STM32MP1 support available in SW4STM32

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world.
And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4; you can download a short video showcasing this on the ac6-tools website (registration required).

System Workbench for STM32

You are viewing a reply to No break at the end of case  

No break at the end of case


Hi everybody,

Effectively, the break at the end of a case is optional, and the code will just continue in the next case alternative; this may even be useful in some situations, avoiding to duplicate code.

However it is widely considered as bad practice to fall from a specific case alternative to the default alternative or to omit the break at the end of the last case of a switch; this is the reason of the warning emitted here.

This warning is emitted as it is quite current that a forgotten break, at the end of the last case of a switch, if additional cases are subsequently added will, by error, fall down into the added alternative.

In the example given what is really needed is having a break before the default; suppressing the default is a bad idea that only works because the default alternative is empty. Furthermore static code analyzers will likely consider an error to have a break without a default, so the inner switch may also need a default alternative, that, as Richard states, may be placed anywhere in the switch body (although it is customary to place it either at end or at beginning of the switch).