What is the difference between a Bridge pattern and a Pimpl?

Posted on 2004-10-05
Medium Priority
Last Modified: 2008-03-17
I'm reading Design Pattern, and it's description of a Bridge pattern sounds a lot like a Pimpl.

What is the difference between a Bridge pattern and a Pimpl?

Please give example, because that's the best way I can understand it.
Question by:TomoMaili
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Expert Comment

ID: 12231596
The pimpl idiom is useful for reducing physical compile time dependencies. In larger projects, reducing compile times can be very important.
The purpose of Bridge is to allow a Class to be extended in two independent ways.
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Accepted Solution

Axter earned 2000 total points
ID: 12231618
With Herb Sutter's Pimpl Idiom the outside class is not an "Abstraction" and
the inside class can only be of one specific type. With (Design Patterns) Bridge
pattern, the outside class is a true abstraction that can be implemented
in any of several different ways, while the inner class is *also* an
abstraction that can be implemented in any of several different ways.

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