How to resolve circular dependencies in C++

Asked Sep 24 '20 at 11:07

Active Sep 24 '20 at 11:07

Viewed 27 times

Class A
{
}

Class B
{
    B(A* App);
}

Here Class A is main class which handles creation of Object B as per requirements. When Object of Class B is created objected of A is passed as argument. It all work fine if everything is defined in A.h and A.cpp but After moving code related to Class B in B.h and B.cpp I'm getting error as syntax error : identifier 'A'

asked Sep 24 '20 at 11:07

Ramesh

We use forward declarations. – einpoklum Sep 24 '20 at 11:09
Forward declare Class A with `class A;` in the header of B. – Raildex Sep 24 '20 at 11:09
1

There is no circular dependency in code you present. Please provide [mcve], including full error message. – Yksisarvinen Sep 24 '20 at 11:09
you should read about forward declaration – Moia Sep 24 '20 at 11:09
If the forward-declarations question doesn't answer your question here, please provide a proper example, edit the question and ask for a reopen. – einpoklum Sep 24 '20 at 11:10

How to resolve circular dependencies in C++

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