Merge pull request #110 from algernon/f/typesafe-USE

Add a USE() macro
pull/112/head
Jesse Vincent 8 years ago committed by GitHub
commit 2c647f8655

@ -34,6 +34,24 @@ extern HARDWARE_IMPLEMENTATION KeyboardHardware;
#define KEYMAP_SIZE (sizeof(keymaps) / ROWS / COLS / sizeof(Key))
/*
* The `USE_PLUGINS()` macro is a clever hack, to make it seem like
* `Kaleidoscope.use()` is type-safe. It pushes its arguments into an
* appropriately typed array, so anything that does not fit the criteria, will
* trigger a compiler error.
*
* It then never uses the array, and passes the plugins over to
* `Kaleidoscope.use`, adding the trailing `NULL`, making it even easier to use.
*
* Since the array this macro creates is never used, the compiler will optimize
* it out fully. As such, by using this macro, we incur neither any size
* penalties, nor any run-time penalties. Everything happens at compile-time.
*/
#define USE_PLUGINS(plugins...) ({ \
static KaleidoscopePlugin *__p[] = {plugins, NULL}; \
Kaleidoscope.use(plugins, NULL); \
})
class KaleidoscopePlugin {
public:
virtual void begin(void) = 0;

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