maths: make pow constexpr

2015-01-28 14:57:37 +11:00 · 2015-01-28 14:57:37 +11:00 · e4a93fe23c
commit e4a93fe23c
parent af7f01efd3
1 changed files with 2 additions and 7 deletions
--- a/maths.ipp
+++ b/maths.ipp
@ -38,13 +38,8 @@ align (T value, U size) {

 //-----------------------------------------------------------------------------
 template <typename T>
-T
+constexpr T
 pow (T x, unsigned y)
 {
-    T v = 1;
-
-    for (unsigned i = 1; i <= y; ++i)
-        v *= x;
-
-    return v;
+    return y == 0 ? 1 : x * pow (x, y - 1);
 }