- bugfix for deque with _size not being initialized

- wrote PrettyPrinter for deque

gdb/fennec/containers.py

@@ -138,6 +138,45 @@ class ListPrinter:
         return 'array'
 
 
+# DEQUE ================================================================================================================
+
+class DequePrinter:
+    """Print a fennec::deque"""
+
+    class Iterator:
+        def __init__(self, start):
+            self.node = start
+            self.index = 0
+
+        def __iter__(self):
+            return self
+
+        def __next__(self):
+            if self.node is None:
+                raise StopIteration
+
+            i = self.index
+            value = self.node.dereference()['value']
+
+            self.node = self.node.dereference()['next']
+            self.index = self.index + 1
+
+            return '[{}]'.format(i), value
+
+    def __init__(self, val):
+        self.first = val['_first']
+        self.last  = val['_last']
+        self.size  = val['_size']
+
+    def to_string(self):
+        if self.first is None:
+            return "{ empty }"
+        return "{ length " + str(self.size) + " }"
+
+    def children(self):
+        return self.Iterator(self.first)
+
+
 # SET ==================================================================================================================
 
 class SetPrinter:
@@ -426,6 +465,7 @@ def register_printers():
     print("registering containers")
     pp = gdb.printing.RegexpCollectionPrettyPrinter("fennec::containers")
     pp.add_printer('fennec::array',       '^fennec::array<.*>$',       ArrayPrinter)
+    pp.add_printer('fennec::deque',       '^fennec::deque<.*>$',       DequePrinter)
     pp.add_printer('fennec::dynarray',    '^fennec::dynarray<.*>$',    DynArrayPrinter)
     pp.add_printer('fennec::graph',       '^fennec::graph<.*>$',       GraphPrinter)
     pp.add_printer('fennec::list',        '^fennec::list<.*>$',        ListPrinter)