language-discussions.md

-* `C++ Standard 17`: nt. cf. #208 
+* `C++ Standard 17`: We use c++17 cf. #28 
+* `Forward declarations`: Avoid wherever possible. cf. #56 
 * `auto`: use it *only* to express intent. cf. #208 
+* `boost`: Only use packages that are specified in this [list](what-boost-to-use) (if you need more, discuss it) cf. #100
+* `Return by const ref or value`: We prefer return by value over `const ref` unless we know we pass out _really_ big objects, e.g. a `string` containing the contents of a file. cf. #114
+* `Rule of 5`: If you have a user-defined destructor, copy constructor, copy assignment operator, move constructor or move assignment operator, you have to have all 5. cf. #179
+* `final`: use to communicate intention. cf. #200
+* `constexpr`: allowed, but only if `const`/`constexpr` are used consistently inside a class. cf. #200
+* `noexcept`: not to be used since we aim at not throwing exceptions. cf. #200
+* `exceptions`: Throw exceptions for not recoverable failures in constructors. cf. #314
+* `friend`: Avoid where possible. cf. #206
+* `Method length`: Break up functions to the point where they only do one thing if possible. cf #122
+* `Translation & Rotation`: Instead of Position and Orientation. cf #159
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