Use macro for PI, as std::acos is not constexpr.

dhebbeker · dhebbeker · commit 2d5c9c671bfb · 2021-05-05T21:41:57.000+02:00
diff --git a/robot-control-src/board.hpp b/robot-control-src/board.hpp
@@ -7,7 +7,7 @@
 #include <MCP23017.h>
 
 typedef decltype(millis()) Milliseconds;
-constexpr auto pi = std::acos(-1);
+constexpr auto pi = M_PI;
 
 namespace board
 {

Original file line number	Diff line number	Diff line change
`@@ -7,7 +7,7 @@`
`7`	`7`	`#include <MCP23017.h>`
`8`	`8`
`9`	`9`	`typedef decltype(millis()) Milliseconds;`
`10`		`-constexpr auto pi = std::acos(-1);`
	`10`	`+constexpr auto pi = M_PI;`
`11`	`11`
`12`	`12`	`namespace board`
`13`	`13`	`{`