cpp – C++

These notes are for people who have not used C++ in a long time – like myself.

Major interpreters and virtual machines written in C++ include:

• Hotspot (Java)
• CLR (.NET)
• HHVM (PHP/Hack)
• V8 (JavaScript)
• SpiderMonkey (JavaScript)
• Flash

Rule of Three – if a class requires one or more of these, then it probably needs all three:

• destructor
• copy constructor
• copy assignment operator

Initializer lists

• constructor can call constructors of members outside of constructor body
• Example: MyClass::MyClass():someMemberOtherType(1,'param') {}

There is no true concept of null or nil. NULL is simply a macro that expands to the number 0.

A const function e.g. someFunc(param) const {} makes it a compiler error for class function to change a member variable of the class.