Merge branch 'mc/ticks-optional'

* mc/ticks-optional:
  README: document ticks() and tick<void>()
  src:arduino-timer: make ticks calculation optional

Author: contrem

README.md

@@ -62,6 +62,23 @@ timer.in(1000, [](void*) -> bool { return false; });
 timer.in(1000, [](void *argument) -> bool { return argument; }, argument);
 ```
 
+Getting the number of **ticks** until the next *Task*
+```cpp
+auto ticks = timer.ticks(); // usefull for sleeping until the next task
+```
+```cpp
+void loop {
+    auto ticks = timer.tick(); // returns the number of ticks
+}
+```
+
+Avoiding **ticks** calculation inside of **tick**
+```cpp
+void loop {
+    timer.tick<void>(); // avoids ticks() calculation
+}
+```
+
 ### API
 
 ```cpp

src/arduino-timer.h

@@ -99,6 +99,13 @@ class Timer {
     /* Ticks the timer forward - call this function in loop() */
     unsigned long
     tick()
+    {
+        tick<void>();
+        return ticks();
+    }
+
+    template <typename R> void
+    tick()
     {
         for (size_t i = 0; i < max_tasks; ++i) {
             struct task * const task = &tasks[i];
@@ -115,8 +122,6 @@ class Timer {
                 }
             }
         }
-
-        return ticks();
     }
 
     /* Ticks until the next event */