Design patterns implemented in C++

Design patterns (Gang of Four) implemented in C++. These are both standalone patterns and highly intertwined.

You can find here:

1. creational design patterns
   • singleton
     • simple
     • curiously recurring template
   • prototype
   • abstract factory
   • builder
2. structural design patterns
   • adapter
     • class adapter
     • object adapter
   • composite
   • bridge
   • decorator
     • class based
     • lambda based
   • proxy
   • decorator
   • flyweight
3. behavioural design patterns
   • chain of responsibility
   • visitor
   • observer
   • iterator
   • template method
   • interpreter
   • command