Effective C++ Ed. 3rd: Item 31. Minimize compilation dependencies between files

It is beneficial if the implementation changes in a library does not forces the clients to re-compile their code. But how would you minimize compilation dependencies? The key to this is replacement of dependencies on definitions with dependencies on declarations. There are following 2 ways:

• Handle classes: By employing pimple idiom in classes.
• Interface classes: By declaring abstract base class

Besides this, libraries should be implemented as declarations and definitions in separate header files. So that clients only include header files containing declarations only.

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