throw_with_nested
It is described on StackOverflow here and here, how you can get a backtrace on your exceptions inside your code without need for a debugger or cumbersome logging, ...
How to initialize private static members in C++?
What is the best way to initialize a private, static data member in C++? I tried this in my header file, but it gives me weird linker errors:
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system(“pause”); - Why is it wrong?
...endence, it sure seems strange to suggest _getch, especially when standard C++ provides getchar.
– paxdiablo
Oct 19 '12 at 7:14
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What is a typedef enum in Objective-C?
...clares an enumeration with the tag tagname. In C and Objective-C (but not C++), any references to this must be preceded with the enum keyword. For example:
enum tagname x; // declare x of type 'enum tagname'
tagname x; // ERROR in C/Objective-C, OK in C++
In order to avoid having to use the e...
How to call C from Swift?
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is it compatible with C++, .cpp files??
– Carlos.V
Nov 12 '16 at 3:29
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