numerous additions to stdlib, fix test.spl

std.spl

@@ -318,6 +318,21 @@ func nconcat { str | with amt ;
     _str
 }
 
+def cached-results MicroMap:new =cached-results
+func cache { ... | with arg-amt id body ;
+    def args arg-amt anew =args
+    def i arg-amt -- =i
+    while { i 0 lt not } {
+        "from stack"; i args:set;
+        i -- =i
+    }
+    def result [ args id ] cached-results:get =result
+    result null eq if {
+        args:to-stack body call dup =result [ args id ] swap cached-results:set;
+    }
+    result
+}
+
 func handle-panic { | with msg trace ;
     program-name dup if {
         program-name print " panicked at:" println

test.spl

@@ -2,6 +2,8 @@
 "#stream.spl" import
 "#http.spl" import
 
+"SPL tester" =program-name
+
 func main { int | with args ;
     def thing
 
@@ -124,11 +126,23 @@ func main { int | with args ;
     }
     "" println
 
+    "testing cache" println
+    2 cached-test _str println
+    3 cached-test _str println
+    2 cached-test _str println
+    3 cached-test _str println
+    "" println
+
     catch {
         "heya" throw
     } with { with e ;
-        e:object println
+        e:message println
     }
 
     100
 }
+
+func cached-test { mega | 1 "cached-test" cache <{ { mega | with i ;
+    i 2 *
+    "calculated " i _str concat println
+} } }