[sm919][jlq19] Add tests for clojures

valid/function/closures/closureManyOutsideVars.wacc

+# a simple closure with closure function taking in many closure variables
+
+# Output:
+# 23
+
+# Exit:
+# 0
+
+# Program:
+
+begin
+  int{int} f(int x, int a, int b, int c, int d) is
+    return (\(int y) -> d + x + y + a + b + c)
+  end
+
+  int{int} x = call f(2, 1, 3, 10, 4);
+  int y = call x(3);
+  println y
+end
\ No newline at end of file

valid/function/closures/closureOnlyLambdas.wacc

+# a simple closure with closure function that only uses lambdas
+
+# Output:
+# 208
+
+# Exit:
+# 0
+
+# Program:
+
+begin
+  int a1 = 2 ;
+  int{int, int} f1 = \(int c, int d) -> a1 + c + d ;
+  int{int, int} x = \(int a, int b) -> call f1 (2, 3) + a + b + a1 ;
+  int y = call x(100, 99) ;
+  println y
+end
\ No newline at end of file

valid/function/closures/closureReturnFuncFromLambda.wacc

+# a simple closure that uses a lambda to return a function pointer
+
+# Output:
+# 100
+
+# Exit:
+# 0
+
+# Program:
+
+begin
+  int g(int a) is
+    return a
+  end
+
+  int a1 = 2 ;
+  int{int}{int, int} f1 = \(int c, int d) -> g ;
+  int{int} x = call f1(a1, a1) ;
+  int y = call x(100) ;
+  println y
+end
\ No newline at end of file

valid/function/nested_functions/fixedPointRealArithmetic.wacc

@@ -28,9 +28,9 @@ begin
 	
 	int f() is
 		int qq = call q() ;
-		# f = 2**q
-		int f = call power(2, qq) ;
-		return f
+		# f = 2**q ;
+		int g = call power(2, qq) ;
+		return g
 	end
 	
 	# The implementation of the following functions are translated from the URI above.