Add temporary unimplemented mark before proper implementation

Author: ueco-jb

packages/std/src/math/uint256.rs

@@ -211,8 +211,7 @@ impl Uint256 {
     }
 
     pub fn pow(self, exp: u32) -> Self {
-        self.checked_pow(exp)
-            .expect("attempt to raise to a power with overflow")
+        unimplemented!()
     }
 
     pub fn checked_add(self, other: Self) -> Result<Self, OverflowError> {

packages/std/src/math/uint512.rs

@@ -309,6 +309,10 @@ impl Uint512 {
         self.0.is_zero()
     }
 
+    pub fn pow(self, exp: u32) -> Self {
+        unimplemented!()
+    }
+
     pub fn checked_add(self, other: Self) -> Result<Self, OverflowError> {
         self.0
             .checked_add(other.0)