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From: Jonathan Wakely <redi@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r14-7147] libstdc++: Add GDB printer for std::integral_constant Date: Thu, 11 Jan 2024 17:56:46 +0000 (GMT) [thread overview] Message-ID: <20240111175646.3B0913858005@sourceware.org> (raw) https://gcc.gnu.org/g:cd2022f39297198adad0e284f8780cb3d83d0f85 commit r14-7147-gcd2022f39297198adad0e284f8780cb3d83d0f85 Author: Jonathan Wakely <jwakely@redhat.com> Date: Wed Jan 10 10:53:43 2024 +0000 libstdc++: Add GDB printer for std::integral_constant libstdc++-v3/ChangeLog: * python/libstdcxx/v6/printers.py (StdIntegralConstantPrinter): Add printer for std::integral_constant. * testsuite/libstdc++-prettyprinters/cxx11.cc: Test it. Diff: --- libstdc++-v3/python/libstdcxx/v6/printers.py | 20 ++++++++++++++++++++ .../testsuite/libstdc++-prettyprinters/cxx11.cc | 7 +++++++ 2 files changed, 27 insertions(+) diff --git a/libstdc++-v3/python/libstdcxx/v6/printers.py b/libstdc++-v3/python/libstdcxx/v6/printers.py index bf0dc52ab8c..032a7aa58a2 100644 --- a/libstdc++-v3/python/libstdcxx/v6/printers.py +++ b/libstdc++-v3/python/libstdcxx/v6/printers.py @@ -2306,6 +2306,23 @@ class StdLocalePrinter(printer_base): mod = ' with "{}={}"'.format(cat, other) return 'std::locale = "{}"{}'.format(name, mod) +class StdIntegralConstantPrinter(printer_base): + """Print a std::true_type or std::false_type.""" + + def __init__(self, typename, val): + self._val = val + self._typename = typename + + def to_string(self): + value_type = self._val.type.template_argument(0) + value = self._val.type.template_argument(1) + if value_type.code == gdb.TYPE_CODE_BOOL: + if value: + return "std::true_type" + else: + return "std::false_type" + typename = strip_versioned_namespace(self._typename) + return "{}<{}, {}>".format(typename, value_type, value) # A "regular expression" printer which conforms to the # "SubPrettyPrinter" protocol from gdb.printing. @@ -2788,6 +2805,9 @@ def build_libstdcxx_dictionary(): # vector<bool> libstdcxx_printer.add_version('std::', 'locale', StdLocalePrinter) + libstdcxx_printer.add_version('std::', 'integral_constant', + StdIntegralConstantPrinter) + if hasattr(gdb.Value, 'dynamic_type'): libstdcxx_printer.add_version('std::', 'error_code', StdErrorCodePrinter) diff --git a/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc b/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc index bc869fd4122..f867ea18306 100644 --- a/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc +++ b/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc @@ -207,6 +207,13 @@ main() std::atomic<Value> av{{8, 9}}; // { dg-final { note-test av {std::atomic<Value> = { {i = 8, j = 9} }} } } + std::integral_constant<int, 1> one; + // { dg-final { note-test one {std::integral_constant<int, 1>} } } + std::integral_constant<bool, true> truth; + // { dg-final { note-test truth {std::true_type} } } + std::integral_constant<bool, 0> lies; + // { dg-final { note-test lies {std::false_type} } } + placeholder(""); // Mark SPOT use(efl); use(fl);
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