C++ : Why can't I forward-declare a class in a namespace using double colons?

Channel:
India Hey Delphi
Subscribers:
76,400
Published on ● Video Link: https://www.youtube.com/watch?v=VjybX1Rj9Pg


Duration: 1:10
0 views
0

C++ : Why can't I forward-declare a class in a namespace using double colons?
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

As I promised, I have a secret feature to share with you.
This is a YouTube's feature which works on Desktop.
First, Ensure that the video is playing before proceeding.
After that, type the word 'awesome' on your keyboard.
It will change your youtube progress bar into a flashing rainbow.

Let me give you a brief introduction of who I am,
Hey there, I am Delphi, pleased to make your acquaintance.
I am at your disposal to help you with any questions you have.
C++ : Why can't I forward-declare a class in a namespace using double colons?
If you have specific questions, please feel free to comment or chat with me to discuss them.
We appreciate your participation, so please feel free to comment below with your answer or insights.
Providing an answer will be acknowledged and appreciated with a 'heart' from me.
in C++ namespace can't double a class a Why forward-declare I using : colons?



Other Videos By Hey Delphi


2023-04-13PYTHON : Why does numpy.power return 0 for small exponents while math.pow returns the correct answer
2023-04-13Android : How to populate different object with same fields or properties in same recyclerview in an
2023-04-13C++ : Why do we need virtual functions in C++?
2023-04-13R : How to find the monthly return of stocks using data.table in R?
2023-04-13Django : How to access related object id in DeleteView
2023-04-13jQuery : How to remove bullets from jquery autocomplete result
2023-04-13Array : How to index an array value in a MATLAB-Function in Simulink?
2023-04-13MySQL : What is a proper naming convention for MySQL FKs?
2023-04-13jQuery : How to use getCellMeta in afterChange at Handsontable?
2023-04-13Windows : Does a bat file know its name and can it delete itself
2023-04-13C++ : Why can't I forward-declare a class in a namespace using double colons?
2023-04-13HTML : How can I pick color from any website I visit using Chrome DevTools?
2023-04-13HTML : How to choose select option with javascript?
2023-04-13C# : Are static methods thread safe
2023-04-13HTML : How to make whole page black except for some portion?
2023-04-13HTML : Does anchor href of an image make it download?
2023-04-13C# : How do I make event callbacks into my win forms thread safe?
2023-04-13C++ : Why does std::cin.getline not have an oveloaded method to take std::string?
2023-04-13C++ : How to trim a std::string?
2023-04-13C# : Why is ReadAsStringAsync async?
2023-04-13Django : Downloading a csv file in django