c++ Programming Glossary: unions

Detecting endianness programmatically in a C++ program

http://stackoverflow.com/questions/1001307/detecting-endianness-programmatically-in-a-c-program

often be warned against by compiler. That's exactly what unions are for int is_big_endian void union uint32_t i char c 4 bint..

Accessing inactive union member - undefined?

http://stackoverflow.com/questions/11373203/accessing-inactive-union-member-undefined

undefined behavior c undefined behavior language lawyer unions share improve this question The confusion is that C explicitly.. at any time. C later has language permitting the use of unions containing struct s with common initial sequences this doesn't..

C++ union in C#

http://stackoverflow.com/questions/126781/c-union-in-c-sharp

Foo float bar union int killroy float fubar as c# c unions share improve this question You can use explicit field layouts..

Unnamed/anonymous namespaces vs. static functions

http://stackoverflow.com/questions/154469/unnamed-anonymous-namespaces-vs-static-functions

only applies to names of objects functions and anonymous unions not to type declarations. Edit The decision to deprecate this..

Purpose of Unions in C and C++

http://stackoverflow.com/questions/2310483/purpose-of-unions-in-c-and-c

of Unions in C and C I have used unions earlier comfortably today I was alarmed when I read this post.. undefined behaviour. If this isn't the intended usage of unions what is Can some one please explain it elaborately Update I.. Extract from Stroustrup's TC PL emphasis mine Use of unions can be essential for compatness of data ... sometimes misused..

What are Aggregates and PODs and how/why are they special?

http://stackoverflow.com/questions/4178175/what-are-aggregates-and-pods-and-how-why-are-they-special

aggregate if&hellip wait nothing is said about structs or unions can't they be aggregates Yes they can. In C the term class refers.. can. In C the term class refers to all classes structs and unions. So a class or struct or union is an aggregate if and only if.. is not initialized at all because it is static. Aggregate unions are different in that you may initialize only their first member..

Accessing inactive union member - undefined?

http://stackoverflow.com/questions/11373203/accessing-inactive-union-member-undefined

be a trap representation. The situation with C c 11 9.5 Unions class.union In a union at most one of the non static data members..

Purpose of Unions in C and C++

http://stackoverflow.com/questions/2310483/purpose-of-unions-in-c-and-c

of Unions in C and C I have used unions earlier comfortably today I was..

Initializing a union with a non-trivial constructor

http://stackoverflow.com/questions/321351/initializing-a-union-with-a-non-trivial-constructor

each such class has a trivial constructor From C 03 9.5 Unions pg 162 A union can have member functions including constructors..

What is the C++ equivalent of java.lang.Object x = new Foo()?

http://stackoverflow.com/questions/4233123/what-is-the-c-equivalent-of-java-lang-object-x-new-foo

be returned from a function are very different. 2. C style Unions If you want to restrict yourself to N types which are supported.. the same memory space as long as they are POD datatypes . Unions lack two very important things the ability to know which value..

C/C++: When would anyone use a union? Is it basically a remnant from the C only days?

http://stackoverflow.com/questions/4788965/c-c-when-would-anyone-use-a-union-is-it-basically-a-remnant-from-the-c-only

me Thanks R c c unions share improve this question Unions are usually used with the company of a discriminator a variable..

What are Unrestricted Unions proposed in C++11?

http://stackoverflow.com/questions/5548636/what-are-unrestricted-unions-proposed-in-c11

are Unrestricted Unions proposed in C 11 I gather unrestricted unions as one of the..

Is it a good practice to use unions in C++?

http://stackoverflow.com/questions/943267/is-it-a-good-practice-to-use-unions-in-c

solution in this case. c share improve this question Unions can be fine as long as you use them carefully . They can be.. be better to use a simple struct with two members in it. Unions used to be vital in C. In C there are usually much nicer ways..