From d66f5698a208956d20872d4118f846986cbd6c1d Mon Sep 17 00:00:00 2001
From: jnthn <jnthn@jnthn.net>
Date: Mon, 17 Aug 2009 20:44:36 +0200
Subject: [PATCH] Fully implement hides trait modifier's semantics.

---
 src/pmc/p6opaque.pmc | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/src/pmc/p6opaque.pmc b/src/pmc/p6opaque.pmc
index c9f9aec8f62..8b002f819b2 100644
--- a/src/pmc/p6opaque.pmc
+++ b/src/pmc/p6opaque.pmc
@@ -139,13 +139,39 @@ PMC *look_for_method(PARROT_INTERP, PMC *search_list, INTVAL *start_pos, STRING
         /* Support is hidden and the hides trait mod iff we're in deferal mode (that
          * is, we're continuing a lookup rather than starting from the bottom). */
         if (*start_pos > 0) {
+            PMC *my_metaclass = VTABLE_getprop(interp, cur_class, CONST_STRING(interp, "metaclass"));
+            int j, k, found;
+            
             /* Does this class have the is hidden property? */
-            PMC *metaclass = VTABLE_getprop(interp, cur_class, CONST_STRING(interp, "metaclass"));
-            if (!PMC_IS_NULL(metaclass)) {
-                PMC *hidden = VTABLE_get_attr_str(interp, metaclass, CONST_STRING(interp, "$!hidden"));
+            if (!PMC_IS_NULL(my_metaclass)) {
+                PMC *hidden = VTABLE_get_attr_str(interp, my_metaclass, CONST_STRING(interp, "$!hidden"));
                 if (!PMC_IS_NULL(hidden) && VTABLE_get_bool(interp, hidden))
                     continue;
             }
+
+            /* Does anything before it hide it? */
+            found = 0;
+            for (j = 0; j < i; j++) {
+                PMC *check_class     = VTABLE_get_pmc_keyed_int(interp, search_list, j);
+                PMC *check_metaclass = VTABLE_getprop(interp, check_class, CONST_STRING(interp, "metaclass"));
+                if (!PMC_IS_NULL(check_metaclass)) {
+                    PMC *hides = VTABLE_get_attr_str(interp, check_metaclass, CONST_STRING(interp, "$!hides"));
+                    if (!PMC_IS_NULL(hides)) {
+                        INTVAL hides_cnt = VTABLE_elements(interp, hides);
+                        for (k = 0; k < hides_cnt; k++) {
+                            PMC *cur_type_obj  = VTABLE_get_pmc_keyed_int(interp, hides, k);
+                            PMC *cur_metaclass = VTABLE_getprop(interp, VTABLE_get_class(interp,
+                                    cur_type_obj), CONST_STRING(interp, "metaclass"));
+                            if (cur_metaclass == my_metaclass) {
+                                found = 1;
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
+            if (found)
+                continue;
         }
 
         /* Make sure it's got the memory layout of a standard Parrot class. */