Add tasks for all the new languages

Task/Factorial/FunL/factorial-1.funl

@@ -0,0 +1,10 @@
+def factorial( n ) =
+  if n < 0
+    error( 'factorial: n should be non-negative' )
+  else
+    res = 1
+
+    for i <- 2..n
+      res *= i
+
+    res

Task/Factorial/FunL/factorial-2.funl

@@ -0,0 +1,5 @@
+def
+  factorial( (0|1) ) = 1
+  factorial( n )
+    | n > 0 = n*factorial( n - 1 )
+    | otherwise = error( 'factorial: n should be non-negative' )

Task/Factorial/FunL/factorial-3.funl

@@ -0,0 +1,8 @@
+def factorial( n )
+  | n >= 0 =
+    def
+      fact( acc, 0 ) = acc
+      fact( acc, n ) = fact( acc*n, n - 1 )
+
+    fact( 1, n )
+  | otherwise = error( 'factorial: n should be non-negative' )

Task/Factorial/FunL/factorial-4.funl

@@ -0,0 +1,3 @@
+def factorial( n )
+  | n >= 0 = product( 1..n )
+  | otherwise = error( 'factorial: n should be non-negative' )