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| author | Philipp Fent <fent@in.tum.de> | 2022-04-14 17:06:02 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2022-04-19 14:18:33 +0100 |
| commit | fdb3f82fb324c3ddd7464d11c8ea60a98f486a0e (patch) | |
| tree | ca95582ee36253a4dbd38dc0fa0d3a255fdb9368 /libstdc++-v3/python | |
| parent | 214d2860f4e1573f04ef57bfea59da0cc66883ce (diff) | |
| download | gcc-fdb3f82fb324c3ddd7464d11c8ea60a98f486a0e.zip gcc-fdb3f82fb324c3ddd7464d11c8ea60a98f486a0e.tar.gz gcc-fdb3f82fb324c3ddd7464d11c8ea60a98f486a0e.tar.bz2 | |
libstdc++: Add pretty printer for std::span
This improves the debug output for C++20 spans.
Before:
{static extent = 18446744073709551615, _M_ptr = 0x7fffffffb9a8, _M_extent = {_M_extent_value = 2}}
Now with StdSpanPrinter:
std::span of length 2 = {1, 2}
Signed-off-by: Philipp Fent <fent@in.tum.de>
libstdc++-v3/ChangeLog:
* python/libstdcxx/v6/printers.py (StdSpanPrinter): Define.
* testsuite/libstdc++-prettyprinters/cxx20.cc: Test it.
Diffstat (limited to 'libstdc++-v3/python')
| -rw-r--r-- | libstdc++-v3/python/libstdcxx/v6/printers.py | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libstdc++-v3/python/libstdcxx/v6/printers.py b/libstdc++-v3/python/libstdcxx/v6/printers.py index f7a7f99..6d8b765 100644 --- a/libstdc++-v3/python/libstdcxx/v6/printers.py +++ b/libstdc++-v3/python/libstdcxx/v6/printers.py @@ -1654,6 +1654,43 @@ class StdRegexStatePrinter: s = "{}, {}={}".format(s, v, self.val['_M_' + v]) return "{%s}" % (s) +class StdSpanPrinter: + "Print a std::span" + + class _iterator(Iterator): + def __init__(self, begin, size): + self.count = 0 + self.begin = begin + self.size = size + + def __iter__ (self): + return self + + def __next__ (self): + if self.count == self.size: + raise StopIteration + + count = self.count + self.count = self.count + 1 + return '[%d]' % count, (self.begin + count).dereference() + + def __init__(self, typename, val): + self.typename = typename + self.val = val + if val.type.template_argument(1) == gdb.parse_and_eval('static_cast<std::size_t>(-1)'): + self.size = val['_M_extent']['_M_extent_value'] + else: + self.size = val.type.template_argument(1) + + def to_string(self): + return '%s of length %d' % (self.typename, self.size) + + def children(self): + return self._iterator(self.val['_M_ptr'], self.size) + + def display_hint(self): + return 'array' + # A "regular expression" printer which conforms to the # "SubPrettyPrinter" protocol from gdb.printing. class RxPrinter(object): @@ -2170,6 +2207,7 @@ def build_libstdcxx_dictionary (): libstdcxx_printer.add_version('std::', 'partial_ordering', StdCmpCatPrinter) libstdcxx_printer.add_version('std::', 'weak_ordering', StdCmpCatPrinter) libstdcxx_printer.add_version('std::', 'strong_ordering', StdCmpCatPrinter) + libstdcxx_printer.add_version('std::', 'span', StdSpanPrinter) # Extensions. libstdcxx_printer.add_version('__gnu_cxx::', 'slist', StdSlistPrinter) |