Day 5 (#4)

Co-authored-by: Smaug123 <patrick+github@patrickstevens.co.uk>
Reviewed-on: #4

AdventOfCode2023.FSharp/AdventOfCode2023.FSharp.Lib/EfficientString.fs

@@ -95,3 +95,15 @@ module StringSplitEnumerator =
             failwith "expected an int, got nothing"
 
         Int32.Parse e.Current
+
+    let consumeU32 (e : byref<StringSplitEnumerator>) : uint32 =
+        if not (e.MoveNext ()) then
+            failwith "expected an int, got nothing"
+
+        UInt32.Parse e.Current
+
+    let consumeU64 (e : byref<StringSplitEnumerator>) : uint64 =
+        if not (e.MoveNext ()) then
+            failwith "expected an int, got nothing"
+
+        UInt64.Parse e.Current