printExp, printStr

src/kiss/Helpers.hx

@@ -323,6 +323,7 @@ class Helpers {
             interp.variables.set("readExpArray", Reader.readExpArray.bind(_, _, k));
             interp.variables.set("ReaderExp", ReaderExpDef);
             interp.variables.set("nextToken", Reader.nextToken.bind(_, "a token"));
+            interp.variables.set("printExp", printExp);
             interp.variables.set("kiss", {
                 ReaderExp: {
                     ReaderExpDef: ReaderExpDef
@@ -385,6 +386,17 @@ class Helpers {
         }
     }
 
+    public static function printExp(e:Dynamic, label = "") {
+        var toPrint = label;
+        if (label.length > 0) {
+            toPrint += ": ";
+        }
+        var expDef = if (e.def != null) e.def else e;
+        toPrint += Reader.toString(expDef);
+        Prelude.printStr(toPrint);
+        return e;
+    }
+
     static function evalUnquoteLists(l:Array<ReaderExp>, k:KissState, ?args:Map<String, Dynamic>):Array<ReaderExp> {
         var idx = 0;
         while (idx < l.length) {

src/kiss/Prelude.hx

@@ -322,12 +322,21 @@ class Prelude {
         return f;
     }
 
-    public static dynamic function print<T>(v:T):T {
+    public static dynamic function printStr(s:String) {
         #if (sys || hxnodejs)
-        Sys.println(v);
+        Sys.println(s);
         #else
-        trace(v);
+        trace(s);
         #end
+    }
+
+    public static function print<T>(v:T, label = ""):T {
+        var toPrint = label;
+        if (label.length > 0) {
+            toPrint += ": ";
+        }
+        toPrint += Std.string(v);
+        printStr(toPrint);
         return v;
     }
 

src/test/cases/GenerativeTestCase.kiss

@@ -28,7 +28,7 @@
                     ,@(_randomLengthMacroList _randomUncertainExp))}
         ])))
 (defMacro randomFalsyExp []
-    ~(_randomFalsyExp))
+    (printExp (_randomFalsyExp) "Falsy"))
 
 (defMacroFunction _randomTruthyExp []
     ((chooseRandom
@@ -37,7 +37,7 @@
             ->{(_randomLetterString)}
         ])))
 (defMacro randomTruthyExp []
-    ~(_randomTruthyExp))
+    (printExp (_randomTruthyExp) "Truthy"))
 
 (defMacroFunction _randomUncertainExp []
     ((chooseRandom