Hello I have a question Why do we need namespace to avoid

Well yes but actually no namespaces are usually used in Object oriented languages C++ is influenced by Ada and Smalltalk and got this features from these languages

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19.11.2020

Void Автор вопроса

Pavel
Namespaces are usually used for free functions tha...

Thanks you very much for you answer. Then, why do we have std namespace for example that it contains as far as i know - classes?

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19.11.2020

Void Автор вопроса

Kuran Kaname
https://del.dog/thycenangy.go

Thank you ❤️

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19.11.2020

Pavel

Void
Thanks you very much for you answer. Then, why do ...

You can think of it as of name prefixes (that not needed when you work inside the namespace). E.g. instead of std_string we have std::string. But std is not a class.

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19.11.2020

Void Автор вопроса

Pavel
You can think of it as of name prefixes (that not ...

std isn't a namespace?

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19.11.2020

Pavel

Void
std isn't a namespace?

Std is a namespace

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19.11.2020

Pavel

Void
std isn't a namespace?

I mean that it's no more than a namespace

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19.11.2020

Void Автор вопроса

Pavel
I mean that it's no more than a namespace

Is there a situations when we want to use namespace that contains classes (n maybe regular functions too)?

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19.11.2020

Pavel

Void
Is there a situations when we want to use namespac...

All kinds of situations. I start thinking that we're talking about different things, because namespaces usually contain functions or/and classes.

0

19.11.2020

Void Автор вопроса

Pavel
All kinds of situations. I start thinking that we'...

We are talking on same things. I'm just exploring all the options. thanks for your answers.

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19.11.2020

Sunbro

just for clarification what do you mean by stating "classes avoid name conflicts" ?

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19.11.2020

Void Автор вопроса

Sunbro
just for clarification what do you mean by stating...

void hello(){} void hello(){} That's problem. class Test { public ...void hello() } class Test1 { public ...void hello() } That's not a problem.

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20.11.2020

Sunbro

Void
void hello(){} void hello(){} That's problem. cla...

you should read again about oop and what classes are used for. because the situation you are describing will never occur as a problem. this situation as a problem can only occur in functional programming where you are using namespaces to avoid naming conflicts

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20.11.2020

Пользователь 61653

Void
void hello(){} void hello(){} That's problem. cla...

Why you need two free functions with same signature? Classes and name spaces are different things though.

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20.11.2020

Void Автор вопроса

Пользователь 61653
Why you need two free functions with same signatur...

It just an example, the question isn't if namespaces and classes are same.

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20.11.2020

Пользователь 61653

Void
It just an example, the question isn't if namespac...

Your example is wrong.

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20.11.2020

Void Автор вопроса

Пользователь 61653
Your example is wrong.

Maybe you got it incorrectly?

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20.11.2020

Pavel · Accepted Answer

Namespaces are usually used for free functions that are not bound to any specific class. You can replace a namespace with a class with public static functions and it will work, but this class then can be instantiated which is strange. Also this may be unexpected for a reader of the code why class was used there instead of a namespace. I would say that namespace is a different concept, it doesn't technically implies more than adding name prefixes to resolve name conflicts. Where as class is a higher-level and more complex concept that should be used for solving more complex problems.

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Hello I have a question Why do we need namespace to avoid

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