Copy initialization. Direct initialization. Aggregate initialization. Constant initialization. Reference initialization. Value categories. Order of evaluation. Operator precedence. Alternative representations. Boolean - Integer - Floating-point. Implicit conversions - Explicit conversions. Class declaration. Access specifiers. Virtual function. Default constructor. Copy constructor. Copy assignment. Class template.
Function template. Template specialization. Contents 1 Syntax 2 Explanation 2. Cannot appear on the extension-namespace-definition if the original-namespace-definition did not use inline. Inline namespaces An inline namespace is a namespace that uses the optional keyword inline in its original-namespace-definition.
A using-directive that names the inline namespace is implicitly inserted in the enclosing namespace similar to the implicit using-directive for the unnamed namespace In argument-dependent lookup , when a namespace is added to the set of associated namespaces, its inline namespaces are added as well, and if an inline namespace is added to the list of associated namespaces, its enclosing namespace is added as well.
Each member of an inline namespace can be partially specialized, explicitly instantiated, or explicitly specialized as if it were a member of the enclosing namespace. A namespace can be defined in several parts and so a namespace is made up of the sum of its separately defined parts. The separate parts of a namespace can be spread over multiple files. So, if one part of the namespace requires a name defined in another file, that name must still be declared.
Previous Page. Next Page. Tim Cooper k 36 36 gold badges silver badges bronze badges. Steven Hammons Steven Hammons 1, 8 8 gold badges 22 22 silver badges 32 32 bronze badges. The for general case of using namespace XXX; , see the answers below. For the specific case of using namespace std; , I recommend that you never do that. Importing the entire std namespace can cause too many problems. Add a comment. Active Oldest Votes. Namespace is used to prevent name conflicts. Improve this answer.
Myles Myles That's what I remember for now. Tamer Shlash Tamer Shlash 8, 4 4 gold badges 42 42 silver badges 78 78 bronze badges. Afzaal Ahmad Zeeshan 15k 11 11 gold badges 52 52 silver badges 96 96 bronze badges. Papal Papal 21 3 3 bronze badges. For example, I can create a. I created a much more detailed tutorial on the links provided which show how it works with linked lists. Hopefully this helps someone!
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Active 2 years, 2 months ago. Viewed 83k times. Improve this question. Zero Piraeus Pulkit Sinha Pulkit Sinha 2, 4 4 gold badges 17 17 silver badges 20 20 bronze badges. I can of course, but I'd still like to know — Pulkit Sinha. An unnecessary distinctive syntax: All other languages with namespaces just use '. Which meant that programmers overused using directives to import namespaces into global scope. Chris Becke: I like distinctive syntax.
I like to know whether I'm looking at a class in a name space or a member in a class. If other languages can do it, why not introduce them to C? Show 3 more comments. Active Oldest Votes. There is some additional maintenance involved but I feel that it is minimal. Improve this answer.
Joshua Schlichting 2, 3 3 gold badges 24 24 silver badges 43 43 bronze badges. This is so awesome. One thing I might add, I'm trying out making all of my functions in my. That's a great idea, but how do you deal with constants and enums? Unless you compile such libraries along with your own source, this approach will add some overhead to its function calls. AlexReinking: Well, that's nice, but we would never get these functions inlined.
And - necro'ing is great, no apology necessary. Mads Elvheim Mads Elvheim. There are actually more than two name spaces.
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