Famous design patterns that a C++ programmer should know

Question

Possible Duplicates:
list of c++ tricks with names
What C++ idioms should C++ programmers use?

After reading books like C++ Primer, Effective C++ and TC++PL I want to learn some important design patterns.

So, what are the famous design patterns that every C++ programmer should know?

Answer 1

Read the Design Patterns: Elements of Reusable Object-Oriented Software.

Answer 2

I suggest reading Head First Design Patterns. It's a fun read, and you'll learn about a lot of the common design patterns.

Answer 3

The obvious answer is the Gang-Of-Four patterns from the famous book. These are the same patterns that get listed all over the place.

http://en.wikipedia.org/wiki/Design_Patterns

Beyond that, have a look around Martin Fowlers web site...

http://martinfowler.com/

There's a fair bit on there - the "famous" one is probably "dependency injection". Most others are pretty domain specific, though.

"Mixin layers" can be interesting for C++. A template class takes its own base as a template parameter, so that the template can be used to add the same functionality to many different classes, or as a composition method so that various features can be easily included/excluded for a library. The curiously recurring template trick is sometimes used as well (the original base is the final fully-composed class) so that the various mixin layers can do some degree of "reflection", so that intermediate methods can be defined in terms of fully-composed member types etc. Of course it can be a bit prone to unresolvable cyclic dependencies, if you're not careful.

http://portal.acm.org/citation.cfm?id=505148

Answer 4

In no particular order, the Gang of Four patterns I see & use most are probably the following:

• Composite
• Template Method
• Abstract Factory
• Singleton (much hated, but everywhere)
• Visitor
• Builder
• Proxy

Answer 5

C++-specific ones: RAII and PIMPL.

Answer 6

The think pattern. It's a silver bullet.