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# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
# GDB pretty printers for Boost.Optional.
#
# Copyright (C) 2012 Red Hat, Inc., David Tardon <dtardon@redhat.com>
#
# This file is part of boost-gdb-printers.
#
# 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 boost.util.printing as printing
class OptionalPrinter:
def __init__(self, typename, value):
self.typename = typename
self.value = value
def to_string(self):
if self.value['m_initialized']:
data = self.value['m_storage']['dummy_']['data']
ptr_type = self.value.type.template_argument(0).pointer()
return "%s %s" % (self.typename, data.cast(ptr_type).dereference())
else:
return "empty " + self.typename
printer = None
def build_pretty_printers():
global printer
if printer != None:
return
printer = printing.Printer("boost.optional")
printer.add('boost::optional', OptionalPrinter)
def register_pretty_printers(obj):
printing.register_pretty_printer(printer, obj)
build_pretty_printers()
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