Python Boost无序地图打印程序正在多次打印值以及不需要的值

我正在尝试为boost:：unordered_map添加一台漂亮的打印机，方法是在现有的boost漂亮打印机列表中添加一台新打印机，如下所示：

但是，当我尝试打印地图时，很多值会被打印多次，并且会出现一些不需要的字符。我不确定还应该对现有代码进行哪些修改，使其只打印一次值，而不打印任何不需要的字符。下面是我在myMap.cpp中更新myMap的循环：

 for (int i=0; i<=10; i++)
 {
 string s = to_string(i);
 myMap[s] = i;
 }

我得到的结果如下：

$1 = boost::unordered::detail = {"1" = 1, "0" = 0, "2" = 2, "1" = 1, "0" = 0, "3" = 3, 
"2" = 2, "1" = 1, "0" = 0, "4" = 4, "3" = 3, "2" = 2, "1" = 1, "0" = 0, "5" = 5, "4" = 4, 
"3" = 3, "2" = 2, "1" = 1, "0" = 0, "6" = 6, "5" = 5, "4" = 4, "3" = 3, "2" = 2, "1" = 1, 
 "0" = 0, "7" = 7, "10" = 10, "6" = 6, "5" = 5, "4" = 4, "3" = 3, "2" = 2, "1" = 1, 
"0" = 0, "8" = 8, "7" = 7, "10" = 10, "6" = 6, "5" = 5, "4" = 4, "3" = 3, "2" = 2, 
"1" = 1, "0" = 0, "9" = 9, "8" = 8, "7" = 7, "10" = 10, "6" = 6, "5" = 5, "4" = 4, 
"3" = 3, "2" = 2, "1" = 1, "0" = 0, 
" \204`", '\000' <repeats 13 times>, "\321\n\002", '\000' <repeats 181 times>... = 0, 
"9" = 9, "8" = 8, "7" = 7, "10" = 10, "6" = 6, "5" = 5, "4" = 4, "3" = 3, "2" = 2, 
"1" = 1, "0" = 0}

$1=boost:：unordered:：detail={“1”=1，“0”=0，“2”=2，“1”=1，“0”=0，“3”=3，
"2" = 2, "1" = 1, "0" = 0, "4" = 4, "3" = 3, "2" = 2, "1" = 1, "0" = 0, "5" = 5, "4" = 4, 
"3" = 3, "2" = 2, "1" = 1, "0" = 0, "6" = 6, "5" = 5, "4" = 4, "3" = 3, "2" = 2, "1" = 1, 
"0" = 0, "7" = 7, "10" = 10, "6" = 6, "5" = 5, "4" = 4, "3" = 3, "2" = 2, "1" = 1, 
"0" = 0, "8" = 8, "7" = 7, "10" = 10, "6" = 6, "5" = 5, "4" = 4, "3" = 3, "2" = 2, 
"1" = 1, "0" = 0, "9" = 9, "8" = 8, "7" = 7, "10" = 10, "6" = 6, "5" = 5, "4" = 4, 
"3" = 3, "2" = 2, "1" = 1, "0" = 0, 
“\204`”、“\000”、“\321\n\002”、“\000”…=0，
"9" = 9, "8" = 8, "7" = 7, "10" = 10, "6" = 6, "5" = 5, "4" = 4, "3" = 3, "2" = 2, 
"1" = 1, "0" = 0}

我的pretty printer python代码如下所示：

@_register_printer
class BoostUnorderedMap:
"Pretty Printer for boost::unordered_map"
printer_name = 'boost::unordered_map'
version = '1.40'
type_name_re = '^boost::unordered::unordered_map<.*>$'

class _iterator:
def __init__(self,fields):
   type_1 = fields.val.type.template_argument(0)
   type_2 = fields.val.type.template_argument(1)

   self.buckets = fields.val['table_']['buckets_']
   self.bucket_count = fields.val['table_']['bucket_count_']
   self.bucket_size = fields.val['table_']['size_']
   self.current_bucket = 0
   self.value = 0
   self.iteration = 0
   self.temp_node = 0
   self.bucket_to_start = 0
   pair = "std::pair<%s const, %s>" % (type_1, type_2)
   self.pair_pointer = gdb.lookup_type(pair).pointer()
   self.base_pointer = gdb.lookup_type("boost::unordered::detail::value_base< %s >" % pair).pointer()
   self.node_pointer = gdb.lookup_type("boost::unordered::detail::ptr_node<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> >").pointer()
   self.node = self.buckets[self.current_bucket]['next_']



def __iter__(self):
    return self

def next(self): 
    while not self.node:
            self.current_bucket = self.current_bucket + 1
            if self.current_bucket >= self.bucket_count:
                raise StopIteration
            self.node = self.buckets[self.current_bucket]['next_']

    iterator = self.node.cast(self.node_pointer).cast(self.base_pointer).cast(self.pair_pointer).dereference()   
        self.node = self.node['next_']

        return ('%s' % iterator['first'], iterator['second'])

def __init__(self, val):
self.val = val

def children(self):
return self._iterator(self)

def to_string(self):
return "boost::unordered::detail"

    return ('%s' % iterator['first'], iterator['second'])

@\u寄存器\u打印机
类boostUnderedMap：
“用于boost:：无序映射的漂亮打印机”
打印机名称='boost:：无序\u映射'
版本='1.40'
键入“^boost:：unordered:：unordered\u map$”
类_迭代器：
定义初始化（自我，字段）：
type_1=fields.val.type.template_参数（0）
type_2=fields.val.type.template_参数（1）
self.bucket=fields.val['table\']['bucket\']
self.bucket\u count=fields.val['table\u']['bucket\u count\u']
self.bucket\u size=fields.val['table\u']['size\u']
自当前_bucket=0
self.value=0
self.iteration=0
self.temp_节点=0
self.bucket\u to\u start=0
pair=“std:：pair”%（类型1，类型2）
self.pair\u pointer=gdb.lookup\u类型（pair.pointer）（）
self.base\u pointer=gdb.lookup\u type（“boost:：unordered:：detail:：value\u base<%s>“%pair”）。指针（）
self.node_pointer=gdb.lookup_type（“boost:：unordered:：detail:：ptr_node”）.pointer（）
self.node=self.bucket[self.current\u bucket]['next\u']
定义（自我）：
回归自我
def next（自我）：
而不是self.node：
self.current\u bucket=self.current\u bucket+1
如果self.current\u bucket>=self.bucket\u count：
提出停止迭代
self.node=self.bucket[self.current\u bucket]['next\u']
迭代器=self.node.cast（self.node\u指针）.cast（self.base\u指针）.cast（self.pair\u指针）.dereference（）
self.node=self.node['next_u']
返回（“%s”%iterator['first']，iterator['second']））
定义初始值（self，val）：
self.val=val
def儿童（自我）：
返回self.\u迭代器（self）
def到_字符串（自）：
返回“boost:：unordered:：detail”

---

如果您有任何帮助，我们将不胜感激。

如果不进一步了解Boost的内部结构，就很难确切地知道出了什么问题。如果是我，我可能会破解“下一步”方法，添加一些调试打印，看看哪里出了问题

总之，在Python代码中有一件事很突出。现在返回的子元素如下所示：

@_register_printer
class BoostUnorderedMap:
"Pretty Printer for boost::unordered_map"
printer_name = 'boost::unordered_map'
version = '1.40'
type_name_re = '^boost::unordered::unordered_map<.*>$'

class _iterator:
def __init__(self,fields):
   type_1 = fields.val.type.template_argument(0)
   type_2 = fields.val.type.template_argument(1)

   self.buckets = fields.val['table_']['buckets_']
   self.bucket_count = fields.val['table_']['bucket_count_']
   self.bucket_size = fields.val['table_']['size_']
   self.current_bucket = 0
   self.value = 0
   self.iteration = 0
   self.temp_node = 0
   self.bucket_to_start = 0
   pair = "std::pair<%s const, %s>" % (type_1, type_2)
   self.pair_pointer = gdb.lookup_type(pair).pointer()
   self.base_pointer = gdb.lookup_type("boost::unordered::detail::value_base< %s >" % pair).pointer()
   self.node_pointer = gdb.lookup_type("boost::unordered::detail::ptr_node<std::pair<std::basic_string<char, std::char_traits<char>, std::allocator<char> > const, int> >").pointer()
   self.node = self.buckets[self.current_bucket]['next_']



def __iter__(self):
    return self

def next(self): 
    while not self.node:
            self.current_bucket = self.current_bucket + 1
            if self.current_bucket >= self.bucket_count:
                raise StopIteration
            self.node = self.buckets[self.current_bucket]['next_']

    iterator = self.node.cast(self.node_pointer).cast(self.base_pointer).cast(self.pair_pointer).dereference()   
        self.node = self.node['next_']

        return ('%s' % iterator['first'], iterator['second'])

def __init__(self, val):
self.val = val

def children(self):
return self._iterator(self)

def to_string(self):
return "boost::unordered::detail"

    return ('%s' % iterator['first'], iterator['second'])

但是，使用此API的通常方法是将映射的键和值作为单独的子项返回，然后使用返回“map”的display\u hint方法。看

在下一种方法中，您可以很容易地使用“yield”实现这一点