ni_nitdoc: added fast copy past utility to signatures.

[nit.git] / c_src / metamodel___partial_order._sep.c

diff --git a/c_src/metamodel___partial_order._sep.c b/c_src/metamodel___partial_order._sep.c
index fc88105..3f1a2c8 100644 (file)
--- a/c_src/metamodel___partial_order._sep.c
+++ b/c_src/metamodel___partial_order._sep.c
@@ -1,5 +1,6 @@
 /* This C file is generated by NIT to compile module metamodel___partial_order. */
 #include "metamodel___partial_order._sep.h"
+static const char LOCATE_metamodel___partial_order___PartialOrder___roots[] = "partial_order::PartialOrder::roots";
 val_t metamodel___partial_order___PartialOrder___roots(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -10,9 +11,10 @@ val_t metamodel___partial_order___PartialOrder___roots(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___roots;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:30 */
+  /* metamodel/partial_order.nit:30 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____roots(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -22,6 +24,7 @@ val_t metamodel___partial_order___PartialOrder___roots(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___is_empty[] = "partial_order::PartialOrder::(abstract_collection::Collection::is_empty)";
 val_t metamodel___partial_order___PartialOrder___is_empty(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -32,21 +35,23 @@ val_t metamodel___partial_order___PartialOrder___is_empty(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___is_empty;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:35 */
+  /* metamodel/partial_order.nit:35 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Uninitialized attribute %s", "_elements", LOCATE_metamodel___partial_order, 35);
   }
   fra.me.REG[0] = ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0]);
-  REGB0 = CALL_standard___collection___abstract_collection___Collection___is_empty(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = CALL_standard___collection___abstract_collection___MapRead___is_empty(fra.me.REG[0])(fra.me.REG[0]);
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___length[] = "partial_order::PartialOrder::(abstract_collection::Collection::length)";
 val_t metamodel___partial_order___PartialOrder___length(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -57,21 +62,23 @@ val_t metamodel___partial_order___PartialOrder___length(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___length;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:37 */
+  /* metamodel/partial_order.nit:37 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Uninitialized attribute %s", "_elements", LOCATE_metamodel___partial_order, 37);
   }
   fra.me.REG[0] = ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0]);
-  REGB0 = CALL_standard___collection___abstract_collection___Collection___length(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = CALL_standard___collection___abstract_collection___MapRead___length(fra.me.REG[0])(fra.me.REG[0]);
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___first[] = "partial_order::PartialOrder::(abstract_collection::Collection::first)";
 val_t metamodel___partial_order___PartialOrder___first(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -82,9 +89,10 @@ val_t metamodel___partial_order___PartialOrder___first(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___first;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:39 */
+  /* metamodel/partial_order.nit:39 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements_list(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -97,6 +105,7 @@ val_t metamodel___partial_order___PartialOrder___first(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___has[] = "partial_order::PartialOrder::(abstract_collection::Collection::has)";
 val_t metamodel___partial_order___PartialOrder___has(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -107,11 +116,12 @@ val_t metamodel___partial_order___PartialOrder___has(val_t p0, val_t p1){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___has;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:41 */
+  /* metamodel/partial_order.nit:41 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -124,6 +134,7 @@ val_t metamodel___partial_order___PartialOrder___has(val_t p0, val_t p1){
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___has_only[] = "partial_order::PartialOrder::(abstract_collection::Collection::has_only)";
 val_t metamodel___partial_order___PartialOrder___has_only(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -136,26 +147,27 @@ val_t metamodel___partial_order___PartialOrder___has_only(val_t p0, val_t p1){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___has_only;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:43 */
+  /* metamodel/partial_order.nit:43 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Uninitialized attribute %s", "_elements", LOCATE_metamodel___partial_order, 43);
   }
   fra.me.REG[2] = ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0]);
-  REGB0 = CALL_standard___collection___abstract_collection___Collection___length(fra.me.REG[2])(fra.me.REG[2]);
+  REGB0 = CALL_standard___collection___abstract_collection___MapRead___length(fra.me.REG[2])(fra.me.REG[2]);
   REGB1 = TAG_Int(1);
   REGB2 = TAG_Bool(IS_EQUAL_OO(REGB0,REGB1));
   if (UNTAG_Bool(REGB2)) {
   } else {
-    /* ./../lib/standard//kernel.nit:210 */
+    /* ../lib/standard/kernel.nit:230 */
     REGB1 = TAG_Bool((REGB0)==(REGB1));
-    /* ./metamodel//partial_order.nit:43 */
+    /* metamodel/partial_order.nit:43 */
     REGB2 = REGB1;
   }
   if (UNTAG_Bool(REGB2)) {
@@ -165,13 +177,14 @@ val_t metamodel___partial_order___PartialOrder___has_only(val_t p0, val_t p1){
       nit_abort("Uninitialized attribute %s", "_elements", LOCATE_metamodel___partial_order, 43);
     }
     fra.me.REG[0] = ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0]);
+    fra.me.REG[0] = CALL_standard___collection___abstract_collection___MapRead___values(fra.me.REG[0])(fra.me.REG[0]);
     fra.me.REG[0] = CALL_standard___collection___abstract_collection___Collection___first(fra.me.REG[0])(fra.me.REG[0]);
     REGB2 = TAG_Bool(IS_EQUAL_ON(fra.me.REG[1],fra.me.REG[0]));
     if (UNTAG_Bool(REGB2)) {
     } else {
       REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
-        REGB1 = TAG_Bool(false);
+        REGB1 = TAG_Bool(0);
         REGB2 = REGB1;
       } else {
         REGB1 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
@@ -179,7 +192,7 @@ val_t metamodel___partial_order___PartialOrder___has_only(val_t p0, val_t p1){
       }
     }
   } else {
-    REGB1 = TAG_Bool(false);
+    REGB1 = TAG_Bool(0);
     REGB2 = REGB1;
   }
   goto label1;
@@ -187,6 +200,7 @@ val_t metamodel___partial_order___PartialOrder___has_only(val_t p0, val_t p1){
   stack_frame_head = fra.me.prev;
   return REGB2;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___count[] = "partial_order::PartialOrder::(abstract_collection::Collection::count)";
 val_t metamodel___partial_order___PartialOrder___count(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -198,18 +212,19 @@ val_t metamodel___partial_order___PartialOrder___count(val_t p0, val_t p1){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___count;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:47 */
+  /* metamodel/partial_order.nit:47 */
   REGB0 = CALL_standard___collection___abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
   if (UNTAG_Bool(REGB0)) {
-    /* ./metamodel//partial_order.nit:48 */
+    /* metamodel/partial_order.nit:48 */
     REGB0 = TAG_Int(1);
     goto label1;
   } else {
-    /* ./metamodel//partial_order.nit:50 */
+    /* metamodel/partial_order.nit:50 */
     REGB1 = TAG_Int(0);
     REGB0 = REGB1;
     goto label1;
@@ -218,6 +233,7 @@ val_t metamodel___partial_order___PartialOrder___count(val_t p0, val_t p1){
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___iterator[] = "partial_order::PartialOrder::(abstract_collection::Collection::iterator)";
 val_t metamodel___partial_order___PartialOrder___iterator(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -228,9 +244,10 @@ val_t metamodel___partial_order___PartialOrder___iterator(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___iterator;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:54 */
+  /* metamodel/partial_order.nit:54 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements_list(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -243,6 +260,7 @@ val_t metamodel___partial_order___PartialOrder___iterator(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder_____bra[] = "partial_order::PartialOrder::[]";
 val_t metamodel___partial_order___PartialOrder_____bra(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -253,11 +271,12 @@ val_t metamodel___partial_order___PartialOrder_____bra(val_t p0, val_t p1){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder_____bra;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:61 */
+  /* metamodel/partial_order.nit:61 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -270,6 +289,7 @@ val_t metamodel___partial_order___PartialOrder_____bra(val_t p0, val_t p1){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[1];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___to_dot[] = "partial_order::PartialOrder::to_dot";
 val_t metamodel___partial_order___PartialOrder___to_dot(val_t p0){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -281,24 +301,26 @@ val_t metamodel___partial_order___PartialOrder___to_dot(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___to_dot;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:67 */
+  /* metamodel/partial_order.nit:67 */
   fra.me.REG[1] = NEW_Buffer_standard___string___Buffer___init();
-  /* ./metamodel//partial_order.nit:68 */
+  /* metamodel/partial_order.nit:68 */
   fra.me.REG[2] = CALL_metamodel___partial_order___PartialOrder___to_dot_header(fra.me.REG[0])(fra.me.REG[0]);
   CALL_standard___collection___abstract_collection___Sequence___append(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
-  /* ./metamodel//partial_order.nit:69 */
+  /* metamodel/partial_order.nit:69 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Uninitialized attribute %s", "_elements", LOCATE_metamodel___partial_order, 69);
   }
   fra.me.REG[2] = ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0]);
+  fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead___values(fra.me.REG[2])(fra.me.REG[2]);
   CALL_standard___collection___abstract_collection___Collection___iterate(fra.me.REG[2])(fra.me.REG[2], (&(fra.me)), ((fun_t)OC_metamodel___partial_order___PartialOrder___to_dot_1));
-  /* ./metamodel//partial_order.nit:75 */
+  /* metamodel/partial_order.nit:75 */
   if (!once_value_3) {
     fra.me.REG[0] = BOX_NativeString("}\n");
     REGB0 = TAG_Int(2);
@@ -308,7 +330,7 @@ val_t metamodel___partial_order___PartialOrder___to_dot(val_t p0){
   } else fra.me.REG[0] = once_value_3;
   fra.me.REG[0] = fra.me.REG[0];
   CALL_standard___collection___abstract_collection___Sequence___append(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[0]);
-  /* ./metamodel//partial_order.nit:76 */
+  /* metamodel/partial_order.nit:76 */
   fra.me.REG[1] = CALL_standard___string___Object___to_s(fra.me.REG[1])(fra.me.REG[1]);
   goto label4;
   label4: while(0);
@@ -319,6 +341,7 @@ val_t metamodel___partial_order___PartialOrder___to_dot(val_t p0){
     struct {struct stack_frame_t me; val_t MORE_REG[4];} fra;
     val_t REGB0;
     val_t REGB1;
+    val_t REGB2;
     fun_t CREG[1];
     val_t tmp;
     fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
@@ -327,6 +350,7 @@ val_t metamodel___partial_order___PartialOrder___to_dot(val_t p0){
     fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___to_dot;
     fra.me.has_broke = 0;
     fra.me.REG_size = 5;
+    fra.me.nitni_local_ref_head = NULL;
     fra.me.REG[0] = NIT_NULL;
     fra.me.REG[1] = NIT_NULL;
     fra.me.REG[2] = NIT_NULL;
@@ -336,55 +360,60 @@ val_t metamodel___partial_order___PartialOrder___to_dot(val_t p0){
     fra.me.closure_funs = CREG;
     fra.me.REG[0] = p0;
     CREG[0] = clos_fun0;
-    /* ./metamodel//partial_order.nit:70 */
+    /* metamodel/partial_order.nit:70 */
     fra.me.REG[1] = CALL_metamodel___partial_order___PartialOrderElement___value(fra.me.REG[0])(fra.me.REG[0]);
     fra.me.REG[1] = CALL_metamodel___partial_order___PartialOrder___to_dot_node(closctx->REG[0])(closctx->REG[0], fra.me.REG[1]);
     CALL_standard___collection___abstract_collection___Sequence___append(closctx->REG[1])(closctx->REG[1], fra.me.REG[1]);
-    /* ./metamodel//partial_order.nit:71 */
+    /* metamodel/partial_order.nit:71 */
     fra.me.REG[1] = CALL_metamodel___partial_order___PartialOrderElement___direct_greaters(fra.me.REG[0])(fra.me.REG[0]);
-    /* ./../lib/standard//collection//array.nit:234 */
+    /* ../lib/standard/collection/array.nit:269 */
     REGB0 = TAG_Int(0);
-    /* ./../lib/standard//collection//array.nit:235 */
+    /* ../lib/standard/collection/array.nit:270 */
     REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 235);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 270);
     }
     REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1]);
-    /* ./../lib/standard//collection//array.nit:236 */
+    /* ../lib/standard/collection/array.nit:271 */
     fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[1]);
-    /* ./../lib/standard//collection//array.nit:237 */
+    /* ../lib/standard/collection/array.nit:272 */
     while(1) {
-      /* ./../lib/standard//collection//array.nit:23 */
+      /* ../lib/standard/collection/array.nit:24 */
       REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
       } else {
-        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
       }
       REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1]);
-      /* ./../lib/standard//kernel.nit:215 */
+      REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:235 */
       REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-      /* ./../lib/standard//collection//array.nit:237 */
+      /* ../lib/standard/collection/array.nit:272 */
       if (UNTAG_Bool(REGB1)) {
-        /* ./../lib/standard//collection//array.nit:238 */
+        /* ../lib/standard/collection/array.nit:273 */
         REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
         if (UNTAG_Bool(REGB1)) {
-          nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 238);
+          nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
         }
-        /* ./../lib/standard//collection//array.nit:654 */
+        /* ../lib/standard/collection/array.nit:724 */
         fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
-        /* ./metamodel//partial_order.nit:72 */
+        /* metamodel/partial_order.nit:72 */
         fra.me.REG[4] = CALL_metamodel___partial_order___PartialOrderElement___value(fra.me.REG[0])(fra.me.REG[0]);
         fra.me.REG[3] = CALL_metamodel___partial_order___PartialOrder___to_dot_edge(closctx->REG[0])(closctx->REG[0], fra.me.REG[4], fra.me.REG[3]);
         CALL_standard___collection___abstract_collection___Sequence___append(closctx->REG[1])(closctx->REG[1], fra.me.REG[3]);
-        /* ./../lib/standard//collection//array.nit:239 */
+        /* ../lib/standard/collection/array.nit:274 */
         REGB1 = TAG_Int(1);
-        /* ./../lib/standard//kernel.nit:218 */
+        /* ../lib/standard/kernel.nit:238 */
         REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-        /* ./../lib/standard//collection//array.nit:239 */
+        /* ../lib/standard/collection/array.nit:274 */
         REGB0 = REGB1;
       } else {
-        /* ./../lib/standard//collection//array.nit:237 */
+        /* ../lib/standard/collection/array.nit:272 */
         goto label2;
       }
     }
@@ -392,6 +421,7 @@ val_t metamodel___partial_order___PartialOrder___to_dot(val_t p0){
     stack_frame_head = fra.me.prev;
     return;
   }
+static const char LOCATE_metamodel___partial_order___PartialOrder___to_dot_header[] = "partial_order::PartialOrder::to_dot_header";
 val_t metamodel___partial_order___PartialOrder___to_dot_header(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -403,9 +433,10 @@ val_t metamodel___partial_order___PartialOrder___to_dot_header(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___to_dot_header;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:82 */
+  /* metamodel/partial_order.nit:82 */
   if (!once_value_1) {
     fra.me.REG[0] = BOX_NativeString("digraph G {\ngraph [rankdir=BT];\n");
     REGB0 = TAG_Int(32);
@@ -419,6 +450,7 @@ val_t metamodel___partial_order___PartialOrder___to_dot_header(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___to_dot_node[] = "partial_order::PartialOrder::to_dot_node";
 val_t metamodel___partial_order___PartialOrder___to_dot_node(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -431,12 +463,13 @@ val_t metamodel___partial_order___PartialOrder___to_dot_node(val_t p0, val_t p1)
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___to_dot_node;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:88 */
+  /* metamodel/partial_order.nit:88 */
   REGB0 = TAG_Int(3);
   fra.me.REG[0] = NEW_Array_standard___collection___array___Array___with_capacity(REGB0);
   if (!once_value_1) {
@@ -465,6 +498,7 @@ val_t metamodel___partial_order___PartialOrder___to_dot_node(val_t p0, val_t p1)
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___to_dot_edge[] = "partial_order::PartialOrder::to_dot_edge";
 val_t metamodel___partial_order___PartialOrder___to_dot_edge(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
   val_t REGB0;
@@ -478,6 +512,7 @@ val_t metamodel___partial_order___PartialOrder___to_dot_edge(val_t p0, val_t p1,
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___to_dot_edge;
   fra.me.has_broke = 0;
   fra.me.REG_size = 4;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
@@ -485,7 +520,7 @@ val_t metamodel___partial_order___PartialOrder___to_dot_edge(val_t p0, val_t p1,
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
-  /* ./metamodel//partial_order.nit:94 */
+  /* metamodel/partial_order.nit:94 */
   REGB0 = TAG_Int(5);
   fra.me.REG[0] = NEW_Array_standard___collection___array___Array___with_capacity(REGB0);
   if (!once_value_1) {
@@ -525,6 +560,7 @@ val_t metamodel___partial_order___PartialOrder___to_dot_edge(val_t p0, val_t p1,
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___select_smallests[] = "partial_order::PartialOrder::select_smallests";
 val_t metamodel___partial_order___PartialOrder___select_smallests(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[4];} fra;
   val_t REGB0;
@@ -536,6 +572,7 @@ val_t metamodel___partial_order___PartialOrder___select_smallests(val_t p0, val_
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___select_smallests;
   fra.me.has_broke = 0;
   fra.me.REG_size = 5;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
@@ -543,13 +580,13 @@ val_t metamodel___partial_order___PartialOrder___select_smallests(val_t p0, val_
   fra.me.REG[4] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:100 */
+  /* metamodel/partial_order.nit:100 */
   REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
-      REGB1 = TAG_Bool(false);
+      REGB1 = TAG_Bool(0);
       REGB0 = REGB1;
     } else {
       REGB1 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
@@ -560,33 +597,33 @@ val_t metamodel___partial_order___PartialOrder___select_smallests(val_t p0, val_
     fra.me.REG[2] = NEW_Array_standard___collection___array___Array___init();
     goto label1;
   }
-  /* ./metamodel//partial_order.nit:101 */
+  /* metamodel/partial_order.nit:101 */
   REGB0 = CALL_metamodel___partial_order___PartialOrder___has_all(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Assert failed", NULL, LOCATE_metamodel___partial_order, 101);
   }
-  /* ./metamodel//partial_order.nit:102 */
+  /* metamodel/partial_order.nit:102 */
   REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
     nit_abort("Reciever is null", NULL, LOCATE_metamodel___partial_order, 102);
   }
   REGB0 = CALL_standard___collection___abstract_collection___Collection___length(fra.me.REG[1])(fra.me.REG[1]);
   fra.me.REG[3] = NEW_Array_standard___collection___array___Array___with_capacity(REGB0);
-  /* ./metamodel//partial_order.nit:103 */
+  /* metamodel/partial_order.nit:103 */
   REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
     nit_abort("Reciever is null", NULL, LOCATE_metamodel___partial_order, 103);
   }
   REGB0 = CALL_standard___collection___abstract_collection___Collection___length(fra.me.REG[1])(fra.me.REG[1]);
   fra.me.REG[4] = NEW_Array_standard___collection___array___Array___with_capacity(REGB0);
-  /* ./metamodel//partial_order.nit:104 */
+  /* metamodel/partial_order.nit:104 */
   REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
     nit_abort("Reciever is null", NULL, LOCATE_metamodel___partial_order, 104);
   }
   CALL_standard___collection___abstract_collection___Collection___iterate(fra.me.REG[1])(fra.me.REG[1], (&(fra.me)), ((fun_t)OC_metamodel___partial_order___PartialOrder___select_smallests_2));
-  /* ./metamodel//partial_order.nit:115 */
+  /* metamodel/partial_order.nit:115 */
   fra.me.REG[2] = fra.me.REG[3];
   goto label1;
   label1: while(0);
@@ -604,25 +641,27 @@ val_t metamodel___partial_order___PartialOrder___select_smallests(val_t p0, val_
     fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___select_smallests;
     fra.me.has_broke = 0;
     fra.me.REG_size = 1;
+    fra.me.nitni_local_ref_head = NULL;
     fra.me.REG[0] = NIT_NULL;
     fra.me.closure_ctx = closctx_param;
     fra.me.closure_funs = CREG;
     fra.me.REG[0] = p0;
     CREG[0] = clos_fun0;
-    /* ./metamodel//partial_order.nit:106 */
+    /* metamodel/partial_order.nit:106 */
     REGB0 = CALL_metamodel___partial_order___PartialOrder___add_to_smallests(closctx->REG[0])(closctx->REG[0], fra.me.REG[0], closctx->REG[3], closctx->REG[4]);
-    /* ./metamodel//partial_order.nit:107 */
+    /* metamodel/partial_order.nit:107 */
     if (UNTAG_Bool(REGB0)) {
-      /* ./metamodel//partial_order.nit:110 */
+      /* metamodel/partial_order.nit:110 */
       fra.me.REG[0] = closctx->REG[4];
-      /* ./metamodel//partial_order.nit:111 */
+      /* metamodel/partial_order.nit:111 */
       closctx->REG[4] = closctx->REG[3];
-      /* ./metamodel//partial_order.nit:112 */
+      /* metamodel/partial_order.nit:112 */
       closctx->REG[3] = fra.me.REG[0];
     }
     stack_frame_head = fra.me.prev;
     return;
   }
+static const char LOCATE_metamodel___partial_order___PartialOrder___add[] = "partial_order::PartialOrder::add";
 val_t metamodel___partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[4];} fra;
   val_t REGB0;
@@ -634,6 +673,7 @@ val_t metamodel___partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___add;
   fra.me.has_broke = 0;
   fra.me.REG_size = 5;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
@@ -642,20 +682,20 @@ val_t metamodel___partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
-  /* ./metamodel//partial_order.nit:121 */
+  /* metamodel/partial_order.nit:121 */
   REGB0 = CALL_standard___collection___abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
   REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Assert failed", NULL, LOCATE_metamodel___partial_order, 121);
   }
-  /* ./metamodel//partial_order.nit:122 */
+  /* metamodel/partial_order.nit:122 */
   REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
-      REGB1 = TAG_Bool(false);
+      REGB1 = TAG_Bool(0);
       REGB0 = REGB1;
     } else {
       REGB1 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], NIT_NULL);
@@ -663,7 +703,7 @@ val_t metamodel___partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p
     }
   }
   if (UNTAG_Bool(REGB0)) {
-    REGB0 = TAG_Bool(true);
+    REGB0 = TAG_Bool(1);
   } else {
     REGB1 = CALL_metamodel___partial_order___PartialOrder___has_all(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
     REGB0 = REGB1;
@@ -672,11 +712,11 @@ val_t metamodel___partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p
   } else {
     nit_abort("Assert failed", NULL, LOCATE_metamodel___partial_order, 122);
   }
-  /* ./metamodel//partial_order.nit:123 */
+  /* metamodel/partial_order.nit:123 */
   fra.me.REG[3] = CALL_metamodel___partial_order___PartialOrder___select_smallests(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
-  /* ./metamodel//partial_order.nit:124 */
+  /* metamodel/partial_order.nit:124 */
   fra.me.REG[3] = CALL_metamodel___partial_order___PartialOrder___new_poe(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], fra.me.REG[3]);
-  /* ./metamodel//partial_order.nit:125 */
+  /* metamodel/partial_order.nit:125 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -684,7 +724,7 @@ val_t metamodel___partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p
   }
   fra.me.REG[4] = ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0]);
   CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[1], fra.me.REG[3]);
-  /* ./metamodel//partial_order.nit:126 */
+  /* metamodel/partial_order.nit:126 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements_list(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -692,13 +732,13 @@ val_t metamodel___partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p
   }
   fra.me.REG[4] = ATTR_metamodel___partial_order___PartialOrder____elements_list(fra.me.REG[0]);
   CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[1]);
-  /* ./metamodel//partial_order.nit:127 */
+  /* metamodel/partial_order.nit:127 */
   REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
-      REGB1 = TAG_Bool(false);
+      REGB1 = TAG_Bool(0);
       REGB0 = REGB1;
     } else {
       REGB1 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], NIT_NULL);
@@ -706,7 +746,7 @@ val_t metamodel___partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p
     }
   }
   if (UNTAG_Bool(REGB0)) {
-    REGB0 = TAG_Bool(true);
+    REGB0 = TAG_Bool(1);
   } else {
     REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
@@ -716,7 +756,7 @@ val_t metamodel___partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p
     REGB0 = REGB1;
   }
   if (UNTAG_Bool(REGB0)) {
-    /* ./metamodel//partial_order.nit:128 */
+    /* metamodel/partial_order.nit:128 */
     REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____roots(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
     } else {
@@ -725,12 +765,13 @@ val_t metamodel___partial_order___PartialOrder___add(val_t p0, val_t p1, val_t p
     fra.me.REG[0] = ATTR_metamodel___partial_order___PartialOrder____roots(fra.me.REG[0]);
     CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
   }
-  /* ./metamodel//partial_order.nit:130 */
+  /* metamodel/partial_order.nit:130 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[3];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___has_all[] = "partial_order::PartialOrder::has_all";
 val_t metamodel___partial_order___PartialOrder___has_all(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -741,6 +782,7 @@ val_t metamodel___partial_order___PartialOrder___has_all(val_t p0, val_t p1){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___has_all;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
@@ -750,8 +792,8 @@ val_t metamodel___partial_order___PartialOrder___has_all(val_t p0, val_t p1){
     case 0: break;
     case 1: (&(fra.me))->has_broke = 0; goto label3;
   }
-  /* ./metamodel//partial_order.nit:141 */
-  REGB0 = TAG_Bool(true);
+  /* metamodel/partial_order.nit:141 */
+  REGB0 = TAG_Bool(1);
   fra.me.REG[1] = REGB0;
   goto label3;
   label3: while(0);
@@ -763,24 +805,25 @@ val_t metamodel___partial_order___PartialOrder___has_all(val_t p0, val_t p1){
     val_t REGB0;
     fun_t CREG[1];
     val_t tmp;
-    /* ./metamodel//partial_order.nit:136 */
+    /* metamodel/partial_order.nit:136 */
     fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
     fra.me.file = LOCATE_metamodel___partial_order;
     fra.me.line = 0;
     fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___has_all;
     fra.me.has_broke = 0;
     fra.me.REG_size = 1;
+    fra.me.nitni_local_ref_head = NULL;
     fra.me.REG[0] = NIT_NULL;
     fra.me.closure_ctx = closctx_param;
     fra.me.closure_funs = CREG;
     fra.me.REG[0] = p0;
     CREG[0] = clos_fun0;
-    /* ./metamodel//partial_order.nit:137 */
+    /* metamodel/partial_order.nit:137 */
     REGB0 = CALL_standard___collection___abstract_collection___Collection___has(closctx->REG[0])(closctx->REG[0], fra.me.REG[0]);
     REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
     if (UNTAG_Bool(REGB0)) {
-      /* ./metamodel//partial_order.nit:138 */
-      REGB0 = TAG_Bool(false);
+      /* metamodel/partial_order.nit:138 */
+      REGB0 = TAG_Bool(0);
       closctx->REG[1] = REGB0;
       closctx->has_broke = 1;
       goto label2;
@@ -789,6 +832,7 @@ val_t metamodel___partial_order___PartialOrder___has_all(val_t p0, val_t p1){
     stack_frame_head = fra.me.prev;
     return;
   }
+static const char LOCATE_metamodel___partial_order___PartialOrder___new_poe[] = "partial_order::PartialOrder::new_poe";
 val_t metamodel___partial_order___PartialOrder___new_poe(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t tmp;
@@ -798,19 +842,21 @@ val_t metamodel___partial_order___PartialOrder___new_poe(val_t p0, val_t p1, val
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___new_poe;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
-  /* ./metamodel//partial_order.nit:147 */
+  /* metamodel/partial_order.nit:147 */
   fra.me.REG[2] = NEW_PartialOrderElement_metamodel___partial_order___PartialOrderElement___init(fra.me.REG[0], fra.me.REG[1], fra.me.REG[2]);
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[2];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___add_to_smallests[] = "partial_order::PartialOrder::add_to_smallests";
 val_t metamodel___partial_order___PartialOrder___add_to_smallests(val_t p0, val_t p1, val_t p2, val_t p3){
   struct {struct stack_frame_t me; val_t MORE_REG[5];} fra;
   val_t REGB0;
@@ -823,6 +869,7 @@ val_t metamodel___partial_order___PartialOrder___add_to_smallests(val_t p0, val_
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___add_to_smallests;
   fra.me.has_broke = 0;
   fra.me.REG_size = 6;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
@@ -833,77 +880,83 @@ val_t metamodel___partial_order___PartialOrder___add_to_smallests(val_t p0, val_
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
   fra.me.REG[3] = p3;
-  /* ./metamodel//partial_order.nit:157 */
+  /* metamodel/partial_order.nit:157 */
   CALL_standard___collection___abstract_collection___RemovableCollection___clear(fra.me.REG[3])(fra.me.REG[3]);
-  /* ./metamodel//partial_order.nit:158 */
+  /* metamodel/partial_order.nit:158 */
   fra.me.REG[0] = CALL_metamodel___partial_order___PartialOrder_____bra(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
-  /* ./../lib/standard//collection//array.nit:234 */
+  /* ../lib/standard/collection/array.nit:269 */
   REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:235 */
+  /* ../lib/standard/collection/array.nit:270 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 235);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 270);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-  /* ./../lib/standard//collection//array.nit:236 */
+  /* ../lib/standard/collection/array.nit:271 */
   fra.me.REG[4] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
-  /* ./../lib/standard//collection//array.nit:237 */
+  /* ../lib/standard/collection/array.nit:272 */
   while(1) {
-    /* ./../lib/standard//collection//array.nit:23 */
+    /* ../lib/standard/collection/array.nit:24 */
     REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
     }
     REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:237 */
+    /* ../lib/standard/collection/array.nit:272 */
     if (UNTAG_Bool(REGB1)) {
-      /* ./../lib/standard//collection//array.nit:238 */
+      /* ../lib/standard/collection/array.nit:273 */
       REGB1 = TAG_Bool(fra.me.REG[4]==NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 238);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
       }
-      /* ./../lib/standard//collection//array.nit:654 */
+      /* ../lib/standard/collection/array.nit:724 */
       fra.me.REG[5] = ((Nit_NativeArray)fra.me.REG[4])->val[UNTAG_Int(REGB0)];
-      /* ./metamodel//partial_order.nit:160 */
+      /* metamodel/partial_order.nit:160 */
       REGB1 = CALL_metamodel___partial_order___PartialOrderElement_____g(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[5]);
       if (UNTAG_Bool(REGB1)) {
-        /* ./metamodel//partial_order.nit:161 */
-        REGB1 = TAG_Bool(false);
+        /* metamodel/partial_order.nit:161 */
+        REGB1 = TAG_Bool(0);
         goto label1;
       }
-      /* ./metamodel//partial_order.nit:163 */
+      /* metamodel/partial_order.nit:163 */
       REGB2 = CALL_metamodel___partial_order___PartialOrderElement_____l(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[5]);
       REGB2 = TAG_Bool(!UNTAG_Bool(REGB2));
       if (UNTAG_Bool(REGB2)) {
-        /* ./metamodel//partial_order.nit:164 */
+        /* metamodel/partial_order.nit:164 */
         CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[5]);
       }
-      /* ./../lib/standard//collection//array.nit:239 */
+      /* ../lib/standard/collection/array.nit:274 */
       REGB2 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:239 */
+      /* ../lib/standard/collection/array.nit:274 */
       REGB0 = REGB2;
     } else {
-      /* ./../lib/standard//collection//array.nit:237 */
+      /* ../lib/standard/collection/array.nit:272 */
       goto label2;
     }
   }
   label2: while(0);
-  /* ./metamodel//partial_order.nit:167 */
+  /* metamodel/partial_order.nit:167 */
   CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[1]);
-  /* ./metamodel//partial_order.nit:168 */
-  REGB0 = TAG_Bool(true);
+  /* metamodel/partial_order.nit:168 */
+  REGB0 = TAG_Bool(1);
   REGB1 = REGB0;
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB1;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrder___compute_smallers_for[] = "partial_order::PartialOrder::compute_smallers_for";
 void metamodel___partial_order___PartialOrder___compute_smallers_for(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -914,21 +967,23 @@ void metamodel___partial_order___PartialOrder___compute_smallers_for(val_t p0, v
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___compute_smallers_for;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
-  /* ./metamodel//partial_order.nit:173 */
+  /* metamodel/partial_order.nit:173 */
   fra.me.REG[1] = CALL_metamodel___partial_order___PartialOrderElement___value(fra.me.REG[1])(fra.me.REG[1]);
-  /* ./metamodel//partial_order.nit:174 */
+  /* metamodel/partial_order.nit:174 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Uninitialized attribute %s", "_elements", LOCATE_metamodel___partial_order, 174);
   }
   fra.me.REG[0] = ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_standard___collection___abstract_collection___MapRead___values(fra.me.REG[0])(fra.me.REG[0]);
   CALL_standard___collection___abstract_collection___Collection___iterate(fra.me.REG[0])(fra.me.REG[0], (&(fra.me)), ((fun_t)OC_metamodel___partial_order___PartialOrder___compute_smallers_for_1));
   stack_frame_head = fra.me.prev;
   return;
@@ -944,21 +999,23 @@ void metamodel___partial_order___PartialOrder___compute_smallers_for(val_t p0, v
     fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___compute_smallers_for;
     fra.me.has_broke = 0;
     fra.me.REG_size = 1;
+    fra.me.nitni_local_ref_head = NULL;
     fra.me.REG[0] = NIT_NULL;
     fra.me.closure_ctx = closctx_param;
     fra.me.closure_funs = CREG;
     fra.me.REG[0] = p0;
     CREG[0] = clos_fun0;
-    /* ./metamodel//partial_order.nit:175 */
+    /* metamodel/partial_order.nit:175 */
     REGB0 = CALL_metamodel___partial_order___PartialOrderElement_____l(fra.me.REG[0])(fra.me.REG[0], closctx->REG[1]);
     if (UNTAG_Bool(REGB0)) {
-      /* ./metamodel//partial_order.nit:176 */
+      /* metamodel/partial_order.nit:176 */
       fra.me.REG[0] = CALL_metamodel___partial_order___PartialOrderElement___value(fra.me.REG[0])(fra.me.REG[0]);
       CALL_standard___collection___abstract_collection___SimpleCollection___add(closctx->REG[2])(closctx->REG[2], fra.me.REG[0]);
     }
     stack_frame_head = fra.me.prev;
     return;
   }
+static const char LOCATE_metamodel___partial_order___PartialOrder___init[] = "partial_order::PartialOrder::init";
 void metamodel___partial_order___PartialOrder___init(val_t p0, int* init_table){
   int itpos0 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_metamodel___partial_order___PartialOrder].i;
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
@@ -970,22 +1027,24 @@ void metamodel___partial_order___PartialOrder___init(val_t p0, int* init_table){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrder___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:183 */
+  /* metamodel/partial_order.nit:183 */
   fra.me.REG[1] = NEW_HashMap_standard___collection___hash_collection___HashMap___init();
   ATTR_metamodel___partial_order___PartialOrder____elements(fra.me.REG[0]) = fra.me.REG[1];
-  /* ./metamodel//partial_order.nit:184 */
+  /* metamodel/partial_order.nit:184 */
   fra.me.REG[1] = NEW_Array_standard___collection___array___Array___init();
   ATTR_metamodel___partial_order___PartialOrder____elements_list(fra.me.REG[0]) = fra.me.REG[1];
-  /* ./metamodel//partial_order.nit:185 */
+  /* metamodel/partial_order.nit:185 */
   fra.me.REG[1] = NEW_Array_standard___collection___array___Array___init();
   ATTR_metamodel___partial_order___PartialOrder____roots(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   init_table[itpos0] = 1;
   return;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___order[] = "partial_order::PartialOrderElement::order";
 val_t metamodel___partial_order___PartialOrderElement___order(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -996,9 +1055,10 @@ val_t metamodel___partial_order___PartialOrderElement___order(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___order;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:190 */
+  /* metamodel/partial_order.nit:190 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1008,6 +1068,7 @@ val_t metamodel___partial_order___PartialOrderElement___order(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___value[] = "partial_order::PartialOrderElement::value";
 val_t metamodel___partial_order___PartialOrderElement___value(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -1018,9 +1079,10 @@ val_t metamodel___partial_order___PartialOrderElement___value(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___value;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:193 */
+  /* metamodel/partial_order.nit:193 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____value(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1030,6 +1092,7 @@ val_t metamodel___partial_order___PartialOrderElement___value(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___rank[] = "partial_order::PartialOrderElement::rank";
 val_t metamodel___partial_order___PartialOrderElement___rank(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -1040,9 +1103,10 @@ val_t metamodel___partial_order___PartialOrderElement___rank(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___rank;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:196 */
+  /* metamodel/partial_order.nit:196 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____rank(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1052,6 +1116,7 @@ val_t metamodel___partial_order___PartialOrderElement___rank(val_t p0){
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___direct_greaters[] = "partial_order::PartialOrderElement::direct_greaters";
 val_t metamodel___partial_order___PartialOrderElement___direct_greaters(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -1062,9 +1127,10 @@ val_t metamodel___partial_order___PartialOrderElement___direct_greaters(val_t p0
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___direct_greaters;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:202 */
+  /* metamodel/partial_order.nit:202 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____direct_greaters(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1074,6 +1140,7 @@ val_t metamodel___partial_order___PartialOrderElement___direct_greaters(val_t p0
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___direct_smallers[] = "partial_order::PartialOrderElement::direct_smallers";
 val_t metamodel___partial_order___PartialOrderElement___direct_smallers(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -1084,9 +1151,10 @@ val_t metamodel___partial_order___PartialOrderElement___direct_smallers(val_t p0
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___direct_smallers;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:205 */
+  /* metamodel/partial_order.nit:205 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____direct_smallers(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1096,6 +1164,7 @@ val_t metamodel___partial_order___PartialOrderElement___direct_smallers(val_t p0
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___greaters[] = "partial_order::PartialOrderElement::greaters";
 val_t metamodel___partial_order___PartialOrderElement___greaters(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -1106,9 +1175,10 @@ val_t metamodel___partial_order___PartialOrderElement___greaters(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___greaters;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:208 */
+  /* metamodel/partial_order.nit:208 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____greaters(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1118,8 +1188,9 @@ val_t metamodel___partial_order___PartialOrderElement___greaters(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___greaters_and_self[] = "partial_order::PartialOrderElement::greaters_and_self";
 val_t metamodel___partial_order___PartialOrderElement___greaters_and_self(val_t p0){
-  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
   val_t REGB0;
   val_t REGB1;
   val_t tmp;
@@ -1128,52 +1199,56 @@ val_t metamodel___partial_order___PartialOrderElement___greaters_and_self(val_t
   fra.me.line = 214;
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___greaters_and_self;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 3;
+  fra.me.REG_size = 4;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:217 */
-  fra.me.REG[1] = ATTR_metamodel___partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[0]);
-  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  /* metamodel/partial_order.nit:214 */
+  fra.me.REG[1] = fra.me.REG[0];
+  /* metamodel/partial_order.nit:217 */
+  fra.me.REG[2] = ATTR_metamodel___partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[1]);
+  REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
-      REGB1 = TAG_Bool(false);
+      REGB1 = TAG_Bool(0);
       REGB0 = REGB1;
     } else {
-      REGB1 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
+      REGB1 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], NIT_NULL);
       REGB0 = REGB1;
     }
   }
   if (UNTAG_Bool(REGB0)) {
-    /* ./metamodel//partial_order.nit:218 */
-    REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____greaters(fra.me.REG[0])!=NIT_NULL);
+    /* metamodel/partial_order.nit:218 */
+    REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____greaters(fra.me.REG[1])!=NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
     } else {
       nit_abort("Uninitialized attribute %s", "_greaters", LOCATE_metamodel___partial_order, 218);
     }
-    fra.me.REG[1] = ATTR_metamodel___partial_order___PartialOrderElement____greaters(fra.me.REG[0]);
-    fra.me.REG[1] = CALL_standard___collection___array___Collection___to_a(fra.me.REG[1])(fra.me.REG[1]);
-    ATTR_metamodel___partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[0]) = fra.me.REG[1];
-    /* ./metamodel//partial_order.nit:219 */
-    fra.me.REG[1] = ATTR_metamodel___partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[0]);
-    REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____value(fra.me.REG[0])!=NIT_NULL);
+    fra.me.REG[2] = ATTR_metamodel___partial_order___PartialOrderElement____greaters(fra.me.REG[1]);
+    fra.me.REG[2] = CALL_standard___collection___array___Collection___to_a(fra.me.REG[2])(fra.me.REG[2]);
+    ATTR_metamodel___partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[1]) = fra.me.REG[2];
+    /* metamodel/partial_order.nit:219 */
+    fra.me.REG[2] = ATTR_metamodel___partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[1]);
+    REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____value(fra.me.REG[1])!=NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
     } else {
       nit_abort("Uninitialized attribute %s", "_value", LOCATE_metamodel___partial_order, 219);
     }
-    fra.me.REG[2] = ATTR_metamodel___partial_order___PartialOrderElement____value(fra.me.REG[0]);
-    REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    fra.me.REG[3] = ATTR_metamodel___partial_order___PartialOrderElement____value(fra.me.REG[1]);
+    REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
       nit_abort("Reciever is null", NULL, LOCATE_metamodel___partial_order, 219);
     }
-    CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
+    CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[3]);
   }
-  /* ./metamodel//partial_order.nit:221 */
-  fra.me.REG[0] = ATTR_metamodel___partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[0]);
-  REGB0 = TAG_Bool(fra.me.REG[0]!=NIT_NULL);
+  /* metamodel/partial_order.nit:221 */
+  fra.me.REG[1] = ATTR_metamodel___partial_order___PartialOrderElement____greaters_and_self_cache(fra.me.REG[1]);
+  REGB0 = TAG_Bool(fra.me.REG[1]!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Cast failed", NULL, LOCATE_metamodel___partial_order, 221);
@@ -1181,12 +1256,14 @@ val_t metamodel___partial_order___PartialOrderElement___greaters_and_self(val_t
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
-  return fra.me.REG[0];
+  return fra.me.REG[1];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___smallers[] = "partial_order::PartialOrderElement::smallers";
 val_t metamodel___partial_order___PartialOrderElement___smallers(val_t p0){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_metamodel___partial_order;
@@ -1194,11 +1271,12 @@ val_t metamodel___partial_order___PartialOrderElement___smallers(val_t p0){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___smallers;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:233 */
+  /* metamodel/partial_order.nit:233 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____smallers_last_length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1212,11 +1290,16 @@ val_t metamodel___partial_order___PartialOrderElement___smallers(val_t p0){
   }
   fra.me.REG[1] = ATTR_metamodel___partial_order___PartialOrderElement____order(fra.me.REG[0]);
   REGB1 = CALL_standard___collection___abstract_collection___Collection___length(fra.me.REG[1])(fra.me.REG[1]);
-  /* ./../lib/standard//kernel.nit:215 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:235 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-  /* ./metamodel//partial_order.nit:233 */
+  /* metamodel/partial_order.nit:233 */
   if (UNTAG_Bool(REGB1)) {
-    /* ./metamodel//partial_order.nit:234 */
+    /* metamodel/partial_order.nit:234 */
     REGB1 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
@@ -1230,7 +1313,7 @@ val_t metamodel___partial_order___PartialOrderElement___smallers(val_t p0){
     }
     fra.me.REG[2] = ATTR_metamodel___partial_order___PartialOrderElement____smallers_cache(fra.me.REG[0]);
     CALL_metamodel___partial_order___PartialOrder___compute_smallers_for(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[0], fra.me.REG[2]);
-    /* ./metamodel//partial_order.nit:235 */
+    /* metamodel/partial_order.nit:235 */
     REGB1 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
@@ -1240,7 +1323,7 @@ val_t metamodel___partial_order___PartialOrderElement___smallers(val_t p0){
     REGB1 = CALL_standard___collection___abstract_collection___Collection___length(fra.me.REG[2])(fra.me.REG[2]);
     ATTR_metamodel___partial_order___PartialOrderElement____smallers_last_length(fra.me.REG[0]) = REGB1;
   }
-  /* ./metamodel//partial_order.nit:237 */
+  /* metamodel/partial_order.nit:237 */
   REGB1 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____smallers_cache(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
@@ -1252,18 +1335,21 @@ val_t metamodel___partial_order___PartialOrderElement___smallers(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___linear_extension[] = "partial_order::PartialOrderElement::linear_extension";
 val_t metamodel___partial_order___PartialOrderElement___linear_extension(val_t p0){
-  struct {struct stack_frame_t me; val_t MORE_REG[8];} fra;
+  struct {struct stack_frame_t me; val_t MORE_REG[9];} fra;
   val_t REGB0;
   val_t REGB1;
   val_t REGB2;
+  val_t REGB3;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_metamodel___partial_order;
   fra.me.line = 243;
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___linear_extension;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 9;
+  fra.me.REG_size = 10;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
@@ -1273,145 +1359,158 @@ val_t metamodel___partial_order___PartialOrderElement___linear_extension(val_t p
   fra.me.REG[6] = NIT_NULL;
   fra.me.REG[7] = NIT_NULL;
   fra.me.REG[8] = NIT_NULL;
+  fra.me.REG[9] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:247 */
-  fra.me.REG[1] = ATTR_metamodel___partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[0]);
-  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  /* metamodel/partial_order.nit:243 */
+  fra.me.REG[1] = fra.me.REG[0];
+  /* metamodel/partial_order.nit:247 */
+  fra.me.REG[2] = ATTR_metamodel___partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[1]);
+  REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
-      REGB1 = TAG_Bool(false);
+      REGB1 = TAG_Bool(0);
       REGB0 = REGB1;
     } else {
-      REGB1 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
+      REGB1 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], NIT_NULL);
       REGB0 = REGB1;
     }
   }
   if (UNTAG_Bool(REGB0)) {
-    /* ./metamodel//partial_order.nit:248 */
-    fra.me.REG[1] = NEW_Array_standard___collection___array___Array___init();
-    /* ./metamodel//partial_order.nit:249 */
+    /* metamodel/partial_order.nit:248 */
     fra.me.REG[2] = NEW_Array_standard___collection___array___Array___init();
-    /* ./metamodel//partial_order.nit:250 */
-    fra.me.REG[3] = CALL_metamodel___partial_order___PartialOrderElement___value(fra.me.REG[0])(fra.me.REG[0]);
-    CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[3]);
-    /* ./metamodel//partial_order.nit:251 */
-    fra.me.REG[3] = CALL_metamodel___partial_order___PartialOrderElement___direct_greaters(fra.me.REG[0])(fra.me.REG[0]);
-    /* ./../lib/standard//collection//array.nit:234 */
+    /* metamodel/partial_order.nit:249 */
+    fra.me.REG[3] = NEW_Array_standard___collection___array___Array___init();
+    /* metamodel/partial_order.nit:250 */
+    fra.me.REG[4] = CALL_metamodel___partial_order___PartialOrderElement___value(fra.me.REG[1])(fra.me.REG[1]);
+    CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[4]);
+    /* metamodel/partial_order.nit:251 */
+    fra.me.REG[4] = CALL_metamodel___partial_order___PartialOrderElement___direct_greaters(fra.me.REG[1])(fra.me.REG[1]);
+    /* ../lib/standard/collection/array.nit:269 */
     REGB0 = TAG_Int(0);
-    /* ./../lib/standard//collection//array.nit:235 */
-    REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
+    /* ../lib/standard/collection/array.nit:270 */
+    REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[4])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 235);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 270);
     }
-    REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3]);
-    /* ./../lib/standard//collection//array.nit:236 */
-    fra.me.REG[4] = ATTR_standard___collection___array___Array____items(fra.me.REG[3]);
-    /* ./../lib/standard//collection//array.nit:237 */
+    REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[4]);
+    /* ../lib/standard/collection/array.nit:271 */
+    fra.me.REG[5] = ATTR_standard___collection___array___Array____items(fra.me.REG[4]);
+    /* ../lib/standard/collection/array.nit:272 */
     while(1) {
-      /* ./../lib/standard//collection//array.nit:23 */
-      REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
+      /* ../lib/standard/collection/array.nit:24 */
+      REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[4])!=NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
       } else {
-        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
       }
-      REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3]);
-      /* ./../lib/standard//kernel.nit:215 */
+      REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[4]);
+      REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:235 */
       REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-      /* ./../lib/standard//collection//array.nit:237 */
+      /* ../lib/standard/collection/array.nit:272 */
       if (UNTAG_Bool(REGB1)) {
-        /* ./../lib/standard//collection//array.nit:238 */
-        REGB1 = TAG_Bool(fra.me.REG[4]==NIT_NULL);
+        /* ../lib/standard/collection/array.nit:273 */
+        REGB1 = TAG_Bool(fra.me.REG[5]==NIT_NULL);
         if (UNTAG_Bool(REGB1)) {
-          nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 238);
+          nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
         }
-        /* ./../lib/standard//collection//array.nit:654 */
-        fra.me.REG[5] = ((Nit_NativeArray)fra.me.REG[4])->val[UNTAG_Int(REGB0)];
-        /* ./metamodel//partial_order.nit:252 */
-        fra.me.REG[6] = CALL_metamodel___partial_order___PartialOrderElement___order(fra.me.REG[0])(fra.me.REG[0]);
-        fra.me.REG[5] = CALL_metamodel___partial_order___PartialOrder_____bra(fra.me.REG[6])(fra.me.REG[6], fra.me.REG[5]);
-        fra.me.REG[5] = CALL_metamodel___partial_order___PartialOrderElement___linear_extension(fra.me.REG[5])(fra.me.REG[5]);
-        /* ./metamodel//partial_order.nit:253 */
-        CALL_standard___collection___abstract_collection___RemovableCollection___clear(fra.me.REG[2])(fra.me.REG[2]);
-        /* ./../lib/standard//collection//array.nit:231 */
-        fra.me.REG[6] = fra.me.REG[1];
-        /* ./../lib/standard//collection//array.nit:234 */
+        /* ../lib/standard/collection/array.nit:724 */
+        fra.me.REG[6] = ((Nit_NativeArray)fra.me.REG[5])->val[UNTAG_Int(REGB0)];
+        /* metamodel/partial_order.nit:252 */
+        fra.me.REG[7] = CALL_metamodel___partial_order___PartialOrderElement___order(fra.me.REG[1])(fra.me.REG[1]);
+        fra.me.REG[6] = CALL_metamodel___partial_order___PartialOrder_____bra(fra.me.REG[7])(fra.me.REG[7], fra.me.REG[6]);
+        fra.me.REG[6] = CALL_metamodel___partial_order___PartialOrderElement___linear_extension(fra.me.REG[6])(fra.me.REG[6]);
+        /* metamodel/partial_order.nit:253 */
+        CALL_standard___collection___abstract_collection___RemovableCollection___clear(fra.me.REG[3])(fra.me.REG[3]);
+        /* ../lib/standard/collection/array.nit:266 */
+        fra.me.REG[7] = fra.me.REG[2];
+        /* ../lib/standard/collection/array.nit:269 */
         REGB1 = TAG_Int(0);
-        /* ./../lib/standard//collection//array.nit:235 */
-        REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[6])!=NIT_NULL);
+        /* ../lib/standard/collection/array.nit:270 */
+        REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[7])!=NIT_NULL);
         if (UNTAG_Bool(REGB2)) {
         } else {
-          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 235);
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 270);
         }
-        REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[6]);
-        /* ./../lib/standard//collection//array.nit:236 */
-        fra.me.REG[7] = ATTR_standard___collection___array___Array____items(fra.me.REG[6]);
-        /* ./../lib/standard//collection//array.nit:237 */
+        REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[7]);
+        /* ../lib/standard/collection/array.nit:271 */
+        fra.me.REG[8] = ATTR_standard___collection___array___Array____items(fra.me.REG[7]);
+        /* ../lib/standard/collection/array.nit:272 */
         while(1) {
-          /* ./../lib/standard//collection//array.nit:23 */
-          REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[6])!=NIT_NULL);
+          /* ../lib/standard/collection/array.nit:24 */
+          REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[7])!=NIT_NULL);
           if (UNTAG_Bool(REGB2)) {
           } else {
-            nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+            nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
+          }
+          REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[7]);
+          REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+          if (UNTAG_Bool(REGB3)) {
+          } else {
+            nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
           }
-          REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[6]);
-          /* ./../lib/standard//kernel.nit:215 */
+          /* ../lib/standard/kernel.nit:235 */
           REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
-          /* ./../lib/standard//collection//array.nit:237 */
+          /* ../lib/standard/collection/array.nit:272 */
           if (UNTAG_Bool(REGB2)) {
-            /* ./../lib/standard//collection//array.nit:238 */
-            REGB2 = TAG_Bool(fra.me.REG[7]==NIT_NULL);
+            /* ../lib/standard/collection/array.nit:273 */
+            REGB2 = TAG_Bool(fra.me.REG[8]==NIT_NULL);
             if (UNTAG_Bool(REGB2)) {
-              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 238);
+              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
             }
-            /* ./../lib/standard//collection//array.nit:654 */
-            fra.me.REG[8] = ((Nit_NativeArray)fra.me.REG[7])->val[UNTAG_Int(REGB1)];
-            /* ./metamodel//partial_order.nit:255 */
-            REGB2 = CALL_standard___collection___abstract_collection___Collection___has(fra.me.REG[5])(fra.me.REG[5], fra.me.REG[8]);
+            /* ../lib/standard/collection/array.nit:724 */
+            fra.me.REG[9] = ((Nit_NativeArray)fra.me.REG[8])->val[UNTAG_Int(REGB1)];
+            /* metamodel/partial_order.nit:255 */
+            REGB2 = CALL_standard___collection___abstract_collection___Collection___has(fra.me.REG[6])(fra.me.REG[6], fra.me.REG[9]);
             REGB2 = TAG_Bool(!UNTAG_Bool(REGB2));
             if (UNTAG_Bool(REGB2)) {
-              CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[8]);
+              CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[9]);
             }
-            /* ./../lib/standard//collection//array.nit:239 */
+            /* ../lib/standard/collection/array.nit:274 */
             REGB2 = TAG_Int(1);
-            /* ./../lib/standard//kernel.nit:218 */
+            /* ../lib/standard/kernel.nit:238 */
             REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
-            /* ./../lib/standard//collection//array.nit:239 */
+            /* ../lib/standard/collection/array.nit:274 */
             REGB1 = REGB2;
           } else {
-            /* ./../lib/standard//collection//array.nit:237 */
+            /* ../lib/standard/collection/array.nit:272 */
             goto label1;
           }
         }
         label1: while(0);
-        /* ./metamodel//partial_order.nit:257 */
-        CALL_standard___collection___abstract_collection___Sequence___append(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[5]);
-        /* ./metamodel//partial_order.nit:259 */
-        fra.me.REG[5] = fra.me.REG[1];
-        /* ./metamodel//partial_order.nit:260 */
-        fra.me.REG[1] = fra.me.REG[2];
-        /* ./metamodel//partial_order.nit:261 */
-        fra.me.REG[2] = fra.me.REG[5];
-        /* ./../lib/standard//collection//array.nit:239 */
+        /* metamodel/partial_order.nit:257 */
+        CALL_standard___collection___abstract_collection___Sequence___append(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[6]);
+        /* metamodel/partial_order.nit:259 */
+        fra.me.REG[6] = fra.me.REG[2];
+        /* metamodel/partial_order.nit:260 */
+        fra.me.REG[2] = fra.me.REG[3];
+        /* metamodel/partial_order.nit:261 */
+        fra.me.REG[3] = fra.me.REG[6];
+        /* ../lib/standard/collection/array.nit:274 */
         REGB1 = TAG_Int(1);
-        /* ./../lib/standard//kernel.nit:218 */
+        /* ../lib/standard/kernel.nit:238 */
         REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-        /* ./../lib/standard//collection//array.nit:239 */
+        /* ../lib/standard/collection/array.nit:274 */
         REGB0 = REGB1;
       } else {
-        /* ./../lib/standard//collection//array.nit:237 */
+        /* ../lib/standard/collection/array.nit:272 */
         goto label2;
       }
     }
     label2: while(0);
-    /* ./metamodel//partial_order.nit:263 */
-    ATTR_metamodel___partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[0]) = fra.me.REG[1];
+    /* metamodel/partial_order.nit:263 */
+    ATTR_metamodel___partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[1]) = fra.me.REG[2];
   }
-  /* ./metamodel//partial_order.nit:265 */
-  fra.me.REG[0] = ATTR_metamodel___partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[0]);
-  REGB0 = TAG_Bool(fra.me.REG[0]!=NIT_NULL);
+  /* metamodel/partial_order.nit:265 */
+  fra.me.REG[1] = ATTR_metamodel___partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[1]);
+  REGB0 = TAG_Bool(fra.me.REG[1]!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Cast failed", NULL, LOCATE_metamodel___partial_order, 265);
@@ -1419,104 +1518,115 @@ val_t metamodel___partial_order___PartialOrderElement___linear_extension(val_t p
   goto label3;
   label3: while(0);
   stack_frame_head = fra.me.prev;
-  return fra.me.REG[0];
+  return fra.me.REG[1];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___reverse_linear_extension[] = "partial_order::PartialOrderElement::reverse_linear_extension";
 val_t metamodel___partial_order___PartialOrderElement___reverse_linear_extension(val_t p0){
-  struct {struct stack_frame_t me; val_t MORE_REG[5];} fra;
+  struct {struct stack_frame_t me; val_t MORE_REG[6];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_metamodel___partial_order;
   fra.me.line = 271;
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___reverse_linear_extension;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 6;
+  fra.me.REG_size = 7;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[3] = NIT_NULL;
   fra.me.REG[4] = NIT_NULL;
   fra.me.REG[5] = NIT_NULL;
+  fra.me.REG[6] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./metamodel//partial_order.nit:275 */
-  fra.me.REG[1] = ATTR_metamodel___partial_order___PartialOrderElement____reverse_linear_extension_cache(fra.me.REG[0]);
-  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  /* metamodel/partial_order.nit:271 */
+  fra.me.REG[1] = fra.me.REG[0];
+  /* metamodel/partial_order.nit:275 */
+  fra.me.REG[2] = ATTR_metamodel___partial_order___PartialOrderElement____reverse_linear_extension_cache(fra.me.REG[1]);
+  REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
-      REGB1 = TAG_Bool(false);
+      REGB1 = TAG_Bool(0);
       REGB0 = REGB1;
     } else {
-      REGB1 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
+      REGB1 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], NIT_NULL);
       REGB0 = REGB1;
     }
   }
   if (UNTAG_Bool(REGB0)) {
-    /* ./metamodel//partial_order.nit:276 */
-    fra.me.REG[1] = NEW_HashSet_standard___collection___hash_collection___HashSet___init();
-    /* ./metamodel//partial_order.nit:277 */
-    fra.me.REG[2] = CALL_metamodel___partial_order___PartialOrderElement___direct_greaters(fra.me.REG[0])(fra.me.REG[0]);
-    /* ./../lib/standard//collection//array.nit:234 */
+    /* metamodel/partial_order.nit:276 */
+    fra.me.REG[2] = NEW_HashSet_standard___collection___hash_collection___HashSet___init();
+    /* metamodel/partial_order.nit:277 */
+    fra.me.REG[3] = CALL_metamodel___partial_order___PartialOrderElement___direct_greaters(fra.me.REG[1])(fra.me.REG[1]);
+    /* ../lib/standard/collection/array.nit:269 */
     REGB0 = TAG_Int(0);
-    /* ./../lib/standard//collection//array.nit:235 */
-    REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+    /* ../lib/standard/collection/array.nit:270 */
+    REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 235);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 270);
     }
-    REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-    /* ./../lib/standard//collection//array.nit:236 */
-    fra.me.REG[3] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
-    /* ./../lib/standard//collection//array.nit:237 */
+    REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3]);
+    /* ../lib/standard/collection/array.nit:271 */
+    fra.me.REG[4] = ATTR_standard___collection___array___Array____items(fra.me.REG[3]);
+    /* ../lib/standard/collection/array.nit:272 */
     while(1) {
-      /* ./../lib/standard//collection//array.nit:23 */
-      REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+      /* ../lib/standard/collection/array.nit:24 */
+      REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
       } else {
-        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
       }
-      REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-      /* ./../lib/standard//kernel.nit:215 */
+      REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3]);
+      REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:235 */
       REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-      /* ./../lib/standard//collection//array.nit:237 */
+      /* ../lib/standard/collection/array.nit:272 */
       if (UNTAG_Bool(REGB1)) {
-        /* ./../lib/standard//collection//array.nit:238 */
-        REGB1 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
+        /* ../lib/standard/collection/array.nit:273 */
+        REGB1 = TAG_Bool(fra.me.REG[4]==NIT_NULL);
         if (UNTAG_Bool(REGB1)) {
-          nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 238);
+          nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
         }
-        /* ./../lib/standard//collection//array.nit:654 */
-        fra.me.REG[4] = ((Nit_NativeArray)fra.me.REG[3])->val[UNTAG_Int(REGB0)];
-        /* ./metamodel//partial_order.nit:278 */
-        fra.me.REG[5] = CALL_metamodel___partial_order___PartialOrderElement___order(fra.me.REG[0])(fra.me.REG[0]);
-        fra.me.REG[4] = CALL_metamodel___partial_order___PartialOrder_____bra(fra.me.REG[5])(fra.me.REG[5], fra.me.REG[4]);
-        fra.me.REG[4] = CALL_metamodel___partial_order___PartialOrderElement___linear_extension(fra.me.REG[4])(fra.me.REG[4]);
-        /* ./metamodel//partial_order.nit:279 */
-        CALL_standard___collection___abstract_collection___SimpleCollection___add_all(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[4]);
-        /* ./../lib/standard//collection//array.nit:239 */
+        /* ../lib/standard/collection/array.nit:724 */
+        fra.me.REG[5] = ((Nit_NativeArray)fra.me.REG[4])->val[UNTAG_Int(REGB0)];
+        /* metamodel/partial_order.nit:278 */
+        fra.me.REG[6] = CALL_metamodel___partial_order___PartialOrderElement___order(fra.me.REG[1])(fra.me.REG[1]);
+        fra.me.REG[5] = CALL_metamodel___partial_order___PartialOrder_____bra(fra.me.REG[6])(fra.me.REG[6], fra.me.REG[5]);
+        fra.me.REG[5] = CALL_metamodel___partial_order___PartialOrderElement___linear_extension(fra.me.REG[5])(fra.me.REG[5]);
+        /* metamodel/partial_order.nit:279 */
+        CALL_standard___collection___abstract_collection___SimpleCollection___add_all(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[5]);
+        /* ../lib/standard/collection/array.nit:274 */
         REGB1 = TAG_Int(1);
-        /* ./../lib/standard//kernel.nit:218 */
+        /* ../lib/standard/kernel.nit:238 */
         REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-        /* ./../lib/standard//collection//array.nit:239 */
+        /* ../lib/standard/collection/array.nit:274 */
         REGB0 = REGB1;
       } else {
-        /* ./../lib/standard//collection//array.nit:237 */
+        /* ../lib/standard/collection/array.nit:272 */
         goto label1;
       }
     }
     label1: while(0);
-    /* ./metamodel//partial_order.nit:281 */
-    fra.me.REG[3] = CALL_metamodel___partial_order___PartialOrderElement___value(fra.me.REG[0])(fra.me.REG[0]);
-    CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[3]);
-    /* ./metamodel//partial_order.nit:282 */
-    fra.me.REG[1] = CALL_standard___collection___array___Collection___to_a(fra.me.REG[1])(fra.me.REG[1]);
-    ATTR_metamodel___partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[0]) = fra.me.REG[1];
-  }
-  /* ./metamodel//partial_order.nit:284 */
-  fra.me.REG[0] = ATTR_metamodel___partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[0]);
-  REGB0 = TAG_Bool(fra.me.REG[0]!=NIT_NULL);
+    /* metamodel/partial_order.nit:281 */
+    fra.me.REG[4] = CALL_metamodel___partial_order___PartialOrderElement___value(fra.me.REG[1])(fra.me.REG[1]);
+    CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[4]);
+    /* metamodel/partial_order.nit:282 */
+    fra.me.REG[2] = CALL_standard___collection___array___Collection___to_a(fra.me.REG[2])(fra.me.REG[2]);
+    ATTR_metamodel___partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[1]) = fra.me.REG[2];
+  }
+  /* metamodel/partial_order.nit:284 */
+  fra.me.REG[1] = ATTR_metamodel___partial_order___PartialOrderElement____linear_extension_cache(fra.me.REG[1]);
+  REGB0 = TAG_Bool(fra.me.REG[1]!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Cast failed", NULL, LOCATE_metamodel___partial_order, 284);
@@ -1524,8 +1634,9 @@ val_t metamodel___partial_order___PartialOrderElement___reverse_linear_extension
   goto label2;
   label2: while(0);
   stack_frame_head = fra.me.prev;
-  return fra.me.REG[0];
+  return fra.me.REG[1];
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement_____l[] = "partial_order::PartialOrderElement::<";
 val_t metamodel___partial_order___PartialOrderElement_____l(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -1536,11 +1647,12 @@ val_t metamodel___partial_order___PartialOrderElement_____l(val_t p0, val_t p1){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement_____l;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:290 */
+  /* metamodel/partial_order.nit:290 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____greaters(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1553,6 +1665,7 @@ val_t metamodel___partial_order___PartialOrderElement_____l(val_t p0, val_t p1){
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement_____leq[] = "partial_order::PartialOrderElement::<=";
 val_t metamodel___partial_order___PartialOrderElement_____leq(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -1564,12 +1677,13 @@ val_t metamodel___partial_order___PartialOrderElement_____leq(val_t p0, val_t p1
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement_____leq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:296 */
+  /* metamodel/partial_order.nit:296 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____value(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1583,7 +1697,7 @@ val_t metamodel___partial_order___PartialOrderElement_____leq(val_t p0, val_t p1
     REGB0 = REGB1;
   }
   if (UNTAG_Bool(REGB0)) {
-    REGB0 = TAG_Bool(true);
+    REGB0 = TAG_Bool(1);
   } else {
     REGB1 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____greaters(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
@@ -1599,6 +1713,7 @@ val_t metamodel___partial_order___PartialOrderElement_____leq(val_t p0, val_t p1
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement_____g[] = "partial_order::PartialOrderElement::>";
 val_t metamodel___partial_order___PartialOrderElement_____g(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -1609,12 +1724,13 @@ val_t metamodel___partial_order___PartialOrderElement_____g(val_t p0, val_t p1){
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement_____g;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:302 */
+  /* metamodel/partial_order.nit:302 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1634,6 +1750,7 @@ val_t metamodel___partial_order___PartialOrderElement_____g(val_t p0, val_t p1){
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement_____geq[] = "partial_order::PartialOrderElement::>=";
 val_t metamodel___partial_order___PartialOrderElement_____geq(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -1645,12 +1762,13 @@ val_t metamodel___partial_order___PartialOrderElement_____geq(val_t p0, val_t p1
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement_____geq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:308 */
+  /* metamodel/partial_order.nit:308 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____value(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1664,7 +1782,7 @@ val_t metamodel___partial_order___PartialOrderElement_____geq(val_t p0, val_t p1
     REGB0 = REGB1;
   }
   if (UNTAG_Bool(REGB0)) {
-    REGB0 = TAG_Bool(true);
+    REGB0 = TAG_Bool(1);
   } else {
     REGB1 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
@@ -1687,6 +1805,7 @@ val_t metamodel___partial_order___PartialOrderElement_____geq(val_t p0, val_t p1
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___register_direct_smallers[] = "partial_order::PartialOrderElement::register_direct_smallers";
 void metamodel___partial_order___PartialOrderElement___register_direct_smallers(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -1697,11 +1816,12 @@ void metamodel___partial_order___PartialOrderElement___register_direct_smallers(
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___register_direct_smallers;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./metamodel//partial_order.nit:313 */
+  /* metamodel/partial_order.nit:313 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____direct_smallers(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -1712,6 +1832,7 @@ void metamodel___partial_order___PartialOrderElement___register_direct_smallers(
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_metamodel___partial_order___PartialOrderElement___init[] = "partial_order::PartialOrderElement::init";
 void metamodel___partial_order___PartialOrderElement___init(val_t p0, val_t p1, val_t p2, val_t p3, int* init_table){
   int itpos1 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_metamodel___partial_order___PartialOrderElement].i;
   struct {struct stack_frame_t me; val_t MORE_REG[6];} fra;
@@ -1727,6 +1848,7 @@ void metamodel___partial_order___PartialOrderElement___init(val_t p0, val_t p1,
   fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 7;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
@@ -1738,64 +1860,69 @@ void metamodel___partial_order___PartialOrderElement___init(val_t p0, val_t p1,
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
   fra.me.REG[3] = p3;
-  /* ./metamodel//partial_order.nit:318 */
+  /* metamodel/partial_order.nit:318 */
   ATTR_metamodel___partial_order___PartialOrderElement____order(fra.me.REG[0]) = fra.me.REG[1];
-  /* ./metamodel//partial_order.nit:319 */
+  /* metamodel/partial_order.nit:319 */
   ATTR_metamodel___partial_order___PartialOrderElement____value(fra.me.REG[0]) = fra.me.REG[2];
-  /* ./metamodel//partial_order.nit:320 */
+  /* metamodel/partial_order.nit:320 */
   ATTR_metamodel___partial_order___PartialOrderElement____direct_greaters(fra.me.REG[0]) = fra.me.REG[3];
-  /* ./metamodel//partial_order.nit:321 */
+  /* metamodel/partial_order.nit:321 */
   fra.me.REG[1] = NEW_Array_standard___collection___array___Array___init();
   ATTR_metamodel___partial_order___PartialOrderElement____direct_smallers(fra.me.REG[0]) = fra.me.REG[1];
-  /* ./metamodel//partial_order.nit:323 */
+  /* metamodel/partial_order.nit:323 */
   fra.me.REG[1] = NEW_HashSet_standard___collection___hash_collection___HashSet___init();
   ATTR_metamodel___partial_order___PartialOrderElement____greaters(fra.me.REG[0]) = fra.me.REG[1];
-  /* ./metamodel//partial_order.nit:324 */
+  /* metamodel/partial_order.nit:324 */
   fra.me.REG[1] = NEW_HashSet_standard___collection___hash_collection___HashSet___init();
   ATTR_metamodel___partial_order___PartialOrderElement____smallers_cache(fra.me.REG[0]) = fra.me.REG[1];
-  /* ./metamodel//partial_order.nit:326 */
+  /* metamodel/partial_order.nit:326 */
   REGB0 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____greaters(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     nit_abort("Uninitialized attribute %s", "_greaters", LOCATE_metamodel___partial_order, 326);
   }
   fra.me.REG[1] = ATTR_metamodel___partial_order___PartialOrderElement____greaters(fra.me.REG[0]);
-  /* ./metamodel//partial_order.nit:327 */
+  /* metamodel/partial_order.nit:327 */
   REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:234 */
+  /* ../lib/standard/collection/array.nit:269 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:235 */
+  /* ../lib/standard/collection/array.nit:270 */
   REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
   if (UNTAG_Bool(REGB2)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 235);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 270);
   }
   REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3]);
-  /* ./../lib/standard//collection//array.nit:236 */
+  /* ../lib/standard/collection/array.nit:271 */
   fra.me.REG[4] = ATTR_standard___collection___array___Array____items(fra.me.REG[3]);
-  /* ./../lib/standard//collection//array.nit:237 */
+  /* ../lib/standard/collection/array.nit:272 */
   while(1) {
-    /* ./../lib/standard//collection//array.nit:23 */
+    /* ../lib/standard/collection/array.nit:24 */
     REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
     if (UNTAG_Bool(REGB2)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
     }
     REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3]);
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB3)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
-    /* ./../lib/standard//collection//array.nit:237 */
+    /* ../lib/standard/collection/array.nit:272 */
     if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:238 */
+      /* ../lib/standard/collection/array.nit:273 */
       REGB2 = TAG_Bool(fra.me.REG[4]==NIT_NULL);
       if (UNTAG_Bool(REGB2)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 238);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
       }
-      /* ./../lib/standard//collection//array.nit:654 */
+      /* ../lib/standard/collection/array.nit:724 */
       fra.me.REG[5] = ((Nit_NativeArray)fra.me.REG[4])->val[UNTAG_Int(REGB1)];
-      /* ./metamodel//partial_order.nit:329 */
+      /* metamodel/partial_order.nit:329 */
       CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[5]);
-      /* ./metamodel//partial_order.nit:330 */
+      /* metamodel/partial_order.nit:330 */
       REGB2 = TAG_Bool(ATTR_metamodel___partial_order___PartialOrderElement____order(fra.me.REG[0])!=NIT_NULL);
       if (UNTAG_Bool(REGB2)) {
       } else {
@@ -1803,38 +1930,43 @@ void metamodel___partial_order___PartialOrderElement___init(val_t p0, val_t p1,
       }
       fra.me.REG[6] = ATTR_metamodel___partial_order___PartialOrderElement____order(fra.me.REG[0]);
       fra.me.REG[5] = CALL_metamodel___partial_order___PartialOrder_____bra(fra.me.REG[6])(fra.me.REG[6], fra.me.REG[5]);
-      /* ./metamodel//partial_order.nit:331 */
+      /* metamodel/partial_order.nit:331 */
       REGB2 = CALL_metamodel___partial_order___PartialOrderElement___rank(fra.me.REG[5])(fra.me.REG[5]);
-      /* ./../lib/standard//kernel.nit:216 */
+      REGB3 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB3)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:236 */
       REGB2 = TAG_Bool(UNTAG_Int(REGB2)>=UNTAG_Int(REGB0));
-      /* ./metamodel//partial_order.nit:331 */
+      /* metamodel/partial_order.nit:331 */
       if (UNTAG_Bool(REGB2)) {
-        /* ./metamodel//partial_order.nit:332 */
+        /* metamodel/partial_order.nit:332 */
         REGB2 = CALL_metamodel___partial_order___PartialOrderElement___rank(fra.me.REG[5])(fra.me.REG[5]);
         REGB3 = TAG_Int(1);
-        /* ./../lib/standard//kernel.nit:218 */
+        /* ../lib/standard/kernel.nit:238 */
         REGB3 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB3));
-        /* ./metamodel//partial_order.nit:332 */
+        /* metamodel/partial_order.nit:332 */
         REGB0 = REGB3;
       }
-      /* ./metamodel//partial_order.nit:334 */
+      /* metamodel/partial_order.nit:334 */
       CALL_metamodel___partial_order___PartialOrderElement___register_direct_smallers(fra.me.REG[5])(fra.me.REG[5], fra.me.REG[2]);
-      /* ./metamodel//partial_order.nit:335 */
+      /* metamodel/partial_order.nit:335 */
       fra.me.REG[5] = CALL_metamodel___partial_order___PartialOrderElement___greaters(fra.me.REG[5])(fra.me.REG[5]);
       CALL_standard___collection___abstract_collection___Collection___iterate(fra.me.REG[5])(fra.me.REG[5], (&(fra.me)), ((fun_t)OC_metamodel___partial_order___PartialOrderElement___init_1));
-      /* ./../lib/standard//collection//array.nit:239 */
+      /* ../lib/standard/collection/array.nit:274 */
       REGB3 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB3 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:239 */
+      /* ../lib/standard/collection/array.nit:274 */
       REGB1 = REGB3;
     } else {
-      /* ./../lib/standard//collection//array.nit:237 */
+      /* ../lib/standard/collection/array.nit:272 */
       goto label2;
     }
   }
   label2: while(0);
-  /* ./metamodel//partial_order.nit:339 */
+  /* metamodel/partial_order.nit:339 */
   ATTR_metamodel___partial_order___PartialOrderElement____rank(fra.me.REG[0]) = REGB0;
   stack_frame_head = fra.me.prev;
   init_table[itpos1] = 1;
@@ -1849,9 +1981,10 @@ void metamodel___partial_order___PartialOrderElement___init(val_t p0, val_t p1,
         fra.me.meth = LOCATE_metamodel___partial_order___PartialOrderElement___init;
         fra.me.has_broke = 0;
         fra.me.REG_size = 1;
+        fra.me.nitni_local_ref_head = NULL;
         fra.me.REG[0] = NIT_NULL;
         fra.me.REG[0] = p0;
-        /* ./metamodel//partial_order.nit:336 */
+        /* metamodel/partial_order.nit:336 */
         CALL_standard___collection___abstract_collection___SimpleCollection___add(closctx->REG[1])(closctx->REG[1], fra.me.REG[0]);
         stack_frame_head = fra.me.prev;
         return;