Use const spans in pow2

.tool-versions

@@ -1 +1 @@
-scarb 2.6.4
+scarb nightly-2024-04-20

src/utils/types/words64.cairo

@@ -264,138 +264,71 @@ fn reverse_endianness_u64(input: u64, significant_bytes: Option<u32>) -> u64 {
     }
 }
 
-// This should be replaced with a "dw" equivalent when the compiler supports it
 fn pow2(pow: usize) -> u64 {
-    if pow == 0 {
-        return 0x1;
-    } else if pow == 1 {
-        return 0x2;
-    } else if pow == 2 {
-        return 0x4;
-    } else if pow == 3 {
-        return 0x8;
-    } else if pow == 4 {
-        return 0x10;
-    } else if pow == 5 {
-        return 0x20;
-    } else if pow == 6 {
-        return 0x40;
-    } else if pow == 7 {
-        return 0x80;
-    } else if pow == 8 {
-        return 0x100;
-    } else if pow == 9 {
-        return 0x200;
-    } else if pow == 10 {
-        return 0x400;
-    } else if pow == 11 {
-        return 0x800;
-    } else if pow == 12 {
-        return 0x1000;
-    } else if pow == 13 {
-        return 0x2000;
-    } else if pow == 14 {
-        return 0x4000;
-    } else if pow == 15 {
-        return 0x8000;
-    } else if pow == 16 {
-        return 0x10000;
-    } else if pow == 17 {
-        return 0x20000;
-    } else if pow == 18 {
-        return 0x40000;
-    } else if pow == 19 {
-        return 0x80000;
-    } else if pow == 20 {
-        return 0x100000;
-    } else if pow == 21 {
-        return 0x200000;
-    } else if pow == 22 {
-        return 0x400000;
-    } else if pow == 23 {
-        return 0x800000;
-    } else if pow == 24 {
-        return 0x1000000;
-    } else if pow == 25 {
-        return 0x2000000;
-    } else if pow == 26 {
-        return 0x4000000;
-    } else if pow == 27 {
-        return 0x8000000;
-    } else if pow == 28 {
-        return 0x10000000;
-    } else if pow == 29 {
-        return 0x20000000;
-    } else if pow == 30 {
-        return 0x40000000;
-    } else if pow == 31 {
-        return 0x80000000;
-    } else if pow == 32 {
-        return 0x100000000;
-    } else if pow == 33 {
-        return 0x200000000;
-    } else if pow == 34 {
-        return 0x400000000;
-    } else if pow == 35 {
-        return 0x800000000;
-    } else if pow == 36 {
-        return 0x1000000000;
-    } else if pow == 37 {
-        return 0x2000000000;
-    } else if pow == 38 {
-        return 0x4000000000;
-    } else if pow == 39 {
-        return 0x8000000000;
-    } else if pow == 40 {
-        return 0x10000000000;
-    } else if pow == 41 {
-        return 0x20000000000;
-    } else if pow == 42 {
-        return 0x40000000000;
-    } else if pow == 43 {
-        return 0x80000000000;
-    } else if pow == 44 {
-        return 0x100000000000;
-    } else if pow == 45 {
-        return 0x200000000000;
-    } else if pow == 46 {
-        return 0x400000000000;
-    } else if pow == 47 {
-        return 0x800000000000;
-    } else if pow == 48 {
-        return 0x1000000000000;
-    } else if pow == 49 {
-        return 0x2000000000000;
-    } else if pow == 50 {
-        return 0x4000000000000;
-    } else if pow == 51 {
-        return 0x8000000000000;
-    } else if pow == 52 {
-        return 0x10000000000000;
-    } else if pow == 53 {
-        return 0x20000000000000;
-    } else if pow == 54 {
-        return 0x40000000000000;
-    } else if pow == 55 {
-        return 0x80000000000000;
-    } else if pow == 56 {
-        return 0x100000000000000;
-    } else if pow == 57 {
-        return 0x200000000000000;
-    } else if pow == 58 {
-        return 0x400000000000000;
-    } else if pow == 59 {
-        return 0x800000000000000;
-    } else if pow == 60 {
-        return 0x1000000000000000;
-    } else if pow == 61 {
-        return 0x2000000000000000;
-    } else if pow == 62 {
-        return 0x4000000000000000;
-    } else if pow == 63 {
-        return 0x8000000000000000;
-    } else {
-        return 0;
-    }
+    *[
+        0x1,
+        0x2,
+        0x4,
+        0x8,
+        0x10,
+        0x20,
+        0x40,
+        0x80,
+        0x100,
+        0x200,
+        0x400,
+        0x800,
+        0x1000,
+        0x2000,
+        0x4000,
+        0x8000,
+        0x10000,
+        0x20000,
+        0x40000,
+        0x80000,
+        0x100000,
+        0x200000,
+        0x400000,
+        0x800000,
+        0x1000000,
+        0x2000000,
+        0x4000000,
+        0x8000000,
+        0x10000000,
+        0x20000000,
+        0x40000000,
+        0x80000000,
+        0x100000000,
+        0x200000000,
+        0x400000000,
+        0x800000000,
+        0x1000000000,
+        0x2000000000,
+        0x4000000000,
+        0x8000000000,
+        0x10000000000,
+        0x20000000000,
+        0x40000000000,
+        0x80000000000,
+        0x100000000000,
+        0x200000000000,
+        0x400000000000,
+        0x800000000000,
+        0x1000000000000,
+        0x2000000000000,
+        0x4000000000000,
+        0x8000000000000,
+        0x10000000000000,
+        0x20000000000000,
+        0x40000000000000,
+        0x80000000000000,
+        0x100000000000000,
+        0x200000000000000,
+        0x400000000000000,
+        0x800000000000000,
+        0x1000000000000000,
+        0x2000000000000000,
+        0x4000000000000000,
+        0x8000000000000000,
+    ].span().at(pow)
 }
-