* Put a space before the parentheses in **if**, **switch**, **for** and **while** statements.
* Use curly braces and put the contained statements on their own lines (e.g., don't put them directly after the **if**).
* Opening curly bracket **{** stays on the first line, closing curly bracket **}** gets a line to itself (except for the **}** preceding an **else**, which should be on the same line as the **else**).
* When only a single statement is contained, the brackets can be omitted. In this case, put the single statement on the same line as the preceding keyword (**if**, **while**, etc.). Note that this is only allowed for if statements without an **else** clause.
* All fall throughs must be documented, using a **FALLTHROUGH**define/macro.
* Non-trivial fall throughs must be documented, using a `[[fallthrough]]` attribute.
* The NOT_REACHED() macro can be used in default constructs that should never be reached.
* Unconditional loops are written with **`for (;;) {`**