Use preferred declaration style

Enforce function declaration style  

Enforce usage of the trailing return type or the regular return type syntax.

Enforce nested namespaces style  

Enforce the syntax used to define nested namespaces.

Enforce type alias code style  

Enforce usage of typedefs or type aliases depending on the syntax style setting.

Order of definitions does not match the order of declaration  

Order of definitions does not match the order of declaration.