diff options
author | redi <redi@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-07-15 12:00:18 +0000 |
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committer | redi <redi@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-07-15 12:00:18 +0000 |
commit | f29d6b5d809df660a989dd19b8afe68d08934d9f (patch) | |
tree | 5464d3c9a5c218281fb459067905bd8df4505194 /libstdc++-v3/python | |
parent | a29af167954a32ceb89db0786eb3567ee2fcda29 (diff) | |
download | gcc-f29d6b5d809df660a989dd19b8afe68d08934d9f.tar.gz |
* python/libstdcxx/v6/printers.py (SingleObjContainerPrinter): New
base class for experimental::any and experimental::optional printers.
(StdExpAnyPrinter, StdExpOptionalPrinter, StdExpStringViewPrinter):
New printers for Fundamentals TS types.
* testsuite/libstdc++-prettyprinters/libfundts.cc: New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@212556 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libstdc++-v3/python')
-rw-r--r-- | libstdc++-v3/python/libstdcxx/v6/printers.py | 131 |
1 files changed, 129 insertions, 2 deletions
diff --git a/libstdc++-v3/python/libstdcxx/v6/printers.py b/libstdc++-v3/python/libstdcxx/v6/printers.py index ea34f222cdf..af41f1ffaeb 100644 --- a/libstdc++-v3/python/libstdcxx/v6/printers.py +++ b/libstdc++-v3/python/libstdcxx/v6/printers.py @@ -836,6 +836,126 @@ class StdForwardListPrinter: return 'empty %s' % (self.typename) return '%s' % (self.typename) +class SingleObjContainerPrinter(object): + "Base class for printers of containers of single objects" + + def __init__ (self, val, viz): + self.contained_value = val + self.visualizer = viz + + def _recognize(self, type): + """Return TYPE as a string after applying type printers""" + return gdb.types.apply_type_recognizers(gdb.types.get_type_recognizers(), + type) or str(type) + + class _contained: + def __init__ (self, val): + self.val = val + + def __iter__ (self): + return self + + def next (self): + if self.val is None: + raise StopIteration + retval = self.val + self.val = None + return ('[contained value]', retval) + + def children (self): + if self.contained_value is None: + return self._contained (None) + if hasattr (self.visualizer, 'children'): + return self.visualizer.children () + return self._contained (self.contained_value) + + def display_hint (self): + # if contained value is a map we want to display in the same way + if hasattr (self.visualizer, 'children') and hasattr (self.visualizer, 'display_hint'): + return self.visualizer.display_hint () + return None + + +class StdExpAnyPrinter(SingleObjContainerPrinter): + "Print a std::experimental::any" + + def __init__ (self, typename, val): + self.typename = 'std::experimental::any' + self.val = val + self.contained_type = None + contained_value = None + visualizer = None + mgr = self.val['_M_manager'] + if mgr != 0: + func = gdb.block_for_pc(int(mgr.cast(gdb.lookup_type('intptr_t')))) + if not func: + raise ValueError("Invalid function pointer in std::experimental::any") + rx = r"""({0}::_Manager_\w+<.*>)::_S_manage\({0}::_Op, {0} const\*, {0}::_Arg\*\)""".format(typename) + m = re.match(rx, func.function.name) + if not m: + raise ValueError("Unknown manager function in std::experimental::any") + + # FIXME need to expand 'std::string' so that gdb.lookup_type works + mgrname = re.sub("std::string(?!\w)", gdb.lookup_type('std::string').strip_typedefs().name, m.group(1)) + mgrtype = gdb.lookup_type(mgrname) + self.contained_type = mgrtype.template_argument(0) + valptr = None + if '::_Manager_internal' in mgrname: + valptr = self.val['_M_storage']['_M_buffer'].address + elif '::_Manager_external' in mgrname: + valptr = self.val['_M_storage']['_M_ptr'] + elif '::_Manager_alloc' in mgrname: + datatype = gdb.lookup_type(mgrname + '::_Data') + valptr = self.val['_M_storage']['_M_ptr'].cast(datatype.pointer()) + valptr = valptr.dereference()['_M_data'].address + else: + raise ValueError("Unknown manager function in std::experimental::any") + contained_value = valptr.cast(self.contained_type.pointer()).dereference() + visualizer = gdb.default_visualizer(contained_value) + super(StdExpAnyPrinter, self).__init__ (contained_value, visualizer) + + def to_string (self): + if self.contained_type is None: + return '%s [no contained value]' % self.typename + desc = "%s containing " % self.typename + if hasattr (self.visualizer, 'children'): + return desc + self.visualizer.to_string () + valtype = self._recognize (self.contained_type) + return desc + valtype + +class StdExpOptionalPrinter(SingleObjContainerPrinter): + "Print a std::experimental::optional" + + def __init__ (self, typename, val): + valtype = self._recognize (val.type.template_argument(0)) + self.typename = "std::experimental::optional<%s>" % valtype + self.val = val + contained_value = val['_M_payload'] if self.val['_M_engaged'] else None + visualizer = gdb.default_visualizer (val['_M_payload']) + super (StdExpOptionalPrinter, self).__init__ (contained_value, visualizer) + + def to_string (self): + if self.contained_value is None: + return self.typename + " [no contained value]" + if hasattr (self.visualizer, 'children'): + return self.typename + " containing " + self.visualizer.to_string () + return self.typename + +class StdExpStringViewPrinter: + "Print a std::experimental::basic_string_view" + + def __init__ (self, typename, val): + self.val = val + + def to_string (self): + ptr = self.val['_M_str'] + len = self.val['_M_len'] + if hasattr (ptr, "lazy_string"): + return ptr.lazy_string (length = len) + return ptr.string (length = len) + + def display_hint (self): + return 'string' # A "regular expression" printer which conforms to the # "SubPrettyPrinter" protocol from gdb.printing. @@ -865,12 +985,12 @@ class Printer(object): self.subprinters = [] self.lookup = {} self.enabled = True - self.compiled_rx = re.compile('^([a-zA-Z0-9_:]+)<.*>$') + self.compiled_rx = re.compile('^([a-zA-Z0-9_:]+)(<.*>)?$') def add(self, name, function): # A small sanity check. # FIXME - if not self.compiled_rx.match(name + '<>'): + if not self.compiled_rx.match(name): raise ValueError('libstdc++ programming error: "%s" does not match' % name) printer = RxPrinter(name, function) self.subprinters.append(printer) @@ -1214,6 +1334,13 @@ def build_libstdcxx_dictionary (): libstdcxx_printer.add('std::__debug::forward_list', StdForwardListPrinter) + # Library Fundamentals TS components + libstdcxx_printer.add_version('std::experimental::fundamentals_v1::', + 'any', StdExpAnyPrinter) + libstdcxx_printer.add_version('std::experimental::fundamentals_v1::', + 'optional', StdExpOptionalPrinter) + libstdcxx_printer.add_version('std::experimental::fundamentals_v1::', + 'basic_string_view', StdExpStringViewPrinter) # Extensions. libstdcxx_printer.add_version('__gnu_cxx::', 'slist', StdSlistPrinter) |