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gcc/libstdc++-v3/python/libstdcxx/v6/printers.py
Phil Muldoon 852e2c40de printers.py (StdStringPrinter.__init__): Remove encoding argument. 
2010-01-15  Phil Muldoon  <pmuldoon@redhat.com>

	* python/libstdcxx/v6/printers.py (StdStringPrinter.__init__):
	Remove encoding argument.
	(StdStringPrinter.to_string): Do not compute or pass encoding.
	Use lazy_string over string function.


--this line, and those below, will be ignored--

M    libstdc++-v3/python/libstdcxx/v6/printers.py
M    libstdc++-v3/ChangeLog

From-SVN: r155951
2010-01-15 23:36:58 +00:00

764 lines
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# Pretty-printers for libstc++.
# Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import gdb
import itertools
import re
class StdPointerPrinter:
"Print a smart pointer of some kind"
def __init__ (self, typename, val):
self.typename = typename
self.val = val
def to_string (self):
if self.val['_M_refcount']['_M_pi'] == 0:
return '%s (empty) %s' % (self.typename, self.val['_M_ptr'])
return '%s (count %d) %s' % (self.typename,
self.val['_M_refcount']['_M_pi']['_M_use_count'],
self.val['_M_ptr'])
class UniquePointerPrinter:
"Print a unique_ptr"
def __init__ (self, val):
self.val = val
def to_string (self):
return self.val['_M_t']
class StdListPrinter:
"Print a std::list"
class _iterator:
def __init__(self, nodetype, head):
self.nodetype = nodetype
self.base = head['_M_next']
self.head = head.address
self.count = 0
def __iter__(self):
return self
def next(self):
if self.base == self.head:
raise StopIteration
elt = self.base.cast(self.nodetype).dereference()
self.base = elt['_M_next']
count = self.count
self.count = self.count + 1
return ('[%d]' % count, elt['_M_data'])
def __init__(self, typename, val):
self.typename = typename
self.val = val
def children(self):
itype = self.val.type.template_argument(0)
# If the inferior program is compiled with -D_GLIBCXX_DEBUG
# some of the internal implementation details change.
if self.typename == "std::list":
nodetype = gdb.lookup_type('std::_List_node<%s>' % itype).pointer()
elif self.typename == "std::__debug::list":
nodetype = gdb.lookup_type('std::__norm::_List_node<%s>' % itype).pointer()
else:
raise "Cannot cast list node for list printer."
return self._iterator(nodetype, self.val['_M_impl']['_M_node'])
def to_string(self):
if self.val['_M_impl']['_M_node'].address == self.val['_M_impl']['_M_node']['_M_next']:
return 'empty %s' % (self.typename)
return '%s' % (self.typename)
class StdListIteratorPrinter:
"Print std::list::iterator"
def __init__(self, typename, val):
self.val = val
self.typename = typename
def to_string(self):
itype = self.val.type.template_argument(0)
# If the inferior program is compiled with -D_GLIBCXX_DEBUG
# some of the internal implementation details change.
if self.typename == "std::_List_iterator" or self.typename == "std::_List_const_iterator":
nodetype = gdb.lookup_type('std::_List_node<%s>' % itype).pointer()
elif self.typename == "std::__norm::_List_iterator" or self.typename == "std::__norm::_List_const_iterator":
nodetype = gdb.lookup_type('std::__norm::_List_node<%s>' % itype).pointer()
else:
raise "Cannot cast list node for list iterator printer."
return self.val['_M_node'].cast(nodetype).dereference()['_M_data']
class StdSlistPrinter:
"Print a __gnu_cxx::slist"
class _iterator:
def __init__(self, nodetype, head):
self.nodetype = nodetype
self.base = head['_M_head']['_M_next']
self.count = 0
def __iter__(self):
return self
def next(self):
if self.base == 0:
raise StopIteration
elt = self.base.cast(self.nodetype).dereference()
self.base = elt['_M_next']
count = self.count
self.count = self.count + 1
return ('[%d]' % count, elt['_M_data'])
def __init__(self, val):
self.val = val
def children(self):
itype = self.val.type.template_argument(0)
nodetype = gdb.lookup_type('__gnu_cxx::_Slist_node<%s>' % itype).pointer()
return self._iterator(nodetype, self.val)
def to_string(self):
if self.val['_M_head']['_M_next'] == 0:
return 'empty __gnu_cxx::slist'
return '__gnu_cxx::slist'
class StdSlistIteratorPrinter:
"Print __gnu_cxx::slist::iterator"
def __init__(self, val):
self.val = val
def to_string(self):
itype = self.val.type.template_argument(0)
nodetype = gdb.lookup_type('__gnu_cxx::_Slist_node<%s>' % itype).pointer()
return self.val['_M_node'].cast(nodetype).dereference()['_M_data']
class StdVectorPrinter:
"Print a std::vector"
class _iterator:
def __init__ (self, start, finish):
self.item = start
self.finish = finish
self.count = 0
def __iter__(self):
return self
def next(self):
if self.item == self.finish:
raise StopIteration
count = self.count
self.count = self.count + 1
elt = self.item.dereference()
self.item = self.item + 1
return ('[%d]' % count, elt)
def __init__(self, typename, val):
self.typename = typename
self.val = val
def children(self):
return self._iterator(self.val['_M_impl']['_M_start'],
self.val['_M_impl']['_M_finish'])
def to_string(self):
start = self.val['_M_impl']['_M_start']
finish = self.val['_M_impl']['_M_finish']
end = self.val['_M_impl']['_M_end_of_storage']
return ('%s of length %d, capacity %d'
% (self.typename, int (finish - start), int (end - start)))
def display_hint(self):
return 'array'
class StdVectorIteratorPrinter:
"Print std::vector::iterator"
def __init__(self, val):
self.val = val
def to_string(self):
return self.val['_M_current'].dereference()
class StdTuplePrinter:
"Print a std::tuple"
class _iterator:
def __init__ (self, head):
self.head = head
# Set the base class as the initial head of the
# tuple.
nodes = self.head.type.fields ()
if len (nodes) != 1:
raise "Top of tuple tree does not consist of a single node."
# Set the actual head to the first pair.
self.head = self.head.cast (nodes[0].type)
self.count = 0
def __iter__ (self):
return self
def next (self):
nodes = self.head.type.fields ()
# Check for further recursions in the inheritance tree.
if len (nodes) == 0:
raise StopIteration
# Check that this iteration has an expected structure.
if len (nodes) != 2:
raise "Cannot parse more than 2 nodes in a tuple tree."
# - Left node is the next recursion parent.
# - Right node is the actual class contained in the tuple.
# Process right node.
impl = self.head.cast (nodes[1].type)
# Process left node and set it as head.
self.head = self.head.cast (nodes[0].type)
self.count = self.count + 1
# Finally, check the implementation. If it is
# wrapped in _M_head_impl return that, otherwise return
# the value "as is".
fields = impl.type.fields ()
if len (fields) < 1 or fields[0].name != "_M_head_impl":
return ('[%d]' % self.count, impl)
else:
return ('[%d]' % self.count, impl['_M_head_impl'])
def __init__ (self, typename, val):
self.typename = typename
self.val = val;
def children (self):
return self._iterator (self.val)
def to_string (self):
return '%s containing' % (self.typename)
class StdStackOrQueuePrinter:
"Print a std::stack or std::queue"
def __init__ (self, typename, val):
self.typename = typename
self.visualizer = gdb.default_visualizer(val['c'])
def children (self):
return self.visualizer.children()
def to_string (self):
return '%s wrapping: %s' % (self.typename,
self.visualizer.to_string())
def display_hint (self):
if hasattr (self.visualizer, 'display_hint'):
return self.visualizer.display_hint ()
return None
class RbtreeIterator:
def __init__(self, rbtree):
self.size = rbtree['_M_t']['_M_impl']['_M_node_count']
self.node = rbtree['_M_t']['_M_impl']['_M_header']['_M_left']
self.count = 0
def __iter__(self):
return self
def __len__(self):
return int (self.size)
def next(self):
if self.count == self.size:
raise StopIteration
result = self.node
self.count = self.count + 1
if self.count < self.size:
# Compute the next node.
node = self.node
if node.dereference()['_M_right']:
node = node.dereference()['_M_right']
while node.dereference()['_M_left']:
node = node.dereference()['_M_left']
else:
parent = node.dereference()['_M_parent']
while node == parent.dereference()['_M_right']:
node = parent
parent = parent.dereference()['_M_parent']
if node.dereference()['_M_right'] != parent:
node = parent
self.node = node
return result
# This is a pretty printer for std::_Rb_tree_iterator (which is
# std::map::iterator), and has nothing to do with the RbtreeIterator
# class above.
class StdRbtreeIteratorPrinter:
"Print std::map::iterator"
def __init__ (self, val):
self.val = val
def to_string (self):
valuetype = self.val.type.template_argument(0)
nodetype = gdb.lookup_type('std::_Rb_tree_node < %s >' % valuetype)
nodetype = nodetype.pointer()
return self.val.cast(nodetype).dereference()['_M_value_field']
class StdDebugIteratorPrinter:
"Print a debug enabled version of an iterator"
def __init__ (self, val):
self.val = val
# Just strip away the encapsulating __gnu_debug::_Safe_iterator
# and return the wrapped iterator value.
def to_string (self):
itype = self.val.type.template_argument(0)
return self.val['_M_current'].cast(itype)
class StdMapPrinter:
"Print a std::map or std::multimap"
# Turn an RbtreeIterator into a pretty-print iterator.
class _iter:
def __init__(self, rbiter, type):
self.rbiter = rbiter
self.count = 0
self.type = type
def __iter__(self):
return self
def next(self):
if self.count % 2 == 0:
n = self.rbiter.next()
n = n.cast(self.type).dereference()['_M_value_field']
self.pair = n
item = n['first']
else:
item = self.pair['second']
result = ('[%d]' % self.count, item)
self.count = self.count + 1
return result
def __init__ (self, typename, val):
self.typename = typename
self.val = val
def to_string (self):
return '%s with %d elements' % (self.typename,
len (RbtreeIterator (self.val)))
def children (self):
keytype = self.val.type.template_argument(0).const()
valuetype = self.val.type.template_argument(1)
nodetype = gdb.lookup_type('std::_Rb_tree_node< std::pair< %s, %s > >' % (keytype, valuetype))
nodetype = nodetype.pointer()
return self._iter (RbtreeIterator (self.val), nodetype)
def display_hint (self):
return 'map'
class StdSetPrinter:
"Print a std::set or std::multiset"
# Turn an RbtreeIterator into a pretty-print iterator.
class _iter:
def __init__(self, rbiter, type):
self.rbiter = rbiter
self.count = 0
self.type = type
def __iter__(self):
return self
def next(self):
item = self.rbiter.next()
item = item.cast(self.type).dereference()['_M_value_field']
# FIXME: this is weird ... what to do?
# Maybe a 'set' display hint?
result = ('[%d]' % self.count, item)
self.count = self.count + 1
return result
def __init__ (self, typename, val):
self.typename = typename
self.val = val
def to_string (self):
return '%s with %d elements' % (self.typename,
len (RbtreeIterator (self.val)))
def children (self):
keytype = self.val.type.template_argument(0)
nodetype = gdb.lookup_type('std::_Rb_tree_node< %s >' % keytype).pointer()
return self._iter (RbtreeIterator (self.val), nodetype)
class StdBitsetPrinter:
"Print a std::bitset"
def __init__(self, typename, val):
self.typename = typename
self.val = val
def to_string (self):
# If template_argument handled values, we could print the
# size. Or we could use a regexp on the type.
return '%s' % (self.typename)
def children (self):
words = self.val['_M_w']
wtype = words.type
# The _M_w member can be either an unsigned long, or an
# array. This depends on the template specialization used.
# If it is a single long, convert to a single element list.
if wtype.code == gdb.TYPE_CODE_ARRAY:
tsize = wtype.target ().sizeof
else:
words = [words]
tsize = wtype.sizeof
nwords = wtype.sizeof / tsize
result = []
byte = 0
while byte < nwords:
w = words[byte]
bit = 0
while w != 0:
if (w & 1) != 0:
# Another spot where we could use 'set'?
result.append(('[%d]' % (byte * tsize * 8 + bit), 1))
bit = bit + 1
w = w >> 1
byte = byte + 1
return result
class StdDequePrinter:
"Print a std::deque"
class _iter:
def __init__(self, node, start, end, last, buffer_size):
self.node = node
self.p = start
self.end = end
self.last = last
self.buffer_size = buffer_size
self.count = 0
def __iter__(self):
return self
def next(self):
if self.p == self.last:
raise StopIteration
result = ('[%d]' % self.count, self.p.dereference())
self.count = self.count + 1
# Advance the 'cur' pointer.
self.p = self.p + 1
if self.p == self.end:
# If we got to the end of this bucket, move to the
# next bucket.
self.node = self.node + 1
self.p = self.node[0]
self.end = self.p + self.buffer_size
return result
def __init__(self, typename, val):
self.typename = typename
self.val = val
self.elttype = val.type.template_argument(0)
size = self.elttype.sizeof
if size < 512:
self.buffer_size = int (512 / size)
else:
self.buffer_size = 1
def to_string(self):
start = self.val['_M_impl']['_M_start']
end = self.val['_M_impl']['_M_finish']
delta_n = end['_M_node'] - start['_M_node'] - 1
delta_s = start['_M_last'] - start['_M_cur']
delta_e = end['_M_cur'] - end['_M_first']
size = self.buffer_size * delta_n + delta_s + delta_e
return '%s with %d elements' % (self.typename, long (size))
def children(self):
start = self.val['_M_impl']['_M_start']
end = self.val['_M_impl']['_M_finish']
return self._iter(start['_M_node'], start['_M_cur'], start['_M_last'],
end['_M_cur'], self.buffer_size)
def display_hint (self):
return 'array'
class StdDequeIteratorPrinter:
"Print std::deque::iterator"
def __init__(self, val):
self.val = val
def to_string(self):
return self.val['_M_cur'].dereference()
class StdStringPrinter:
"Print a std::basic_string of some kind"
def __init__(self, val):
self.val = val
def to_string(self):
# Make sure &string works, too.
type = self.val.type
if type.code == gdb.TYPE_CODE_REF:
type = type.target ()
# Calculate the length of the string so that to_string returns
# the string according to length, not according to first null
# encountered.
ptr = self.val ['_M_dataplus']['_M_p']
realtype = type.unqualified ().strip_typedefs ()
reptype = gdb.lookup_type (str (realtype) + '::_Rep').pointer ()
header = ptr.cast(reptype) - 1
len = header.dereference ()['_M_length']
return self.val['_M_dataplus']['_M_p'].lazy_string (length = len)
def display_hint (self):
return 'string'
class Tr1HashtableIterator:
def __init__ (self, hash):
self.count = 0
self.n_buckets = hash['_M_element_count']
if self.n_buckets == 0:
self.node = False
else:
self.bucket = hash['_M_buckets']
self.node = self.bucket[0]
self.update ()
def __iter__ (self):
return self
def update (self):
# If we advanced off the end of the chain, move to the next
# bucket.
while self.node == 0:
self.bucket = self.bucket + 1
self.node = self.bucket[0]
# If we advanced off the end of the bucket array, then
# we're done.
if self.count == self.n_buckets:
self.node = False
else:
self.count = self.count + 1
def next (self):
if not self.node:
raise StopIteration
result = self.node.dereference()['_M_v']
self.node = self.node.dereference()['_M_next']
self.update ()
return result
class Tr1UnorderedSetPrinter:
"Print a tr1::unordered_set"
def __init__ (self, typename, val):
self.typename = typename
self.val = val
def to_string (self):
return '%s with %d elements' % (self.typename, self.val['_M_element_count'])
@staticmethod
def format_count (i):
return '[%d]' % i
def children (self):
counter = itertools.imap (self.format_count, itertools.count())
return itertools.izip (counter, Tr1HashtableIterator (self.val))
class Tr1UnorderedMapPrinter:
"Print a tr1::unordered_map"
def __init__ (self, typename, val):
self.typename = typename
self.val = val
def to_string (self):
return '%s with %d elements' % (self.typename, self.val['_M_element_count'])
@staticmethod
def flatten (list):
for elt in list:
for i in elt:
yield i
@staticmethod
def format_one (elt):
return (elt['first'], elt['second'])
@staticmethod
def format_count (i):
return '[%d]' % i
def children (self):
counter = itertools.imap (self.format_count, itertools.count())
# Map over the hash table and flatten the result.
data = self.flatten (itertools.imap (self.format_one, Tr1HashtableIterator (self.val)))
# Zip the two iterators together.
return itertools.izip (counter, data)
def display_hint (self):
return 'map'
def register_libstdcxx_printers (obj):
"Register libstdc++ pretty-printers with objfile Obj."
if obj == None:
obj = gdb
obj.pretty_printers.append (lookup_function)
def lookup_function (val):
"Look-up and return a pretty-printer that can print val."
# Get the type.
type = val.type
# If it points to a reference, get the reference.
if type.code == gdb.TYPE_CODE_REF:
type = type.target ()
# Get the unqualified type, stripped of typedefs.
type = type.unqualified ().strip_typedefs ()
# Get the type name.
typename = type.tag
if typename == None:
return None
# Iterate over local dictionary of types to determine
# if a printer is registered for that type. Return an
# instantiation of the printer if found.
for function in pretty_printers_dict:
if function.search (typename):
return pretty_printers_dict[function] (val)
# Cannot find a pretty printer. Return None.
return None
def build_libstdcxx_dictionary ():
# libstdc++ objects requiring pretty-printing.
# In order from:
# http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a01847.html
pretty_printers_dict[re.compile('^std::basic_string<.*>$')] = lambda val: StdStringPrinter(val)
pretty_printers_dict[re.compile('^std::bitset<.*>$')] = lambda val: StdBitsetPrinter("std::bitset", val)
pretty_printers_dict[re.compile('^std::deque<.*>$')] = lambda val: StdDequePrinter("std::deque", val)
pretty_printers_dict[re.compile('^std::list<.*>$')] = lambda val: StdListPrinter("std::list", val)
pretty_printers_dict[re.compile('^std::map<.*>$')] = lambda val: StdMapPrinter("std::map", val)
pretty_printers_dict[re.compile('^std::multimap<.*>$')] = lambda val: StdMapPrinter("std::multimap", val)
pretty_printers_dict[re.compile('^std::multiset<.*>$')] = lambda val: StdSetPrinter("std::multiset", val)
pretty_printers_dict[re.compile('^std::priority_queue<.*>$')] = lambda val: StdStackOrQueuePrinter("std::priority_queue", val)
pretty_printers_dict[re.compile('^std::queue<.*>$')] = lambda val: StdStackOrQueuePrinter("std::queue", val)
pretty_printers_dict[re.compile('^std::tuple<.*>$')] = lambda val: StdTuplePrinter("std::tuple", val)
pretty_printers_dict[re.compile('^std::set<.*>$')] = lambda val: StdSetPrinter("std::set", val)
pretty_printers_dict[re.compile('^std::stack<.*>$')] = lambda val: StdStackOrQueuePrinter("std::stack", val)
pretty_printers_dict[re.compile('^std::unique_ptr<.*>$')] = UniquePointerPrinter
pretty_printers_dict[re.compile('^std::vector<.*>$')] = lambda val: StdVectorPrinter("std::vector", val)
# vector<bool>
# Printer registrations for classes compiled with -D_GLIBCXX_DEBUG.
pretty_printers_dict[re.compile('^std::__debug::bitset<.*>$')] = lambda val: StdBitsetPrinter("std::__debug::bitset", val)
pretty_printers_dict[re.compile('^std::__debug::deque<.*>$')] = lambda val: StdDequePrinter("std::__debug::deque", val)
pretty_printers_dict[re.compile('^std::__debug::list<.*>$')] = lambda val: StdListPrinter("std::__debug::list", val)
pretty_printers_dict[re.compile('^std::__debug::map<.*>$')] = lambda val: StdMapPrinter("std::__debug::map", val)
pretty_printers_dict[re.compile('^std::__debug::multimap<.*>$')] = lambda val: StdMapPrinter("std::__debug::multimap", val)
pretty_printers_dict[re.compile('^std::__debug::multiset<.*>$')] = lambda val: StdSetPrinter("std::__debug::multiset", val)
pretty_printers_dict[re.compile('^std::__debug::priority_queue<.*>$')] = lambda val: StdStackOrQueuePrinter("std::__debug::priority_queue", val)
pretty_printers_dict[re.compile('^std::__debug::queue<.*>$')] = lambda val: StdStackOrQueuePrinter("std::__debug::queue", val)
pretty_printers_dict[re.compile('^std::__debug::set<.*>$')] = lambda val: StdSetPrinter("std::__debug::set", val)
pretty_printers_dict[re.compile('^std::__debug::stack<.*>$')] = lambda val: StdStackOrQueuePrinter("std::__debug::stack", val)
pretty_printers_dict[re.compile('^std::__debug::unique_ptr<.*>$')] = UniquePointerPrinter
pretty_printers_dict[re.compile('^std::__debug::vector<.*>$')] = lambda val: StdVectorPrinter("std::__debug::vector", val)
# These are the TR1 and C++0x printers.
# For array - the default GDB pretty-printer seems reasonable.
pretty_printers_dict[re.compile('^std::shared_ptr<.*>$')] = lambda val: StdPointerPrinter ('std::shared_ptr', val)
pretty_printers_dict[re.compile('^std::weak_ptr<.*>$')] = lambda val: StdPointerPrinter ('std::weak_ptr', val)
pretty_printers_dict[re.compile('^std::unordered_map<.*>$')] = lambda val: Tr1UnorderedMapPrinter ('std::unordered_map', val)
pretty_printers_dict[re.compile('^std::unordered_set<.*>$')] = lambda val: Tr1UnorderedSetPrinter ('std::unordered_set', val)
pretty_printers_dict[re.compile('^std::unordered_multimap<.*>$')] = lambda val: Tr1UnorderedMapPrinter ('std::unordered_multimap', val)
pretty_printers_dict[re.compile('^std::unordered_multiset<.*>$')] = lambda val: Tr1UnorderedSetPrinter ('std::unordered_multiset', val)
pretty_printers_dict[re.compile('^std::tr1::shared_ptr<.*>$')] = lambda val: StdPointerPrinter ('std::tr1::shared_ptr', val)
pretty_printers_dict[re.compile('^std::tr1::weak_ptr<.*>$')] = lambda val: StdPointerPrinter ('std::tr1::weak_ptr', val)
pretty_printers_dict[re.compile('^std::tr1::unordered_map<.*>$')] = lambda val: Tr1UnorderedMapPrinter ('std::tr1::unordered_map', val)
pretty_printers_dict[re.compile('^std::tr1::unordered_set<.*>$')] = lambda val: Tr1UnorderedSetPrinter ('std::tr1::unordered_set', val)
pretty_printers_dict[re.compile('^std::tr1::unordered_multimap<.*>$')] = lambda val: Tr1UnorderedMapPrinter ('std::tr1::unordered_multimap', val)
pretty_printers_dict[re.compile('^std::tr1::unordered_multiset<.*>$')] = lambda val: Tr1UnorderedSetPrinter ('std::tr1::unordered_multiset', val)
# These are the C++0x printer registrations for -D_GLIBCXX_DEBUG cases.
# The tr1 namespace printers do not seem to have any debug
# equivalents, so do no register them.
pretty_printers_dict[re.compile('^std::__debug::unordered_map<.*>$')] = lambda val: Tr1UnorderedMapPrinter ('std::__debug::unordered_map', val)
pretty_printers_dict[re.compile('^std::__debug::unordered_set<.*>$')] = lambda val: Tr1UnorderedSetPrinter ('std::__debug::unordered_set', val)
pretty_printers_dict[re.compile('^std::__debug::unordered_multimap<.*>$')] = lambda val: Tr1UnorderedMapPrinter ('std::__debug::unordered_multimap', val)
pretty_printers_dict[re.compile('^std::__debug::unordered_multiset<.*>$')] = lambda val: Tr1UnorderedSetPrinter ('std::__debug:unordered_multiset', val)
# Extensions.
pretty_printers_dict[re.compile('^__gnu_cxx::slist<.*>$')] = StdSlistPrinter
if True:
# These shouldn't be necessary, if GDB "print *i" worked.
# But it often doesn't, so here they are.
pretty_printers_dict[re.compile('^std::_List_iterator<.*>$')] = lambda val: StdListIteratorPrinter("std::_List_iterator",val)
pretty_printers_dict[re.compile('^std::_List_const_iterator<.*>$')] = lambda val: StdListIteratorPrinter("std::_List_const_iterator",val)
pretty_printers_dict[re.compile('^std::_Rb_tree_iterator<.*>$')] = lambda val: StdRbtreeIteratorPrinter(val)
pretty_printers_dict[re.compile('^std::_Rb_tree_const_iterator<.*>$')] = lambda val: StdRbtreeIteratorPrinter(val)
pretty_printers_dict[re.compile('^std::_Deque_iterator<.*>$')] = lambda val: StdDequeIteratorPrinter(val)
pretty_printers_dict[re.compile('^std::_Deque_const_iterator<.*>$')] = lambda val: StdDequeIteratorPrinter(val)
pretty_printers_dict[re.compile('^__gnu_cxx::__normal_iterator<.*>$')] = lambda val: StdVectorIteratorPrinter(val)
pretty_printers_dict[re.compile('^__gnu_cxx::_Slist_iterator<.*>$')] = lambda val: StdSlistIteratorPrinter(val)
# Debug (compiled with -D_GLIBCXX_DEBUG) printer registrations.
# The Rb_tree debug iterator when unwrapped from the encapsulating __gnu_debug::_Safe_iterator
# does not have the __norm namespace. Just use the existing printer registration for that.
pretty_printers_dict[re.compile('^__gnu_debug::_Safe_iterator<.*>$')] = lambda val: StdDebugIteratorPrinter(val)
pretty_printers_dict[re.compile('^std::__norm::_List_iterator<.*>$')] = lambda val: StdListIteratorPrinter ("std::__norm::_List_iterator",val)
pretty_printers_dict[re.compile('^std::__norm::_List_const_iterator<.*>$')] = lambda val: StdListIteratorPrinter ("std::__norm::_List_const_iterator",val)
pretty_printers_dict[re.compile('^std::__norm::_Deque_const_iterator<.*>$')] = lambda val: StdDequeIteratorPrinter(val)
pretty_printers_dict[re.compile('^std::__norm::_Deque_iterator<.*>$')] = lambda val: StdDequeIteratorPrinter(val)
pretty_printers_dict = {}
build_libstdcxx_dictionary ()
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