Int parser

Option.cs

@@ -90,16 +90,26 @@ public static Option<R> map<A, R>(this Option<A> @this, Func<A, R> func) {
                 () => Option.None, value => Option.Some(func(value)));
         }
 
-    public static Option<A> orElse<A>(this Option<A> @this, Func<Option<A>> optional) => !@this.isSome ? optional() : @this;
+     public static Option<C> orElse<A,B,C>(this Option<A> @this, Func<Option<B>> optional, Func<A,C> mapThis, Func<B,C> mapAnother) {
+      if (@this.isSome)
+        return mapThis(@this._unsafe);
+      else {
+        var another = optional();
+        if (another.isSome)
+          return mapAnother(another._unsafe);
+        else
+          return Option.None;
+      }
+    }
 
-      public static bool exist<A>(this Option<A> @this, Option<A> other) =>
+    public static bool exist<A>(this Option<A> @this, Option<A> other) =>
       @this.fold(
         () => false,
         left => other.fold(
           () => false,
           right => left.Equals(right)
-            )
-          );
+        )
+      );
 
         public static Option<R> flatMap<A, R>(this Option<A> @this, Func<A, Option<R>> func) {
             return @this.fold(

ValueTypes/Int.cs

@@ -0,0 +1,8 @@
+namespace funkylib.ValueTypes {
+  public static class Int {
+    public static Option<int> parse(string s) {
+      int temp;
+      return int.TryParse(s, out temp) ? temp.some() : Option.None;
+    }
+  }
+}

bin/Release/nunit_random_seed.tmp

@@ -1 +1 @@
-1253614604
+1629596981

funkylib.csproj

@@ -58,6 +58,7 @@
     <Compile Include="Try.cs" />
     <Compile Include="Validation.cs" />
     <Compile Include="ValueTypes\Double.cs" />
+    <Compile Include="ValueTypes\Int.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="packages.config" />

obj/Release/CoreCompileInputs.cache

@@ -1 +1 @@
-ba6ea9c893a17fe351c643ce2c126e5673414ff3
+f49cd14fa23015f92a2083595c46e8b0c09a9054