Identifier styles in aptitude.

These are not followed 100%, but should generally be used for new
code.

1) Capitalization

Class names:

    class some_class_name
    {
    };

Template parameters:

    template<typename TemplateParam1, typename TemplateParam2>
    class foo { ... };

    template<typename Key, typename Val>
    class my_super_map { ... };

Note that single-character names are not used.  They should only be
used if the type is truly unimportant, such as in a container:

    template<typename T>
    class my_super_list { ... };

Member variables and member functions:

    class foo
    {
      int some_member_variable;
    };

    In some parts of aptitude, camelCase creeps in here; it is
    acceptable for new code, but dispreferred.

Macros:

    #define MY_MACRO

2) Accessors

For value classes, aptitude follows the get_NAME() pattern to retrieve
the value of the property NAME.  If there is a corresponding mutator,
use set_NAME(), but normally immutable objects are preferred.