idek stuff like stack

src/util/math.rs

@@ -26,7 +26,7 @@ macro_rules! impl_op {
                 }
             }
         }
-        impl $opa for $T {
+        impl const $opa for $T {
             fn $fna(&mut self, rhs: Self) {
                 $(self.$field.$fna(rhs.$field);)*
             }
@@ -49,7 +49,7 @@ macro_rules! impl_op {
                 }
             }
         }
-        impl $opa<f32> for $T {
+        impl const $opa<f32> for $T {
             fn $fna(&mut self, rhs: f32) {
                 $(self.$field.$fna(rhs);)*
             }