c_src: update

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

diff --git a/c_src/opts._sep.c b/c_src/opts._sep.c
index e2478c5..20509f6 100644 (file)
--- a/c_src/opts._sep.c
+++ b/c_src/opts._sep.c
@@ -1,25 +1,5 @@
 /* This C file is generated by NIT to compile module opts. */
 #include "opts._sep.h"
-val_t opts___Option___to_s(val_t p0){
-  struct {struct stack_frame_t me;} fra;
-  val_t REGB0;
-  val_t tmp;
-  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
-  fra.me.file = LOCATE_opts;
-  fra.me.line = 54;
-  fra.me.meth = LOCATE_opts___Option___to_s;
-  fra.me.has_broke = 0;
-  fra.me.REG_size = 1;
-  fra.me.REG[0] = NIT_NULL;
-  fra.me.REG[0] = p0;
-  REGB0 = TAG_Int(2);
-  fra.me.REG[0] = CALL_opts___Option___pretty(fra.me.REG[0])(fra.me.REG[0], REGB0);
-  /* ./../lib/opts.nit:55 */
-  goto label1;
-  label1: while(0);
-  stack_frame_head = fra.me.prev;
-  return fra.me.REG[0];
-}
 val_t opts___Option___names(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -32,13 +12,11 @@ val_t opts___Option___names(val_t p0){
   fra.me.REG_size = 1;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  REGB0 = TAG_Bool(ATTR_opts___Option____names(fra.me.REG[0])!=NIT_NULL);
   /* ./../lib/opts.nit:16 */
+  REGB0 = TAG_Bool(ATTR_opts___Option____names(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_names");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 16);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_names", LOCATE_opts, 16);
   }
   fra.me.REG[0] = ATTR_opts___Option____names(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
@@ -56,13 +34,11 @@ val_t opts___Option___helptext(val_t p0){
   fra.me.REG_size = 1;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  REGB0 = TAG_Bool(ATTR_opts___Option____helptext(fra.me.REG[0])!=NIT_NULL);
   /* ./../lib/opts.nit:22 */
+  REGB0 = TAG_Bool(ATTR_opts___Option____helptext(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_helptext");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 22);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_helptext", LOCATE_opts, 22);
   }
   fra.me.REG[0] = ATTR_opts___Option____helptext(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
@@ -80,13 +56,11 @@ val_t opts___Option___mandatory(val_t p0){
   fra.me.REG_size = 1;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  REGB0 = TAG_Bool(ATTR_opts___Option____mandatory(fra.me.REG[0])!=NIT_NULL);
   /* ./../lib/opts.nit:25 */
+  REGB0 = TAG_Bool(ATTR_opts___Option____mandatory(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_mandatory");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 25);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_mandatory", LOCATE_opts, 25);
   }
   REGB0 = ATTR_opts___Option____mandatory(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
@@ -140,14 +114,12 @@ val_t opts___Option___value(val_t p0){
   fra.me.REG_size = 1;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
+  /* ./../lib/opts.nit:32 */
   fra.me.REG[0] = ATTR_opts___Option____value(fra.me.REG[0]);
   REGB0 = TAG_Bool((fra.me.REG[0]==NIT_NULL) || VAL_ISA(fra.me.REG[0], COLOR_Object, ID_Object)) /*cast VALUE*/;
-  /* ./../lib/opts.nit:32 */
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Cast failed");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 32);
-    nit_exit(1);
+    nit_abort("Cast failed", NULL, LOCATE_opts, 32);
   }
   goto label1;
   label1: while(0);
@@ -165,8 +137,8 @@ val_t opts___Option___default_value(val_t p0){
   fra.me.REG_size = 1;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  fra.me.REG[0] = ATTR_opts___Option____default_value(fra.me.REG[0]);
   /* ./../lib/opts.nit:34 */
+  fra.me.REG[0] = ATTR_opts___Option____default_value(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
@@ -210,8 +182,8 @@ void opts___Option___init_opt(val_t p0, val_t p1, val_t p2, val_t p3, int* init_
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
   fra.me.REG[3] = p3;
-  REGB0 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
   /* ./../lib/opts.nit:40 */
+  REGB0 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
     REGB1 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
@@ -224,24 +196,22 @@ void opts___Option___init_opt(val_t p0, val_t p1, val_t p2, val_t p3, int* init_
     }
   }
   if (UNTAG_Bool(REGB0)) {
-    fra.me.REG[4] = NEW_Array_array___Array___init();
     /* ./../lib/opts.nit:41 */
+    fra.me.REG[4] = NEW_Array_array___Array___init();
     ATTR_opts___Option____names(fra.me.REG[0]) = fra.me.REG[4];
   } else {
-    REGB0 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
     /* ./../lib/opts.nit:43 */
+    REGB0 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
-      fprintf(stderr, "Reciever is null");
-      fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 43);
-      nit_exit(1);
+      nit_abort("Reciever is null", NULL, LOCATE_opts, 43);
     }
     fra.me.REG[3] = CALL_array___Collection___to_a(fra.me.REG[3])(fra.me.REG[3]);
     ATTR_opts___Option____names(fra.me.REG[0]) = fra.me.REG[3];
   }
   /* ./../lib/opts.nit:45 */
   ATTR_opts___Option____helptext(fra.me.REG[0]) = fra.me.REG[1];
-  REGB0 = TAG_Bool(false);
   /* ./../lib/opts.nit:46 */
+  REGB0 = TAG_Bool(false);
   ATTR_opts___Option____mandatory(fra.me.REG[0]) = REGB0;
   /* ./../lib/opts.nit:47 */
   ATTR_opts___Option____default_value(fra.me.REG[0]) = fra.me.REG[2];
@@ -265,27 +235,43 @@ void opts___Option___add_aliases(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  REGB0 = TAG_Bool(VAL_ISA(fra.me.REG[1], COLOR_Array, ID_Array)) /*cast Array[String]*/;
   /* ./../lib/opts.nit:51 */
+  REGB0 = TAG_Bool(VAL_ISA(fra.me.REG[1], COLOR_Array, ID_Array)) /*cast Array[String]*/;
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Cast failed");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 51);
-    nit_exit(1);
+    nit_abort("Cast failed", NULL, LOCATE_opts, 51);
   }
-  REGB0 = TAG_Bool(ATTR_opts___Option____names(fra.me.REG[0])!=NIT_NULL);
   /* ./../lib/opts.nit:52 */
+  REGB0 = TAG_Bool(ATTR_opts___Option____names(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_names");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 52);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_names", LOCATE_opts, 52);
   }
   fra.me.REG[0] = ATTR_opts___Option____names(fra.me.REG[0]);
   CALL_abstract_collection___SimpleCollection___add_all(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
   stack_frame_head = fra.me.prev;
   return;
 }
+val_t opts___Option___to_s(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_opts;
+  fra.me.line = 54;
+  fra.me.meth = LOCATE_opts___Option___to_s;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./../lib/opts.nit:55 */
+  REGB0 = TAG_Int(2);
+  fra.me.REG[0] = CALL_opts___Option___pretty(fra.me.REG[0])(fra.me.REG[0], REGB0);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
 val_t opts___Option___pretty(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
   val_t REGB0;
@@ -315,14 +301,13 @@ val_t opts___Option___pretty(val_t p0, val_t p1){
     once_value_1 = fra.me.REG[1];
     register_static_object(&once_value_1);
   } else fra.me.REG[1] = once_value_1;
+  fra.me.REG[1] = fra.me.REG[1];
   fra.me.REG[1] = NEW_Buffer_string___Buffer___from(fra.me.REG[1]);
-  REGB1 = TAG_Bool(ATTR_opts___Option____names(fra.me.REG[0])!=NIT_NULL);
   /* ./../lib/opts.nit:61 */
+  REGB1 = TAG_Bool(ATTR_opts___Option____names(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_names");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 61);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_names", LOCATE_opts, 61);
   }
   fra.me.REG[2] = ATTR_opts___Option____names(fra.me.REG[0]);
   if (!once_value_2) {
@@ -332,6 +317,7 @@ val_t opts___Option___pretty(val_t p0, val_t p1){
     once_value_2 = fra.me.REG[3];
     register_static_object(&once_value_2);
   } else fra.me.REG[3] = once_value_2;
+  fra.me.REG[3] = fra.me.REG[3];
   fra.me.REG[3] = CALL_string___Collection___join(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[3]);
   CALL_abstract_collection___Sequence___append(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[3]);
   /* ./../lib/opts.nit:62 */
@@ -342,18 +328,20 @@ val_t opts___Option___pretty(val_t p0, val_t p1){
     once_value_3 = fra.me.REG[3];
     register_static_object(&once_value_3);
   } else fra.me.REG[3] = once_value_3;
+  fra.me.REG[3] = fra.me.REG[3];
   CALL_abstract_collection___Sequence___append(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[3]);
-  REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
   /* ./../lib/standard//collection//array.nit:23 */
+  REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_length");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_array, 23);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
   }
   REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+  /* ./../lib/standard//kernel.nit:217 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
+  /* ./../lib/opts.nit:64 */
   REGB0 = TAG_Int(0);
+  /* ./../lib/standard//kernel.nit:214 */
   REGB0 = TAG_Bool(UNTAG_Int(REGB1)>UNTAG_Int(REGB0));
   /* ./../lib/opts.nit:64 */
   if (UNTAG_Bool(REGB0)) {
@@ -364,14 +352,15 @@ val_t opts___Option___pretty(val_t p0, val_t p1){
       once_value_4 = fra.me.REG[3];
       register_static_object(&once_value_4);
     } else fra.me.REG[3] = once_value_4;
+    fra.me.REG[3] = fra.me.REG[3];
     fra.me.REG[3] = CALL_string___String_____star(fra.me.REG[3])(fra.me.REG[3], REGB1);
     CALL_abstract_collection___Sequence___append(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[3]);
   }
-  fra.me.REG[0] = CALL_opts___Option___helptext(fra.me.REG[0])(fra.me.REG[0]);
   /* ./../lib/opts.nit:65 */
+  fra.me.REG[0] = CALL_opts___Option___helptext(fra.me.REG[0])(fra.me.REG[0]);
   CALL_abstract_collection___Sequence___append(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[0]);
-  fra.me.REG[1] = CALL_string___Object___to_s(fra.me.REG[1])(fra.me.REG[1]);
   /* ./../lib/opts.nit:67 */
+  fra.me.REG[1] = CALL_string___Object___to_s(fra.me.REG[1])(fra.me.REG[1]);
   goto label5;
   label5: while(0);
   stack_frame_head = fra.me.prev;
@@ -395,17 +384,18 @@ val_t opts___Option___pretty_default(val_t p0){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
-  fra.me.REG[1] = CALL_opts___Option___default_value(fra.me.REG[0])(fra.me.REG[0]);
-  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
   /* ./../lib/opts.nit:72 */
+  fra.me.REG[0] = CALL_opts___Option___default_value(fra.me.REG[0])(fra.me.REG[0]);
+  /* ./../lib/opts.nit:73 */
+  REGB0 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
       REGB1 = TAG_Bool(false);
       REGB0 = REGB1;
     } else {
-      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[0])(fra.me.REG[0], NIT_NULL);
       REGB0 = REGB1;
     }
   }
@@ -413,7 +403,6 @@ val_t opts___Option___pretty_default(val_t p0){
   if (UNTAG_Bool(REGB0)) {
     REGB0 = TAG_Int(3);
     fra.me.REG[1] = NEW_Array_array___Array___with_capacity(REGB0);
-    /* ./../lib/opts.nit:73 */
     if (!once_value_1) {
       fra.me.REG[2] = BOX_NativeString(" (");
       REGB0 = TAG_Int(2);
@@ -421,10 +410,10 @@ val_t opts___Option___pretty_default(val_t p0){
       once_value_1 = fra.me.REG[2];
       register_static_object(&once_value_1);
     } else fra.me.REG[2] = once_value_1;
-    array___Array___add(fra.me.REG[1], fra.me.REG[2]);
-    fra.me.REG[0] = CALL_opts___Option___default_value(fra.me.REG[0])(fra.me.REG[0]);
+    fra.me.REG[2] = fra.me.REG[2];
+    CALL_abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
     fra.me.REG[0] = CALL_string___Object___to_s(fra.me.REG[0])(fra.me.REG[0]);
-    array___Array___add(fra.me.REG[1], fra.me.REG[0]);
+    CALL_abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[0]);
     if (!once_value_2) {
       fra.me.REG[0] = BOX_NativeString(")");
       REGB0 = TAG_Int(1);
@@ -432,11 +421,12 @@ val_t opts___Option___pretty_default(val_t p0){
       once_value_2 = fra.me.REG[0];
       register_static_object(&once_value_2);
     } else fra.me.REG[0] = once_value_2;
-    array___Array___add(fra.me.REG[1], fra.me.REG[0]);
+    fra.me.REG[0] = fra.me.REG[0];
+    CALL_abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[0]);
     fra.me.REG[1] = CALL_string___Object___to_s(fra.me.REG[1])(fra.me.REG[1]);
     goto label3;
   }
-  /* ./../lib/opts.nit:75 */
+  /* ./../lib/opts.nit:74 */
   if (!once_value_4) {
     fra.me.REG[0] = BOX_NativeString("");
     REGB0 = TAG_Int(0);
@@ -444,6 +434,7 @@ val_t opts___Option___pretty_default(val_t p0){
     once_value_4 = fra.me.REG[0];
     register_static_object(&once_value_4);
   } else fra.me.REG[0] = once_value_4;
+  fra.me.REG[0] = fra.me.REG[0];
   fra.me.REG[1] = fra.me.REG[0];
   goto label3;
   label3: while(0);
@@ -455,34 +446,35 @@ void opts___Option___read_param(val_t p0, val_t p1){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 78;
+  fra.me.line = 77;
   fra.me.meth = LOCATE_opts___Option___read_param;
   fra.me.has_broke = 0;
   fra.me.REG_size = 0;
-  /* ./../lib/opts.nit:78 */
-  fprintf(stderr, "Deferred method called");
-  fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 78);
-  nit_exit(1);
+  /* ./../lib/opts.nit:77 */
+  nit_abort("Deferred method called", NULL, LOCATE_opts, 77);
   stack_frame_head = fra.me.prev;
   return;
 }
-val_t opts___OptionText___to_s(val_t p0){
-  struct {struct stack_frame_t me;} fra;
+void opts___OptionText___init(val_t p0, val_t p1, int* init_table){
+  int itpos1 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionText].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t tmp;
+  if (init_table[itpos1]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 88;
-  fra.me.meth = LOCATE_opts___OptionText___to_s;
+  fra.me.line = 83;
+  fra.me.meth = LOCATE_opts___OptionText___init;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 1;
+  fra.me.REG_size = 2;
   fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  fra.me.REG[0] = CALL_opts___Option___helptext(fra.me.REG[0])(fra.me.REG[0]);
-  /* ./../lib/opts.nit:88 */
-  goto label1;
-  label1: while(0);
+  fra.me.REG[1] = p1;
+  /* ./../lib/opts.nit:83 */
+  CALL_opts___Option___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], NIT_NULL, NIT_NULL, init_table);
   stack_frame_head = fra.me.prev;
-  return fra.me.REG[0];
+  init_table[itpos1] = 1;
+  return;
 }
 val_t opts___OptionText___pretty(val_t p0, val_t p1){
   struct {struct stack_frame_t me;} fra;
@@ -490,60 +482,37 @@ val_t opts___OptionText___pretty(val_t p0, val_t p1){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 86;
+  fra.me.line = 85;
   fra.me.meth = LOCATE_opts___OptionText___pretty;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
+  /* ./../lib/opts.nit:85 */
   fra.me.REG[0] = CALL_string___Object___to_s(fra.me.REG[0])(fra.me.REG[0]);
-  /* ./../lib/opts.nit:86 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
-void opts___OptionText___init(val_t p0, val_t p1, int* init_table){
-  int itpos1 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionText].i;
-  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
-  val_t tmp;
-  if (init_table[itpos1]) return;
-  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
-  fra.me.file = LOCATE_opts;
-  fra.me.line = 84;
-  fra.me.meth = LOCATE_opts___OptionText___init;
-  fra.me.has_broke = 0;
-  fra.me.REG_size = 2;
-  fra.me.REG[0] = NIT_NULL;
-  fra.me.REG[1] = NIT_NULL;
-  fra.me.REG[0] = p0;
-  fra.me.REG[1] = p1;
-  /* ./../lib/opts.nit:84 */
-  CALL_opts___Option___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], NIT_NULL, NIT_NULL, init_table);
-  stack_frame_head = fra.me.prev;
-  init_table[itpos1] = 1;
-  return;
-}
-void opts___OptionBool___read_param(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
-  val_t REGB0;
+val_t opts___OptionText___to_s(val_t p0){
+  struct {struct stack_frame_t me;} fra;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 97;
-  fra.me.meth = LOCATE_opts___OptionBool___read_param;
+  fra.me.line = 87;
+  fra.me.meth = LOCATE_opts___OptionText___to_s;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 2;
+  fra.me.REG_size = 1;
   fra.me.REG[0] = NIT_NULL;
-  fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  fra.me.REG[1] = p1;
-  REGB0 = TAG_Bool(true);
-  /* ./../lib/opts.nit:97 */
-  CALL_opts___Option___value__eq(fra.me.REG[0])(fra.me.REG[0], REGB0);
+  /* ./../lib/opts.nit:87 */
+  fra.me.REG[0] = CALL_opts___Option___helptext(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
   stack_frame_head = fra.me.prev;
-  return;
+  return fra.me.REG[0];
 }
 void opts___OptionBool___init(val_t p0, val_t p1, val_t p2, int* init_table){
   int itpos2 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionBool].i;
@@ -553,7 +522,7 @@ void opts___OptionBool___init(val_t p0, val_t p1, val_t p2, int* init_table){
   if (init_table[itpos2]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 95;
+  fra.me.line = 94;
   fra.me.meth = LOCATE_opts___OptionBool___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -563,13 +532,11 @@ void opts___OptionBool___init(val_t p0, val_t p1, val_t p2, int* init_table){
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
+  /* ./../lib/opts.nit:94 */
   REGB0 = TAG_Bool(VAL_ISA(fra.me.REG[2], COLOR_Array, ID_Array)) /*cast Array[String]*/;
-  /* ./../lib/opts.nit:95 */
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Cast failed");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 95);
-    nit_exit(1);
+    nit_abort("Cast failed", NULL, LOCATE_opts, 94);
   }
   REGB0 = TAG_Bool(false);
   CALL_opts___Option___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], REGB0, fra.me.REG[2], init_table);
@@ -577,24 +544,22 @@ void opts___OptionBool___init(val_t p0, val_t p1, val_t p2, int* init_table){
   init_table[itpos2] = 1;
   return;
 }
-void opts___OptionCount___read_param(val_t p0, val_t p1){
+void opts___OptionBool___read_param(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 106;
-  fra.me.meth = LOCATE_opts___OptionCount___read_param;
+  fra.me.line = 96;
+  fra.me.meth = LOCATE_opts___OptionBool___read_param;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  fra.me.REG[1] = CALL_opts___Option___value(fra.me.REG[0])(fra.me.REG[0]);
-  REGB0 = TAG_Int(1);
-  REGB0 = TAG_Int(UNTAG_Int(fra.me.REG[1])+UNTAG_Int(REGB0));
-  /* ./../lib/opts.nit:106 */
+  /* ./../lib/opts.nit:96 */
+  REGB0 = TAG_Bool(true);
   CALL_opts___Option___value__eq(fra.me.REG[0])(fra.me.REG[0], REGB0);
   stack_frame_head = fra.me.prev;
   return;
@@ -607,7 +572,7 @@ void opts___OptionCount___init(val_t p0, val_t p1, val_t p2, int* init_table){
   if (init_table[itpos3]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 104;
+  fra.me.line = 103;
   fra.me.meth = LOCATE_opts___OptionCount___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -617,13 +582,11 @@ void opts___OptionCount___init(val_t p0, val_t p1, val_t p2, int* init_table){
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
+  /* ./../lib/opts.nit:103 */
   REGB0 = TAG_Bool(VAL_ISA(fra.me.REG[2], COLOR_Array, ID_Array)) /*cast Array[String]*/;
-  /* ./../lib/opts.nit:104 */
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Cast failed");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 104);
-    nit_exit(1);
+    nit_abort("Cast failed", NULL, LOCATE_opts, 103);
   }
   REGB0 = TAG_Int(0);
   CALL_opts___Option___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], REGB0, fra.me.REG[2], init_table);
@@ -631,13 +594,51 @@ void opts___OptionCount___init(val_t p0, val_t p1, val_t p2, int* init_table){
   init_table[itpos3] = 1;
   return;
 }
+void opts___OptionCount___read_param(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_opts;
+  fra.me.line = 105;
+  fra.me.meth = LOCATE_opts___OptionCount___read_param;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/opts.nit:105 */
+  fra.me.REG[1] = CALL_opts___Option___value(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Int(1);
+  /* ./../lib/standard//kernel.nit:215 */
+  REGB0 = TAG_Int(UNTAG_Int(fra.me.REG[1])+UNTAG_Int(REGB0));
+  /* ./../lib/opts.nit:105 */
+  CALL_opts___Option___value__eq(fra.me.REG[0])(fra.me.REG[0], REGB0);
+  stack_frame_head = fra.me.prev;
+  return;
+}
+val_t opts___OptionParameter___convert(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_opts;
+  fra.me.line = 111;
+  fra.me.meth = LOCATE_opts___OptionParameter___convert;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/opts.nit:111 */
+  nit_abort("Deferred method called", NULL, LOCATE_opts, 111);
+  stack_frame_head = fra.me.prev;
+  return NIT_NULL;
+}
 void opts___OptionParameter___read_param(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 114;
+  fra.me.line = 113;
   fra.me.meth = LOCATE_opts___OptionParameter___read_param;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -646,35 +647,19 @@ void opts___OptionParameter___read_param(val_t p0, val_t p1){
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
+  /* ./../lib/opts.nit:115 */
   REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[1])(fra.me.REG[1]);
-  /* ./../lib/opts.nit:116 */
   if (UNTAG_Bool(REGB0)) {
+    /* ./../lib/opts.nit:116 */
     fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
     fra.me.REG[2] = CALL_opts___OptionParameter___convert(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
-    /* ./../lib/opts.nit:117 */
     CALL_opts___Option___value__eq(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
-    /* ./../lib/opts.nit:118 */
+    /* ./../lib/opts.nit:117 */
     CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
   }
   stack_frame_head = fra.me.prev;
   return;
 }
-val_t opts___OptionParameter___convert(val_t p0, val_t p1){
-  struct {struct stack_frame_t me;} fra;
-  val_t tmp;
-  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
-  fra.me.file = LOCATE_opts;
-  fra.me.line = 112;
-  fra.me.meth = LOCATE_opts___OptionParameter___convert;
-  fra.me.has_broke = 0;
-  fra.me.REG_size = 0;
-  /* ./../lib/opts.nit:112 */
-  fprintf(stderr, "Deferred method called");
-  fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 112);
-  nit_exit(1);
-  stack_frame_head = fra.me.prev;
-  return NIT_NULL;
-}
 void opts___OptionParameter___init_opt(val_t p0, val_t p1, val_t p2, val_t p3, int* init_table){
   int itpos4 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionParameter].i;
   struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
@@ -682,7 +667,7 @@ void opts___OptionParameter___init_opt(val_t p0, val_t p1, val_t p2, val_t p3, i
   if (init_table[itpos4]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 124;
+  fra.me.line = 123;
   fra.me.meth = LOCATE_opts___OptionParameter___init_opt;
   fra.me.has_broke = 0;
   fra.me.REG_size = 4;
@@ -694,31 +679,12 @@ void opts___OptionParameter___init_opt(val_t p0, val_t p1, val_t p2, val_t p3, i
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
   fra.me.REG[3] = p3;
-  /* ./../lib/opts.nit:124 */
+  /* ./../lib/opts.nit:123 */
   CALL_opts___Option___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], fra.me.REG[2], fra.me.REG[3], init_table);
   stack_frame_head = fra.me.prev;
   init_table[itpos4] = 1;
   return;
 }
-val_t opts___OptionString___convert(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
-  val_t tmp;
-  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
-  fra.me.file = LOCATE_opts;
-  fra.me.line = 133;
-  fra.me.meth = LOCATE_opts___OptionString___convert;
-  fra.me.has_broke = 0;
-  fra.me.REG_size = 2;
-  fra.me.REG[0] = NIT_NULL;
-  fra.me.REG[1] = NIT_NULL;
-  fra.me.REG[0] = p0;
-  fra.me.REG[1] = p1;
-  /* ./../lib/opts.nit:133 */
-  goto label1;
-  label1: while(0);
-  stack_frame_head = fra.me.prev;
-  return fra.me.REG[1];
-}
 void opts___OptionString___init(val_t p0, val_t p1, val_t p2, int* init_table){
   int itpos5 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionString].i;
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
@@ -727,7 +693,7 @@ void opts___OptionString___init(val_t p0, val_t p1, val_t p2, int* init_table){
   if (init_table[itpos5]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 131;
+  fra.me.line = 130;
   fra.me.meth = LOCATE_opts___OptionString___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -737,58 +703,270 @@ void opts___OptionString___init(val_t p0, val_t p1, val_t p2, int* init_table){
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
+  /* ./../lib/opts.nit:130 */
   REGB0 = TAG_Bool(VAL_ISA(fra.me.REG[2], COLOR_Array, ID_Array)) /*cast Array[String]*/;
-  /* ./../lib/opts.nit:131 */
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Cast failed");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 131);
-    nit_exit(1);
+    nit_abort("Cast failed", NULL, LOCATE_opts, 130);
   }
   CALL_opts___OptionParameter___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], NIT_NULL, fra.me.REG[2], init_table);
   stack_frame_head = fra.me.prev;
   init_table[itpos5] = 1;
   return;
 }
-val_t opts___OptionEnum___pretty_default(val_t p0){
-  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+val_t opts___OptionString___convert(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_opts;
+  fra.me.line = 132;
+  fra.me.meth = LOCATE_opts___OptionString___convert;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/opts.nit:132 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[1];
+}
+void opts___OptionEnum___init(val_t p0, val_t p1, val_t p2, val_t p3, val_t p4, int* init_table){
+  int itpos6 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionEnum].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[5];} fra;
   val_t REGB0;
   val_t REGB1;
   val_t REGB2;
   val_t tmp;
-    static val_t once_value_1; /* Once value */
-    static val_t once_value_3; /* Once value */
-    static val_t once_value_5; /* Once value */
+  static val_t once_value_1; /* Once value */
+  static val_t once_value_2; /* Once value */
+  static val_t once_value_3; /* Once value */
+  static val_t once_value_4; /* Once value */
+  if (init_table[itpos6]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 154;
-  fra.me.meth = LOCATE_opts___OptionEnum___pretty_default;
+  fra.me.line = 140;
+  fra.me.meth = LOCATE_opts___OptionEnum___init;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 3;
+  fra.me.REG_size = 6;
   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[0] = p0;
-  fra.me.REG[1] = CALL_opts___Option___default_value(fra.me.REG[0])(fra.me.REG[0]);
-  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
-  /* ./../lib/opts.nit:156 */
-  if (UNTAG_Bool(REGB0)) {
+  fra.me.REG[1] = p1;
+  fra.me.REG[2] = p2;
+  REGB0 = p3;
+  fra.me.REG[3] = p4;
+  /* ./../lib/opts.nit:140 */
+  REGB1 = TAG_Bool(VAL_ISA(fra.me.REG[3], COLOR_Array, ID_Array)) /*cast Array[String]*/;
+  if (UNTAG_Bool(REGB1)) {
   } else {
-    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
-    if (UNTAG_Bool(REGB1)) {
-      REGB1 = TAG_Bool(false);
-      REGB0 = REGB1;
-    } else {
-      REGB1 = TAG_Bool((fra.me.REG[1])==(NIT_NULL));
-      REGB0 = REGB1;
-    /* ./../lib/opts.nit:156 */
-    }
+    nit_abort("Cast failed", NULL, LOCATE_opts, 140);
   }
-  REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
-  if (UNTAG_Bool(REGB0)) {
+  /* ./../lib/standard//collection//array.nit:23 */
+  REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+  }
+  REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+  /* ./../lib/opts.nit:142 */
+  REGB2 = TAG_Int(0);
+  /* ./../lib/standard//kernel.nit:214 */
+  REGB2 = TAG_Bool(UNTAG_Int(REGB1)>UNTAG_Int(REGB2));
+  /* ./../lib/opts.nit:142 */
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Assert failed", NULL, LOCATE_opts, 142);
+  }
+  /* ./../lib/opts.nit:143 */
+  fra.me.REG[4] = CALL_array___Collection___to_a(fra.me.REG[1])(fra.me.REG[1]);
+  ATTR_opts___OptionEnum____enum(fra.me.REG[0]) = fra.me.REG[4];
+  /* ./../lib/opts.nit:144 */
+  REGB2 = TAG_Int(5);
+  fra.me.REG[4] = NEW_Array_array___Array___with_capacity(REGB2);
+  if (!once_value_1) {
+    fra.me.REG[5] = BOX_NativeString("");
+    REGB2 = TAG_Int(0);
+    fra.me.REG[5] = NEW_String_string___String___with_native(fra.me.REG[5], REGB2);
+    once_value_1 = fra.me.REG[5];
+    register_static_object(&once_value_1);
+  } else fra.me.REG[5] = once_value_1;
+  fra.me.REG[5] = fra.me.REG[5];
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[5]);
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[2]);
+  if (!once_value_2) {
+    fra.me.REG[2] = BOX_NativeString(" <");
+    REGB2 = TAG_Int(2);
+    fra.me.REG[2] = NEW_String_string___String___with_native(fra.me.REG[2], REGB2);
+    once_value_2 = fra.me.REG[2];
+    register_static_object(&once_value_2);
+  } else fra.me.REG[2] = once_value_2;
+  fra.me.REG[2] = fra.me.REG[2];
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[2]);
+  if (!once_value_3) {
+    fra.me.REG[2] = BOX_NativeString(", ");
+    REGB2 = TAG_Int(2);
+    fra.me.REG[2] = NEW_String_string___String___with_native(fra.me.REG[2], REGB2);
+    once_value_3 = fra.me.REG[2];
+    register_static_object(&once_value_3);
+  } else fra.me.REG[2] = once_value_3;
+  fra.me.REG[2] = fra.me.REG[2];
+  fra.me.REG[2] = CALL_string___Collection___join(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[2]);
+  if (!once_value_4) {
+    fra.me.REG[2] = BOX_NativeString(">");
+    REGB2 = TAG_Int(1);
+    fra.me.REG[2] = NEW_String_string___String___with_native(fra.me.REG[2], REGB2);
+    once_value_4 = fra.me.REG[2];
+    register_static_object(&once_value_4);
+  } else fra.me.REG[2] = once_value_4;
+  fra.me.REG[2] = fra.me.REG[2];
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[2]);
+  fra.me.REG[4] = CALL_string___Object___to_s(fra.me.REG[4])(fra.me.REG[4]);
+  CALL_opts___OptionParameter___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[4], REGB0, fra.me.REG[3], init_table);
+  stack_frame_head = fra.me.prev;
+  init_table[itpos6] = 1;
+  return;
+}
+val_t opts___OptionEnum___convert(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_opts;
+  fra.me.line = 147;
+  fra.me.meth = LOCATE_opts___OptionEnum___convert;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/opts.nit:149 */
+  REGB0 = TAG_Bool(ATTR_opts___OptionEnum____enum(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_enum", LOCATE_opts, 149);
+  }
+  fra.me.REG[0] = ATTR_opts___OptionEnum____enum(fra.me.REG[0]);
+  REGB0 = CALL_abstract_collection___SequenceRead___index_of(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  /* ./../lib/opts.nit:150 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t opts___OptionEnum___value_name(val_t p0){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} 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_opts;
+  fra.me.line = 153;
+  fra.me.meth = LOCATE_opts___OptionEnum___value_name;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./../lib/opts.nit:153 */
+  REGB0 = TAG_Bool(ATTR_opts___OptionEnum____enum(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_enum", LOCATE_opts, 153);
+  }
+  fra.me.REG[1] = ATTR_opts___OptionEnum____enum(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_opts___Option___value(fra.me.REG[0])(fra.me.REG[0]);
+  /* ./../lib/standard//collection//array.nit:243 */
+  REGB0 = fra.me.REG[0];
+  /* ./../lib/standard//collection//array.nit:245 */
+  REGB1 = TAG_Int(0);
+  /* ./../lib/standard//kernel.nit:213 */
+  REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
+  /* ./../lib/standard//collection//array.nit:245 */
+  if (UNTAG_Bool(REGB1)) {
+    REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 245);
+    }
+    REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+    /* ./../lib/standard//kernel.nit:212 */
+    REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+  } else {
+    /* ./../lib/standard//collection//array.nit:245 */
+    REGB2 = TAG_Bool(false);
+    REGB1 = REGB2;
+  }
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Assert %s  failed", "'index'", LOCATE_array, 245);
+  }
+  /* ./../lib/standard//collection//array.nit:246 */
+  fra.me.REG[1] = ATTR_array___Array____items(fra.me.REG[1]);
+  REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+    nit_abort("Reciever is null", NULL, LOCATE_array, 246);
+  }
+  /* ./../lib/standard//collection//array.nit:654 */
+  fra.me.REG[1] = ((Nit_NativeArray)fra.me.REG[1])->val[UNTAG_Int(REGB0)];
+  /* ./../lib/standard//collection//array.nit:246 */
+  goto label1;
+  label1: while(0);
+  /* ./../lib/opts.nit:153 */
+  goto label2;
+  label2: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[1];
+}
+val_t opts___OptionEnum___pretty_default(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;
+    static val_t once_value_1; /* Once value */
+    static val_t once_value_3; /* Once value */
+    static val_t once_value_5; /* Once value */
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_opts;
+  fra.me.line = 155;
+  fra.me.meth = LOCATE_opts___OptionEnum___pretty_default;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ./../lib/opts.nit:157 */
+  fra.me.REG[1] = CALL_opts___Option___default_value(fra.me.REG[0])(fra.me.REG[0]);
+  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);
+      REGB0 = REGB1;
+    } else {
+      /* ./../lib/standard//kernel.nit:207 */
+      REGB1 = TAG_Bool((fra.me.REG[1])==(NIT_NULL));
+      /* ./../lib/opts.nit:157 */
+      REGB0 = REGB1;
+    }
+  }
+  REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
+  if (UNTAG_Bool(REGB0)) {
+    /* ./../lib/opts.nit:158 */
     REGB0 = TAG_Int(3);
     fra.me.REG[1] = NEW_Array_array___Array___with_capacity(REGB0);
-    /* ./../lib/opts.nit:157 */
     if (!once_value_1) {
       fra.me.REG[2] = BOX_NativeString(" (");
       REGB0 = TAG_Int(2);
@@ -796,62 +974,58 @@ val_t opts___OptionEnum___pretty_default(val_t p0){
       once_value_1 = fra.me.REG[2];
       register_static_object(&once_value_1);
     } else fra.me.REG[2] = once_value_1;
-    array___Array___add(fra.me.REG[1], fra.me.REG[2]);
+    fra.me.REG[2] = fra.me.REG[2];
+    CALL_abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
     REGB0 = TAG_Bool(ATTR_opts___OptionEnum____enum(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
     } else {
-      fprintf(stderr, "Uninitialized attribute %s", "_enum");
-      fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 157);
-      nit_exit(1);
+      nit_abort("Uninitialized attribute %s", "_enum", LOCATE_opts, 158);
     }
     fra.me.REG[2] = ATTR_opts___OptionEnum____enum(fra.me.REG[0]);
     fra.me.REG[0] = CALL_opts___Option___default_value(fra.me.REG[0])(fra.me.REG[0]);
     REGB0 = TAG_Bool((fra.me.REG[0]!=NIT_NULL) && VAL_ISA(fra.me.REG[0], COLOR_Int, ID_Int)) /*cast VALUE*/;
     if (UNTAG_Bool(REGB0)) {
     } else {
-      fprintf(stderr, "Cast failed");
-      fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 157);
-      nit_exit(1);
+      nit_abort("Cast failed", NULL, LOCATE_opts, 158);
     }
+    /* ./../lib/standard//collection//array.nit:243 */
     REGB0 = fra.me.REG[0];
+    /* ./../lib/standard//collection//array.nit:245 */
     REGB1 = TAG_Int(0);
+    /* ./../lib/standard//kernel.nit:213 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:233 */
+    /* ./../lib/standard//collection//array.nit:245 */
     if (UNTAG_Bool(REGB1)) {
       REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
       } else {
-        fprintf(stderr, "Uninitialized attribute %s", "_length");
-        fprintf(stderr, " (%s:%d)\n", LOCATE_array, 233);
-        nit_exit(1);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 245);
       }
       REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[2]);
+      /* ./../lib/standard//kernel.nit:212 */
       REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:233 */
     } else {
+      /* ./../lib/standard//collection//array.nit:245 */
       REGB2 = TAG_Bool(false);
       REGB1 = REGB2;
     }
     if (UNTAG_Bool(REGB1)) {
     } else {
-      fprintf(stderr, "Assert %s  failed", "'index'");
-      fprintf(stderr, " (%s:%d)\n", LOCATE_array, 233);
-      nit_exit(1);
+      nit_abort("Assert %s  failed", "'index'", LOCATE_array, 245);
     }
+    /* ./../lib/standard//collection//array.nit:246 */
     fra.me.REG[2] = ATTR_array___Array____items(fra.me.REG[2]);
     REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-    /* ./../lib/standard//collection//array.nit:234 */
     if (UNTAG_Bool(REGB1)) {
-      fprintf(stderr, "Reciever is null");
-      fprintf(stderr, " (%s:%d)\n", LOCATE_array, 234);
-      nit_exit(1);
+      nit_abort("Reciever is null", NULL, LOCATE_array, 246);
     }
+    /* ./../lib/standard//collection//array.nit:654 */
     fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
-    /* ./../lib/standard//collection//array.nit:234 */
+    /* ./../lib/standard//collection//array.nit:246 */
     goto label2;
     label2: while(0);
-    /* ./../lib/opts.nit:157 */
-    array___Array___add(fra.me.REG[1], fra.me.REG[2]);
+    /* ./../lib/opts.nit:158 */
+    CALL_abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
     if (!once_value_3) {
       fra.me.REG[2] = BOX_NativeString(")");
       REGB0 = TAG_Int(1);
@@ -859,11 +1033,12 @@ val_t opts___OptionEnum___pretty_default(val_t p0){
       once_value_3 = fra.me.REG[2];
       register_static_object(&once_value_3);
     } else fra.me.REG[2] = once_value_3;
-    array___Array___add(fra.me.REG[1], fra.me.REG[2]);
+    fra.me.REG[2] = fra.me.REG[2];
+    CALL_abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
     fra.me.REG[1] = CALL_string___Object___to_s(fra.me.REG[1])(fra.me.REG[1]);
     goto label4;
   } else {
-    /* ./../lib/opts.nit:159 */
+    /* ./../lib/opts.nit:160 */
     if (!once_value_5) {
       fra.me.REG[2] = BOX_NativeString("");
       REGB0 = TAG_Int(0);
@@ -871,6 +1046,7 @@ val_t opts___OptionEnum___pretty_default(val_t p0){
       once_value_5 = fra.me.REG[2];
       register_static_object(&once_value_5);
     } else fra.me.REG[2] = once_value_5;
+    fra.me.REG[2] = fra.me.REG[2];
     fra.me.REG[1] = fra.me.REG[2];
     goto label4;
   }
@@ -878,135 +1054,35 @@ val_t opts___OptionEnum___pretty_default(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[1];
 }
-val_t opts___OptionEnum___convert(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
-  val_t REGB0;
-  val_t tmp;
-  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
-  fra.me.file = LOCATE_opts;
-  fra.me.line = 148;
-  fra.me.meth = LOCATE_opts___OptionEnum___convert;
-  fra.me.has_broke = 0;
-  fra.me.REG_size = 2;
-  fra.me.REG[0] = NIT_NULL;
-  fra.me.REG[1] = NIT_NULL;
-  fra.me.REG[0] = p0;
-  fra.me.REG[1] = p1;
-  REGB0 = TAG_Bool(ATTR_opts___OptionEnum____enum(fra.me.REG[0])!=NIT_NULL);
-  /* ./../lib/opts.nit:150 */
-  if (UNTAG_Bool(REGB0)) {
-  } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_enum");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 150);
-    nit_exit(1);
-  }
-  fra.me.REG[0] = ATTR_opts___OptionEnum____enum(fra.me.REG[0]);
-  REGB0 = CALL_abstract_collection___SequenceRead___index_of(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
-  /* ./../lib/opts.nit:151 */
-  goto label1;
-  label1: while(0);
-  stack_frame_head = fra.me.prev;
-  return REGB0;
-}
-void opts___OptionEnum___init(val_t p0, val_t p1, val_t p2, val_t p3, val_t p4, int* init_table){
-  int itpos6 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionEnum].i;
-  struct {struct stack_frame_t me; val_t MORE_REG[5];} fra;
+void opts___OptionInt___init(val_t p0, val_t p1, val_t p2, val_t p3, int* init_table){
+  int itpos7 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionInt].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t REGB1;
-  val_t REGB2;
   val_t tmp;
-  static val_t once_value_1; /* Once value */
-  static val_t once_value_2; /* Once value */
-  static val_t once_value_3; /* Once value */
-  static val_t once_value_4; /* Once value */
-  if (init_table[itpos6]) return;
+  if (init_table[itpos7]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 141;
-  fra.me.meth = LOCATE_opts___OptionEnum___init;
+  fra.me.line = 169;
+  fra.me.meth = LOCATE_opts___OptionInt___init;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 6;
+  fra.me.REG_size = 3;
   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[0] = p0;
   fra.me.REG[1] = p1;
-  fra.me.REG[2] = p2;
-  REGB0 = p3;
-  fra.me.REG[3] = p4;
-  REGB1 = TAG_Bool(VAL_ISA(fra.me.REG[3], COLOR_Array, ID_Array)) /*cast Array[String]*/;
-  /* ./../lib/opts.nit:141 */
-  if (UNTAG_Bool(REGB1)) {
-  } else {
-    fprintf(stderr, "Cast failed");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 141);
-    nit_exit(1);
-  }
-  REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
-  /* ./../lib/standard//collection//array.nit:23 */
+  REGB0 = p2;
+  fra.me.REG[2] = p3;
+  /* ./../lib/opts.nit:169 */
+  REGB1 = TAG_Bool(VAL_ISA(fra.me.REG[2], COLOR_Array, ID_Array)) /*cast Array[String]*/;
   if (UNTAG_Bool(REGB1)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_length");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_array, 23);
-    nit_exit(1);
-  }
-  REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
-  REGB2 = TAG_Int(0);
-  REGB2 = TAG_Bool(UNTAG_Int(REGB1)>UNTAG_Int(REGB2));
-  /* ./../lib/opts.nit:143 */
-  if (UNTAG_Bool(REGB2)) {
-  } else {
-    fprintf(stderr, "Assert failed");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 143);
-    nit_exit(1);
+    nit_abort("Cast failed", NULL, LOCATE_opts, 169);
   }
-  fra.me.REG[4] = CALL_array___Collection___to_a(fra.me.REG[1])(fra.me.REG[1]);
-  /* ./../lib/opts.nit:144 */
-  ATTR_opts___OptionEnum____enum(fra.me.REG[0]) = fra.me.REG[4];
-  REGB2 = TAG_Int(5);
-  fra.me.REG[4] = NEW_Array_array___Array___with_capacity(REGB2);
-  /* ./../lib/opts.nit:145 */
-  if (!once_value_1) {
-    fra.me.REG[5] = BOX_NativeString("");
-    REGB2 = TAG_Int(0);
-    fra.me.REG[5] = NEW_String_string___String___with_native(fra.me.REG[5], REGB2);
-    once_value_1 = fra.me.REG[5];
-    register_static_object(&once_value_1);
-  } else fra.me.REG[5] = once_value_1;
-  array___Array___add(fra.me.REG[4], fra.me.REG[5]);
-  array___Array___add(fra.me.REG[4], fra.me.REG[2]);
-  if (!once_value_2) {
-    fra.me.REG[2] = BOX_NativeString(" <");
-    REGB2 = TAG_Int(2);
-    fra.me.REG[2] = NEW_String_string___String___with_native(fra.me.REG[2], REGB2);
-    once_value_2 = fra.me.REG[2];
-    register_static_object(&once_value_2);
-  } else fra.me.REG[2] = once_value_2;
-  array___Array___add(fra.me.REG[4], fra.me.REG[2]);
-  if (!once_value_3) {
-    fra.me.REG[2] = BOX_NativeString(", ");
-    REGB2 = TAG_Int(2);
-    fra.me.REG[2] = NEW_String_string___String___with_native(fra.me.REG[2], REGB2);
-    once_value_3 = fra.me.REG[2];
-    register_static_object(&once_value_3);
-  } else fra.me.REG[2] = once_value_3;
-  fra.me.REG[2] = CALL_string___Collection___join(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
-  array___Array___add(fra.me.REG[4], fra.me.REG[2]);
-  if (!once_value_4) {
-    fra.me.REG[2] = BOX_NativeString(">");
-    REGB2 = TAG_Int(1);
-    fra.me.REG[2] = NEW_String_string___String___with_native(fra.me.REG[2], REGB2);
-    once_value_4 = fra.me.REG[2];
-    register_static_object(&once_value_4);
-  } else fra.me.REG[2] = once_value_4;
-  array___Array___add(fra.me.REG[4], fra.me.REG[2]);
-  fra.me.REG[4] = CALL_string___Object___to_s(fra.me.REG[4])(fra.me.REG[4]);
-  CALL_opts___OptionParameter___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[4], REGB0, fra.me.REG[3], init_table);
+  CALL_opts___OptionParameter___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], REGB0, fra.me.REG[2], init_table);
   stack_frame_head = fra.me.prev;
-  init_table[itpos6] = 1;
+  init_table[itpos7] = 1;
   return;
 }
 val_t opts___OptionInt___convert(val_t p0, val_t p1){
@@ -1015,7 +1091,7 @@ val_t opts___OptionInt___convert(val_t p0, val_t p1){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 170;
+  fra.me.line = 171;
   fra.me.meth = LOCATE_opts___OptionInt___convert;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -1023,44 +1099,51 @@ val_t opts___OptionInt___convert(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
+  /* ./../lib/opts.nit:171 */
   REGB0 = CALL_string___AbstractString___to_i(fra.me.REG[1])(fra.me.REG[1]);
-  /* ./../lib/opts.nit:170 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
-void opts___OptionInt___init(val_t p0, val_t p1, val_t p2, val_t p3, int* init_table){
-  int itpos7 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionInt].i;
-  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+void opts___OptionArray___init(val_t p0, val_t p1, val_t p2, int* init_table){
+  int itpos8 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionArray].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
   val_t REGB0;
-  val_t REGB1;
   val_t tmp;
-  if (init_table[itpos7]) return;
+  if (init_table[itpos8]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 168;
-  fra.me.meth = LOCATE_opts___OptionInt___init;
+  fra.me.line = 178;
+  fra.me.meth = LOCATE_opts___OptionArray___init;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 3;
+  fra.me.REG_size = 4;
   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;
   fra.me.REG[1] = p1;
-  REGB0 = p2;
-  fra.me.REG[2] = p3;
-  REGB1 = TAG_Bool(VAL_ISA(fra.me.REG[2], COLOR_Array, ID_Array)) /*cast Array[String]*/;
-  /* ./../lib/opts.nit:168 */
-  if (UNTAG_Bool(REGB1)) {
+  fra.me.REG[2] = p2;
+  /* ./../lib/opts.nit:178 */
+  REGB0 = TAG_Bool(VAL_ISA(fra.me.REG[2], COLOR_Array, ID_Array)) /*cast Array[String]*/;
+  if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Cast failed");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 168);
-    nit_exit(1);
+    nit_abort("Cast failed", NULL, LOCATE_opts, 178);
   }
-  CALL_opts___OptionParameter___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], REGB0, fra.me.REG[2], init_table);
+  /* ./../lib/opts.nit:180 */
+  fra.me.REG[3] = NEW_Array_array___Array___init();
+  ATTR_opts___OptionArray____values(fra.me.REG[0]) = fra.me.REG[3];
+  /* ./../lib/opts.nit:181 */
+  REGB0 = TAG_Bool(ATTR_opts___OptionArray____values(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_values", LOCATE_opts, 181);
+  }
+  fra.me.REG[3] = ATTR_opts___OptionArray____values(fra.me.REG[0]);
+  CALL_opts___OptionParameter___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], fra.me.REG[3], fra.me.REG[2], init_table);
   stack_frame_head = fra.me.prev;
-  init_table[itpos7] = 1;
+  init_table[itpos8] = 1;
   return;
 }
 val_t opts___OptionArray___convert(val_t p0, val_t p1){
@@ -1069,7 +1152,7 @@ val_t opts___OptionArray___convert(val_t p0, val_t p1){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 184;
+  fra.me.line = 185;
   fra.me.meth = LOCATE_opts___OptionArray___convert;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -1078,23 +1161,19 @@ val_t opts___OptionArray___convert(val_t p0, val_t p1){
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
+  /* ./../lib/opts.nit:187 */
   REGB0 = TAG_Bool(ATTR_opts___OptionArray____values(fra.me.REG[0])!=NIT_NULL);
-  /* ./../lib/opts.nit:186 */
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_values");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 186);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_values", LOCATE_opts, 187);
   }
   fra.me.REG[2] = ATTR_opts___OptionArray____values(fra.me.REG[0]);
-  array___Array___add(fra.me.REG[2], fra.me.REG[1]);
+  CALL_abstract_collection___SimpleCollection___add(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+  /* ./../lib/opts.nit:188 */
   REGB0 = TAG_Bool(ATTR_opts___OptionArray____values(fra.me.REG[0])!=NIT_NULL);
-  /* ./../lib/opts.nit:187 */
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_values");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 187);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_values", LOCATE_opts, 188);
   }
   fra.me.REG[0] = ATTR_opts___OptionArray____values(fra.me.REG[0]);
   goto label1;
@@ -1102,69 +1181,23 @@ val_t opts___OptionArray___convert(val_t p0, val_t p1){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
-void opts___OptionArray___init(val_t p0, val_t p1, val_t p2, int* init_table){
-  int itpos8 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_OptionArray].i;
-  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
-  val_t REGB0;
-  val_t tmp;
-  if (init_table[itpos8]) return;
-  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
-  fra.me.file = LOCATE_opts;
-  fra.me.line = 177;
-  fra.me.meth = LOCATE_opts___OptionArray___init;
-  fra.me.has_broke = 0;
-  fra.me.REG_size = 4;
-  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;
-  fra.me.REG[1] = p1;
-  fra.me.REG[2] = p2;
-  REGB0 = TAG_Bool(VAL_ISA(fra.me.REG[2], COLOR_Array, ID_Array)) /*cast Array[String]*/;
-  /* ./../lib/opts.nit:177 */
-  if (UNTAG_Bool(REGB0)) {
-  } else {
-    fprintf(stderr, "Cast failed");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 177);
-    nit_exit(1);
-  }
-  fra.me.REG[3] = NEW_Array_array___Array___init();
-  /* ./../lib/opts.nit:179 */
-  ATTR_opts___OptionArray____values(fra.me.REG[0]) = fra.me.REG[3];
-  REGB0 = TAG_Bool(ATTR_opts___OptionArray____values(fra.me.REG[0])!=NIT_NULL);
-  /* ./../lib/opts.nit:180 */
-  if (UNTAG_Bool(REGB0)) {
-  } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_values");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 180);
-    nit_exit(1);
-  }
-  fra.me.REG[3] = ATTR_opts___OptionArray____values(fra.me.REG[0]);
-  CALL_opts___OptionParameter___init_opt(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], fra.me.REG[3], fra.me.REG[2], init_table);
-  stack_frame_head = fra.me.prev;
-  init_table[itpos8] = 1;
-  return;
-}
 val_t opts___OptionContext___options(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 192;
+  fra.me.line = 193;
   fra.me.meth = LOCATE_opts___OptionContext___options;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
+  /* ./../lib/opts.nit:193 */
   REGB0 = TAG_Bool(ATTR_opts___OptionContext____options(fra.me.REG[0])!=NIT_NULL);
-  /* ./../lib/opts.nit:192 */
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_options");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 192);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_options", LOCATE_opts, 193);
   }
   fra.me.REG[0] = ATTR_opts___OptionContext____options(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
@@ -1176,120 +1209,214 @@ val_t opts___OptionContext___rest(val_t p0){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 193;
+  fra.me.line = 194;
   fra.me.meth = LOCATE_opts___OptionContext___rest;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
+  /* ./../lib/opts.nit:194 */
   REGB0 = TAG_Bool(ATTR_opts___OptionContext____rest(fra.me.REG[0])!=NIT_NULL);
-  /* ./../lib/opts.nit:193 */
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_rest");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 193);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_rest", LOCATE_opts, 194);
   }
   fra.me.REG[0] = ATTR_opts___OptionContext____rest(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
 void opts___OptionContext___usage(val_t p0){
-  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
+  struct {struct stack_frame_t me; val_t MORE_REG[5];} fra;
   val_t REGB0;
   val_t REGB1;
   val_t REGB2;
   val_t REGB3;
+  val_t REGB4;
+  val_t REGB5;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 197;
+  fra.me.line = 198;
   fra.me.meth = LOCATE_opts___OptionContext___usage;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 4;
+  fra.me.REG_size = 6;
   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[0] = p0;
+  /* ./../lib/opts.nit:200 */
   REGB0 = TAG_Int(1);
+  /* ./../lib/opts.nit:201 */
   REGB1 = TAG_Bool(ATTR_opts___OptionContext____options(fra.me.REG[0])!=NIT_NULL);
-  /* ./../lib/opts.nit:200 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_options");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 200);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_options", LOCATE_opts, 201);
   }
   fra.me.REG[1] = ATTR_opts___OptionContext____options(fra.me.REG[0]);
-  fra.me.REG[1] = CALL_abstract_collection___Collection___iterator(fra.me.REG[1])(fra.me.REG[1]);
+  /* ./../lib/standard//collection//array.nit:234 */
+  REGB1 = TAG_Int(0);
+  /* ./../lib/standard//collection//array.nit:235 */
+  REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+  }
+  REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+  /* ./../lib/standard//collection//array.nit:236 */
+  fra.me.REG[2] = ATTR_array___Array____items(fra.me.REG[1]);
+  /* ./../lib/standard//collection//array.nit:237 */
   while(1) {
-    REGB1 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[1])(fra.me.REG[1]);
-    if (UNTAG_Bool(REGB1)) {
-      fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
-      REGB1 = TAG_Int(3);
-      fra.me.REG[2] = CALL_opts___Option___names(fra.me.REG[2])(fra.me.REG[2]);
-      fra.me.REG[2] = CALL_abstract_collection___Collection___iterator(fra.me.REG[2])(fra.me.REG[2]);
+    /* ./../lib/standard//collection//array.nit:23 */
+    REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+    }
+    REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+    /* ./../lib/standard//kernel.nit:212 */
+    REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
+    /* ./../lib/standard//collection//array.nit:237 */
+    if (UNTAG_Bool(REGB2)) {
+      /* ./../lib/standard//collection//array.nit:238 */
+      REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      if (UNTAG_Bool(REGB2)) {
+        nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+      }
+      /* ./../lib/standard//collection//array.nit:654 */
+      fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB1)];
       /* ./../lib/opts.nit:202 */
+      REGB2 = TAG_Int(3);
+      /* ./../lib/opts.nit:203 */
+      fra.me.REG[3] = CALL_opts___Option___names(fra.me.REG[3])(fra.me.REG[3]);
+      /* ./../lib/standard//collection//array.nit:234 */
+      REGB3 = TAG_Int(0);
+      /* ./../lib/standard//collection//array.nit:235 */
+      REGB4 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
+      if (UNTAG_Bool(REGB4)) {
+      } else {
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+      }
+      REGB4 = ATTR_array___AbstractArrayRead____length(fra.me.REG[3]);
+      /* ./../lib/standard//collection//array.nit:236 */
+      fra.me.REG[4] = ATTR_array___Array____items(fra.me.REG[3]);
+      /* ./../lib/standard//collection//array.nit:237 */
       while(1) {
-        REGB2 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[2])(fra.me.REG[2]);
-        if (UNTAG_Bool(REGB2)) {
-          fra.me.REG[3] = CALL_abstract_collection___Iterator___item(fra.me.REG[2])(fra.me.REG[2]);
-          REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
+        /* ./../lib/standard//collection//array.nit:23 */
+        REGB4 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
+        if (UNTAG_Bool(REGB4)) {
+        } else {
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+        }
+        REGB4 = ATTR_array___AbstractArrayRead____length(fra.me.REG[3]);
+        /* ./../lib/standard//kernel.nit:212 */
+        REGB4 = TAG_Bool(UNTAG_Int(REGB3)<UNTAG_Int(REGB4));
+        /* ./../lib/standard//collection//array.nit:237 */
+        if (UNTAG_Bool(REGB4)) {
+          /* ./../lib/standard//collection//array.nit:238 */
+          REGB4 = TAG_Bool(fra.me.REG[4]==NIT_NULL);
+          if (UNTAG_Bool(REGB4)) {
+            nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+          }
+          /* ./../lib/standard//collection//array.nit:654 */
+          fra.me.REG[5] = ((Nit_NativeArray)fra.me.REG[4])->val[UNTAG_Int(REGB3)];
           /* ./../lib/standard//collection//array.nit:23 */
-          if (UNTAG_Bool(REGB2)) {
+          REGB4 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[5])!=NIT_NULL);
+          if (UNTAG_Bool(REGB4)) {
           } else {
-            fprintf(stderr, "Uninitialized attribute %s", "_length");
-            fprintf(stderr, " (%s:%d)\n", LOCATE_array, 23);
-            nit_exit(1);
+            nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
           }
-          REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[3]);
-          REGB3 = TAG_Int(2);
-          REGB3 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB3));
-          REGB3 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB3));
-          REGB1 = REGB3;
-        /* ./../lib/opts.nit:203 */
+          REGB4 = ATTR_array___AbstractArrayRead____length(fra.me.REG[5]);
+          /* ./../lib/opts.nit:204 */
+          REGB5 = TAG_Int(2);
+          /* ./../lib/standard//kernel.nit:215 */
+          REGB5 = TAG_Int(UNTAG_Int(REGB4)+UNTAG_Int(REGB5));
+          REGB5 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB5));
+          /* ./../lib/opts.nit:204 */
+          REGB2 = REGB5;
+          /* ./../lib/standard//collection//array.nit:239 */
+          REGB5 = TAG_Int(1);
+          /* ./../lib/standard//kernel.nit:215 */
+          REGB5 = TAG_Int(UNTAG_Int(REGB3)+UNTAG_Int(REGB5));
+          /* ./../lib/standard//collection//array.nit:239 */
+          REGB3 = REGB5;
         } else {
-          /* ./../lib/opts.nit:202 */
+          /* ./../lib/standard//collection//array.nit:237 */
           goto label1;
         }
-        CALL_abstract_collection___Iterator___next(fra.me.REG[2])(fra.me.REG[2]);
       }
       label1: while(0);
-      REGB3 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-      /* ./../lib/opts.nit:205 */
+      /* ./../lib/standard//kernel.nit:212 */
+      REGB3 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB2));
+      /* ./../lib/opts.nit:206 */
       if (UNTAG_Bool(REGB3)) {
-        REGB0 = REGB1;
+        REGB0 = REGB2;
       }
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB2 = TAG_Int(1);
+      /* ./../lib/standard//kernel.nit:215 */
+      REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB1 = REGB2;
     } else {
-      /* ./../lib/opts.nit:200 */
+      /* ./../lib/standard//collection//array.nit:237 */
       goto label2;
     }
-    CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
   }
   label2: while(0);
+  /* ./../lib/opts.nit:209 */
   REGB1 = TAG_Bool(ATTR_opts___OptionContext____options(fra.me.REG[0])!=NIT_NULL);
-  /* ./../lib/opts.nit:208 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_options");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 208);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_options", LOCATE_opts, 209);
   }
-  fra.me.REG[1] = ATTR_opts___OptionContext____options(fra.me.REG[0]);
-  fra.me.REG[1] = CALL_abstract_collection___Collection___iterator(fra.me.REG[1])(fra.me.REG[1]);
+  fra.me.REG[2] = ATTR_opts___OptionContext____options(fra.me.REG[0]);
+  /* ./../lib/standard//collection//array.nit:234 */
+  REGB1 = TAG_Int(0);
+  /* ./../lib/standard//collection//array.nit:235 */
+  REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+  }
+  REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[2]);
+  /* ./../lib/standard//collection//array.nit:236 */
+  fra.me.REG[1] = ATTR_array___Array____items(fra.me.REG[2]);
+  /* ./../lib/standard//collection//array.nit:237 */
   while(1) {
-    REGB1 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[1])(fra.me.REG[1]);
-    if (UNTAG_Bool(REGB1)) {
-      fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
-      fra.me.REG[2] = CALL_opts___Option___pretty(fra.me.REG[2])(fra.me.REG[2], REGB0);
-      /* ./../lib/opts.nit:209 */
-      CALL_file___Object___print(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
+    /* ./../lib/standard//collection//array.nit:23 */
+    REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+    }
+    REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[2]);
+    /* ./../lib/standard//kernel.nit:212 */
+    REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
+    /* ./../lib/standard//collection//array.nit:237 */
+    if (UNTAG_Bool(REGB2)) {
+      /* ./../lib/standard//collection//array.nit:238 */
+      REGB2 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+      if (UNTAG_Bool(REGB2)) {
+        nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+      }
+      /* ./../lib/standard//collection//array.nit:654 */
+      fra.me.REG[4] = ((Nit_NativeArray)fra.me.REG[1])->val[UNTAG_Int(REGB1)];
+      /* ./../lib/opts.nit:210 */
+      fra.me.REG[4] = CALL_opts___Option___pretty(fra.me.REG[4])(fra.me.REG[4], REGB0);
+      CALL_file___Object___print(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[4]);
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB2 = TAG_Int(1);
+      /* ./../lib/standard//kernel.nit:215 */
+      REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB1 = REGB2;
     } else {
-      /* ./../lib/opts.nit:208 */
+      /* ./../lib/standard//collection//array.nit:237 */
       goto label3;
     }
-    CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
   }
   label3: while(0);
   stack_frame_head = fra.me.prev;
@@ -1300,7 +1427,7 @@ void opts___OptionContext___parse(val_t p0, val_t p1){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 213;
+  fra.me.line = 214;
   fra.me.meth = LOCATE_opts___OptionContext___parse;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -1308,8 +1435,9 @@ void opts___OptionContext___parse(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  fra.me.REG[1] = CALL_abstract_collection___Collection___iterator(fra.me.REG[1])(fra.me.REG[1]);
   /* ./../lib/opts.nit:217 */
+  fra.me.REG[1] = CALL_abstract_collection___Collection___iterator(fra.me.REG[1])(fra.me.REG[1]);
+  /* ./../lib/opts.nit:218 */
   CALL_opts___OptionContext___parse_intern(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
   stack_frame_head = fra.me.prev;
   return;
@@ -1323,7 +1451,7 @@ void opts___OptionContext___parse_intern(val_t p0, val_t p1){
       static val_t once_value_1; /* Once value */
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 220;
+  fra.me.line = 221;
   fra.me.meth = LOCATE_opts___OptionContext___parse_intern;
   fra.me.has_broke = 0;
   fra.me.REG_size = 5;
@@ -1334,19 +1462,18 @@ void opts___OptionContext___parse_intern(val_t p0, val_t p1){
   fra.me.REG[4] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  REGB0 = TAG_Bool(true);
   /* ./../lib/opts.nit:223 */
+  REGB0 = TAG_Bool(true);
+  /* ./../lib/opts.nit:224 */
   CALL_opts___OptionContext___build(fra.me.REG[0])(fra.me.REG[0]);
+  /* ./../lib/opts.nit:225 */
   REGB1 = TAG_Bool(ATTR_opts___OptionContext____rest(fra.me.REG[0])!=NIT_NULL);
-  /* ./../lib/opts.nit:224 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_rest");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 224);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_rest", LOCATE_opts, 225);
   }
   fra.me.REG[2] = ATTR_opts___OptionContext____rest(fra.me.REG[0]);
-  /* ./../lib/opts.nit:226 */
+  /* ./../lib/opts.nit:227 */
   while(1) {
     if (UNTAG_Bool(REGB0)) {
       REGB1 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[1])(fra.me.REG[1]);
@@ -1355,8 +1482,9 @@ void opts___OptionContext___parse_intern(val_t p0, val_t p1){
       REGB1 = REGB2;
     }
     if (UNTAG_Bool(REGB1)) {
-      fra.me.REG[3] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
       /* ./../lib/opts.nit:228 */
+      fra.me.REG[3] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
+      /* ./../lib/opts.nit:229 */
       if (!once_value_1) {
         fra.me.REG[4] = BOX_NativeString("--");
         REGB1 = TAG_Int(2);
@@ -1364,6 +1492,7 @@ void opts___OptionContext___parse_intern(val_t p0, val_t p1){
         once_value_1 = fra.me.REG[4];
         register_static_object(&once_value_1);
       } else fra.me.REG[4] = once_value_1;
+      fra.me.REG[4] = fra.me.REG[4];
       REGB1 = TAG_Bool(IS_EQUAL_OO(fra.me.REG[3],fra.me.REG[4]));
       if (UNTAG_Bool(REGB1)) {
       } else {
@@ -1371,50 +1500,46 @@ void opts___OptionContext___parse_intern(val_t p0, val_t p1){
         REGB1 = REGB2;
       }
       if (UNTAG_Bool(REGB1)) {
-        /* ./../lib/opts.nit:229 */
+        /* ./../lib/opts.nit:230 */
         CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
+        /* ./../lib/opts.nit:231 */
         fra.me.REG[4] = CALL_array___Iterator___to_a(fra.me.REG[1])(fra.me.REG[1]);
-        /* ./../lib/opts.nit:230 */
         CALL_abstract_collection___SimpleCollection___add_all(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[4]);
+        /* ./../lib/opts.nit:232 */
         REGB1 = TAG_Bool(false);
         REGB0 = REGB1;
-      /* ./../lib/opts.nit:231 */
       } else {
+        /* ./../lib/opts.nit:234 */
         REGB1 = TAG_Bool(ATTR_opts___OptionContext____optmap(fra.me.REG[0])!=NIT_NULL);
-        /* ./../lib/opts.nit:233 */
         if (UNTAG_Bool(REGB1)) {
         } else {
-          fprintf(stderr, "Uninitialized attribute %s", "_optmap");
-          fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 233);
-          nit_exit(1);
+          nit_abort("Uninitialized attribute %s", "_optmap", LOCATE_opts, 234);
         }
         fra.me.REG[4] = ATTR_opts___OptionContext____optmap(fra.me.REG[0]);
         REGB1 = CALL_abstract_collection___MapRead___has_key(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[3]);
         if (UNTAG_Bool(REGB1)) {
+          /* ./../lib/opts.nit:235 */
           REGB1 = TAG_Bool(ATTR_opts___OptionContext____optmap(fra.me.REG[0])!=NIT_NULL);
-          /* ./../lib/opts.nit:234 */
           if (UNTAG_Bool(REGB1)) {
           } else {
-            fprintf(stderr, "Uninitialized attribute %s", "_optmap");
-            fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 234);
-            nit_exit(1);
+            nit_abort("Uninitialized attribute %s", "_optmap", LOCATE_opts, 235);
           }
           fra.me.REG[4] = ATTR_opts___OptionContext____optmap(fra.me.REG[0]);
           fra.me.REG[3] = CALL_abstract_collection___MapRead_____bra(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[3]);
-          /* ./../lib/opts.nit:235 */
-          CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
           /* ./../lib/opts.nit:236 */
+          CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
+          /* ./../lib/opts.nit:237 */
           CALL_opts___Option___read_param(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[1]);
         } else {
-          fra.me.REG[3] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
-          /* ./../lib/opts.nit:238 */
-          array___Array___add(fra.me.REG[2], fra.me.REG[3]);
           /* ./../lib/opts.nit:239 */
+          fra.me.REG[3] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
+          CALL_abstract_collection___SimpleCollection___add(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[3]);
+          /* ./../lib/opts.nit:240 */
           CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
         }
       }
     } else {
-      /* ./../lib/opts.nit:226 */
+      /* ./../lib/opts.nit:227 */
       goto label2;
     }
   }
@@ -1423,50 +1548,78 @@ void opts___OptionContext___parse_intern(val_t p0, val_t p1){
   return;
 }
 void opts___OptionContext___add_option(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
+  struct {struct stack_frame_t me; val_t MORE_REG[4];} fra;
   val_t REGB0;
+  val_t REGB1;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 245;
+  fra.me.line = 246;
   fra.me.meth = LOCATE_opts___OptionContext___add_option;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 4;
+  fra.me.REG_size = 5;
   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[0] = p0;
   fra.me.REG[1] = p1;
+  /* ./../lib/opts.nit:246 */
   REGB0 = TAG_Bool(VAL_ISA(fra.me.REG[1], COLOR_Array, ID_Array)) /*cast Array[Option]*/;
-  /* ./../lib/opts.nit:245 */
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Cast failed");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 245);
-    nit_exit(1);
+    nit_abort("Cast failed", NULL, LOCATE_opts, 246);
   }
-  fra.me.REG[1] = CALL_abstract_collection___Collection___iterator(fra.me.REG[1])(fra.me.REG[1]);
-  /* ./../lib/opts.nit:247 */
+  /* ./../lib/standard//collection//array.nit:234 */
+  REGB0 = TAG_Int(0);
+  /* ./../lib/standard//collection//array.nit:235 */
+  REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+  }
+  REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+  /* ./../lib/standard//collection//array.nit:236 */
+  fra.me.REG[2] = ATTR_array___Array____items(fra.me.REG[1]);
+  /* ./../lib/standard//collection//array.nit:237 */
   while(1) {
-    REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[1])(fra.me.REG[1]);
-    if (UNTAG_Bool(REGB0)) {
-      fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
-      REGB0 = TAG_Bool(ATTR_opts___OptionContext____options(fra.me.REG[0])!=NIT_NULL);
-      /* ./../lib/opts.nit:248 */
-      if (UNTAG_Bool(REGB0)) {
+    /* ./../lib/standard//collection//array.nit:23 */
+    REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+    }
+    REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+    /* ./../lib/standard//kernel.nit:212 */
+    REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+    /* ./../lib/standard//collection//array.nit:237 */
+    if (UNTAG_Bool(REGB1)) {
+      /* ./../lib/standard//collection//array.nit:238 */
+      REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
+        nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+      }
+      /* ./../lib/standard//collection//array.nit:654 */
+      fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
+      /* ./../lib/opts.nit:249 */
+      REGB1 = TAG_Bool(ATTR_opts___OptionContext____options(fra.me.REG[0])!=NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
       } else {
-        fprintf(stderr, "Uninitialized attribute %s", "_options");
-        fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 248);
-        nit_exit(1);
+        nit_abort("Uninitialized attribute %s", "_options", LOCATE_opts, 249);
       }
-      fra.me.REG[3] = ATTR_opts___OptionContext____options(fra.me.REG[0]);
-      array___Array___add(fra.me.REG[3], fra.me.REG[2]);
+      fra.me.REG[4] = ATTR_opts___OptionContext____options(fra.me.REG[0]);
+      CALL_abstract_collection___SimpleCollection___add(fra.me.REG[4])(fra.me.REG[4], fra.me.REG[3]);
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB1 = TAG_Int(1);
+      /* ./../lib/standard//kernel.nit:215 */
+      REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB0 = REGB1;
     } else {
-      /* ./../lib/opts.nit:247 */
+      /* ./../lib/standard//collection//array.nit:237 */
       goto label1;
     }
-    CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
   }
   label1: while(0);
   stack_frame_head = fra.me.prev;
@@ -1479,86 +1632,148 @@ void opts___OptionContext___init(val_t p0, int* init_table){
   if (init_table[itpos9]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_opts;
-  fra.me.line = 252;
+  fra.me.line = 253;
   fra.me.meth = LOCATE_opts___OptionContext___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
+  /* ./../lib/opts.nit:255 */
   fra.me.REG[1] = NEW_Array_array___Array___init();
-  /* ./../lib/opts.nit:254 */
   ATTR_opts___OptionContext____options(fra.me.REG[0]) = fra.me.REG[1];
+  /* ./../lib/opts.nit:256 */
   fra.me.REG[1] = NEW_HashMap_hash_collection___HashMap___init();
-  /* ./../lib/opts.nit:255 */
   ATTR_opts___OptionContext____optmap(fra.me.REG[0]) = fra.me.REG[1];
+  /* ./../lib/opts.nit:257 */
   fra.me.REG[1] = NEW_Array_array___Array___init();
-  /* ./../lib/opts.nit:256 */
   ATTR_opts___OptionContext____rest(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   init_table[itpos9] = 1;
   return;
 }
 void opts___OptionContext___build(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[7];} 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_opts;
-  fra.me.line = 259;
+  fra.me.line = 260;
   fra.me.meth = LOCATE_opts___OptionContext___build;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 6;
+  fra.me.REG_size = 8;
   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[7] = NIT_NULL;
   fra.me.REG[0] = p0;
+  /* ./../lib/opts.nit:262 */
   REGB0 = TAG_Bool(ATTR_opts___OptionContext____options(fra.me.REG[0])!=NIT_NULL);
-  /* ./../lib/opts.nit:261 */
   if (UNTAG_Bool(REGB0)) {
   } else {
-    fprintf(stderr, "Uninitialized attribute %s", "_options");
-    fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 261);
-    nit_exit(1);
+    nit_abort("Uninitialized attribute %s", "_options", LOCATE_opts, 262);
   }
   fra.me.REG[1] = ATTR_opts___OptionContext____options(fra.me.REG[0]);
-  fra.me.REG[1] = CALL_abstract_collection___Collection___iterator(fra.me.REG[1])(fra.me.REG[1]);
+  /* ./../lib/standard//collection//array.nit:234 */
+  REGB0 = TAG_Int(0);
+  /* ./../lib/standard//collection//array.nit:235 */
+  REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+  }
+  REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+  /* ./../lib/standard//collection//array.nit:236 */
+  fra.me.REG[2] = ATTR_array___Array____items(fra.me.REG[1]);
+  /* ./../lib/standard//collection//array.nit:237 */
   while(1) {
-    REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[1])(fra.me.REG[1]);
-    if (UNTAG_Bool(REGB0)) {
-      fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
-      fra.me.REG[3] = CALL_opts___Option___names(fra.me.REG[2])(fra.me.REG[2]);
-      fra.me.REG[3] = CALL_abstract_collection___Collection___iterator(fra.me.REG[3])(fra.me.REG[3]);
-      /* ./../lib/opts.nit:262 */
+    /* ./../lib/standard//collection//array.nit:23 */
+    REGB1 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+    }
+    REGB1 = ATTR_array___AbstractArrayRead____length(fra.me.REG[1]);
+    /* ./../lib/standard//kernel.nit:212 */
+    REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+    /* ./../lib/standard//collection//array.nit:237 */
+    if (UNTAG_Bool(REGB1)) {
+      /* ./../lib/standard//collection//array.nit:238 */
+      REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
+        nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+      }
+      /* ./../lib/standard//collection//array.nit:654 */
+      fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
+      /* ./../lib/opts.nit:263 */
+      fra.me.REG[4] = CALL_opts___Option___names(fra.me.REG[3])(fra.me.REG[3]);
+      /* ./../lib/standard//collection//array.nit:234 */
+      REGB1 = TAG_Int(0);
+      /* ./../lib/standard//collection//array.nit:235 */
+      REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[4])!=NIT_NULL);
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 235);
+      }
+      REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[4]);
+      /* ./../lib/standard//collection//array.nit:236 */
+      fra.me.REG[5] = ATTR_array___Array____items(fra.me.REG[4]);
+      /* ./../lib/standard//collection//array.nit:237 */
       while(1) {
-        REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[3])(fra.me.REG[3]);
-        if (UNTAG_Bool(REGB0)) {
-          fra.me.REG[4] = CALL_abstract_collection___Iterator___item(fra.me.REG[3])(fra.me.REG[3]);
-          REGB0 = TAG_Bool(ATTR_opts___OptionContext____optmap(fra.me.REG[0])!=NIT_NULL);
-          /* ./../lib/opts.nit:263 */
-          if (UNTAG_Bool(REGB0)) {
+        /* ./../lib/standard//collection//array.nit:23 */
+        REGB2 = TAG_Bool(ATTR_array___AbstractArrayRead____length(fra.me.REG[4])!=NIT_NULL);
+        if (UNTAG_Bool(REGB2)) {
+        } else {
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_array, 23);
+        }
+        REGB2 = ATTR_array___AbstractArrayRead____length(fra.me.REG[4]);
+        /* ./../lib/standard//kernel.nit:212 */
+        REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
+        /* ./../lib/standard//collection//array.nit:237 */
+        if (UNTAG_Bool(REGB2)) {
+          /* ./../lib/standard//collection//array.nit:238 */
+          REGB2 = TAG_Bool(fra.me.REG[5]==NIT_NULL);
+          if (UNTAG_Bool(REGB2)) {
+            nit_abort("Reciever is null", NULL, LOCATE_array, 238);
+          }
+          /* ./../lib/standard//collection//array.nit:654 */
+          fra.me.REG[6] = ((Nit_NativeArray)fra.me.REG[5])->val[UNTAG_Int(REGB1)];
+          /* ./../lib/opts.nit:264 */
+          REGB2 = TAG_Bool(ATTR_opts___OptionContext____optmap(fra.me.REG[0])!=NIT_NULL);
+          if (UNTAG_Bool(REGB2)) {
           } else {
-            fprintf(stderr, "Uninitialized attribute %s", "_optmap");
-            fprintf(stderr, " (%s:%d)\n", LOCATE_opts, 263);
-            nit_exit(1);
+            nit_abort("Uninitialized attribute %s", "_optmap", LOCATE_opts, 264);
           }
-          fra.me.REG[5] = ATTR_opts___OptionContext____optmap(fra.me.REG[0]);
-          CALL_abstract_collection___Map_____braeq(fra.me.REG[5])(fra.me.REG[5], fra.me.REG[4], fra.me.REG[2]);
+          fra.me.REG[7] = ATTR_opts___OptionContext____optmap(fra.me.REG[0]);
+          CALL_abstract_collection___Map_____braeq(fra.me.REG[7])(fra.me.REG[7], fra.me.REG[6], fra.me.REG[3]);
+          /* ./../lib/standard//collection//array.nit:239 */
+          REGB2 = TAG_Int(1);
+          /* ./../lib/standard//kernel.nit:215 */
+          REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
+          /* ./../lib/standard//collection//array.nit:239 */
+          REGB1 = REGB2;
         } else {
-          /* ./../lib/opts.nit:262 */
+          /* ./../lib/standard//collection//array.nit:237 */
           goto label1;
         }
-        CALL_abstract_collection___Iterator___next(fra.me.REG[3])(fra.me.REG[3]);
       }
       label1: while(0);
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB1 = TAG_Int(1);
+      /* ./../lib/standard//kernel.nit:215 */
+      REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
+      /* ./../lib/standard//collection//array.nit:239 */
+      REGB0 = REGB1;
     } else {
-      /* ./../lib/opts.nit:261 */
+      /* ./../lib/standard//collection//array.nit:237 */
       goto label2;
     }
-    CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
   }
   label2: while(0);
   stack_frame_head = fra.me.prev;