Add Roman Numeral in Beef (#3730)

archive/b/beef/RomanNumeral.bf

@@ -0,0 +1,72 @@
+using System;
+
+namespace RomanNumeral;
+
+class Program
+{
+    public static void Usage()
+    {
+        Console.WriteLine("Usage: please provide a string of roman numerals");
+        Environment.Exit(0);
+    }
+
+    public static void Error()
+    {
+        Console.WriteLine("Error: invalid string of roman numerals");
+        Environment.Exit(0);
+    }
+
+    public static Result<int> RomanNumeral(StringView str)
+    {
+        int total = 0;
+        int prevDigit = 0;
+        for (char8 ch in str)
+        {
+            int digit = 0;
+            switch (ch)
+            {
+                case 'I': digit = 1;
+                case 'V': digit = 5;
+                case 'X': digit = 10;
+                case 'L': digit = 50;
+                case 'C': digit = 100;
+                case 'D': digit = 500;
+                case 'M': digit = 1000;
+                default: return .Err;
+            }
+
+            total += digit;
+
+            // If there is a previous digit and digit is greater than previous digit,
+            // subtract two times previous digit from total to compensate for addition of
+            // previous digit
+            if (prevDigit > 0 && digit > prevDigit)
+            {
+                total -= 2 * prevDigit;
+                prevDigit = 0;
+            }
+
+            prevDigit = digit;
+        }
+
+        return .Ok(total);
+    }
+
+    public static int Main(String[] args)
+    {
+        if (args.Count < 1)
+        {
+            Usage();
+        }
+
+        switch (RomanNumeral(args[0]))
+        {
+            case .Ok(let result):
+                Console.WriteLine(result);
+            case .Err:
+                Error();
+        }
+
+        return 0;
+    }
+}

archive/b/beef/testinfo.yml

@@ -4,7 +4,7 @@ folder:
 
 container:
   image: "rzuckerm/beef"
-  tag: "0.43.5a2-4"
+  tag: "0.43.5a4-6"
   build: |
     sh -c "BeefBuild -new -workspace={{ source.name }} && \
       cp {{ source.name }}{{ source.extension }} {{ source.name }}/src/Program.bf && \