Let’s say I have a program which uses n big modules:
B) I/O files
C) I/O database
Of course, a list of modules could be bigger.
Let’s say I want to have some global variable, but with a scope limited to a single module.
As an example, let’s say that I/O database module will consist of 10 classes, each representing each table in a database, but it needs some
global const state like
Name of table A,
Columns of table A etc. (as it is a relational database, in table D I may need to use table A).
It is also obvious, that I do not need to access these table names through Network/Communication module. Is there a way to make a variable "globally" accessible only for some part of classes?
Just for clarification – I know that "Global for some part" is a contradiction, but my idea is that I want to keep the accessibility(no need of pointer passing to each object), while limiting the place from where it can be called (for example, limit from global to module scope)
Source: Windows Questions C++