diff --git a/nasal_gc.h b/nasal_gc.h
index 552f93a1..3c2977a2 100644
--- a/nasal_gc.h
+++ b/nasal_gc.h
@@ -157,17 +157,12 @@ nasal_ref* nasal_vec::get_mem(const int index)
 void nasal_vec::print()
 {
     static int depth=0;
-    if(!elems.size())
+    if(!elems.size() || depth>8)
     {
-        std::cout<<"[]";
-        return;
-    }
-    if(++depth>16)
-    {
-        std::cout<<"[..]";
-        --depth;
+        std::cout<<(elems.size()?"[..]":"[]");
         return;
     }
+    ++depth;
     size_t iter=0;
     std::cout<<'[';
     for(auto& i:elems)
@@ -219,17 +214,12 @@ nasal_ref* nasal_hash::get_mem(const std::string& key)
 void nasal_hash::print()
 {
     static int depth=0;
-    if(!elems.size())
-    {
-        std::cout<<"{}";
-        return;
-    }
-    if(++depth>16)
+    if(!elems.size() || depth>8)
     {
-        std::cout<<"{..}";
-        --depth;
+        std::cout<<(elems.size()?"{..}":"{}");
         return;
     }
+    ++depth;
     size_t iter=0;
     std::cout<<'{';
     for(auto& i:elems)
diff --git a/test/calc.nas b/test/calc.nas
index f4b9b1ae..cb25994f 100644
--- a/test/calc.nas
+++ b/test/calc.nas
@@ -1,50 +1,96 @@
 import("lib.nas");
-var filename=[
-    "main.cpp",
-    "nasal_err.h",
-    "nasal_ast.h",
-    "nasal_builtin.h",
-    "nasal_codegen.h",
-    "nasal_opt.h",
-    "nasal_gc.h",
-    "nasal_import.h",
-    "nasal_lexer.h",
-    "nasal_parse.h",
-    "nasal_vm.h",
-    "nasal_dbg.h",
-    "nasal.h"
+var source=[
+    "main.cpp              ",
+    "nasal_err.h           ",
+    "nasal_ast.h           ",
+    "nasal_builtin.h       ",
+    "nasal_codegen.h       ",
+    "nasal_opt.h           ",
+    "nasal_gc.h            ",
+    "nasal_import.h        ",
+    "nasal_lexer.h         ",
+    "nasal_parse.h         ",
+    "nasal_vm.h            ",
+    "nasal_dbg.h           ",
+    "nasal.h               "
 ];
-var space=[
-    "       ",
-    "    ",
-    "    ",
-    "",
-    "",
-    "    ",
-    "     ",
-    " ",
-    "  ",
-    "  ",
-    "     ",
-    "    ",
-    "        "
+
+var lib=[
+    "stl/lib.nas           ",
+    "stl/list.nas          ",
+    "stl/queue.nas         ",
+    "stl/result.nas        ",
+    "stl/sort.nas          ",
+    "stl/stack.nas         "
 ];
+
+var testfile=[
+    "test/ascii-art.nas    ",
+    "test/auto_crash.nas   ",
+    "test/bf.nas           ",
+    "test/bfconvertor.nas  ",
+    "test/bfs.nas          ",
+    "test/bigloop.nas      ",
+    "test/bp.nas           ",
+    "test/calc.nas         ",
+    "test/choice.nas       ",
+    "test/class.nas        ",
+    "test/exception.nas    ",
+    "test/fib.nas          ",
+    "test/filesystem.nas   ",
+    "test/hexdump.nas      ",
+    "test/json.nas         ",
+    "test/leetcode1319.nas ",
+    "test/lexer.nas        ",
+    "test/life.nas         ",
+    "test/loop.nas         ",
+    "test/mandel.nas       ",
+    "test/mandelbrot.nas   ",
+    "test/module_test.nas  ",
+    "test/nasal_test.nas   ",
+    "test/pi.nas           ",
+    "test/prime.nas        ",
+    "test/props.nas        ",
+    "test/quick_sort.nas   ",
+    "test/scalar.nas       ",
+    "test/trait.nas        ",
+    "test/turingmachine.nas",
+    "test/ycombinator.nas  "
+];
+
+var module=[
+    "module/fib.cpp        "
+];
+
+var getname=func(s){
+    var (len,ch)=(size(s),' '[0]);
+    for(var i=0;i<len and s[i]!=ch;i+=1);
+    return substr(s,0,i);
+}
+
 var count=func(s,c){
     var (cnt,len,ch)=(0,size(s),c[0]);
     for(var i=0;i<len;i+=1)
         cnt+=(s[i]==ch);
     return cnt;
 }
-func(){
-    var (bytes,line,semi)=(0,0,0);
-    forindex(var i;filename){
-        var s=io.fin(filename[i]);
-        var (line_cnt,semi_cnt)=(count(s,'\n'),count(s,';'));
-        println(filename[i],space[i],'| ',line_cnt,' \tline | ',semi_cnt,' \tsemi');
+
+var calc=func(codetype,files){
+    println(codetype);
+    var (bytes,line,semi,line_cnt,semi_cnt)=(0,0,0,0,0);
+    forindex(var i;files){
+        var s=io.fin(getname(files[i]));
+        (line_cnt,semi_cnt)=(count(s,'\n'),count(s,';'));
+        println(files[i],'| ',line_cnt,' \tline | ',semi_cnt,' \tsemi');
         bytes+=size(s);
         line+=line_cnt;
         semi+=semi_cnt;
     }
-    println('total:         | ',line,' \tline | ',semi,' \tsemi');
-    println('bytes:         | ',bytes,' bytes| ',int(bytes/1024),' \tkb');
-}();
\ No newline at end of file
+    println('total:                | ',line,' \tline | ',semi,' \tsemi');
+    println('bytes:                | ',bytes,'\tbytes| ',int(bytes/1024),' \tkb');
+}
+
+calc("source code:",source);
+calc("lib:",lib);
+calc("test file:",testfile);
+calc("module:",module);
\ No newline at end of file