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From: Jonathan Wakely <redi@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r12-8244] libstdc++: Add pretty printer for std::initializer_list Date: Mon, 25 Apr 2022 12:38:07 +0000 (GMT) [thread overview] Message-ID: <20220425123807.1A83E3858D28@sourceware.org> (raw) https://gcc.gnu.org/g:71999fde2a454d1fa149e63825d8edbe0748c911 commit r12-8244-g71999fde2a454d1fa149e63825d8edbe0748c911 Author: Philipp Fent <fent@in.tum.de> Date: Mon Apr 25 13:03:31 2022 +0100 libstdc++: Add pretty printer for std::initializer_list Re-using the std::span printer, this now shows the contents of the initializer list instead of the pointer and length members. Signed-off-by: Philipp Fent <fent@in.tum.de> libstdc++-v3/ChangeLog: * python/libstdcxx/v6/printers.py (StdSpanPrinter._iterator): Rename as iterator. (StdInitializerListPrinter): Define new printer. (build_libstdcxx_dictionary): Register new printer. * testsuite/libstdc++-prettyprinters/cxx11.cc: Check printer for initializer_list. Diff: --- libstdc++-v3/python/libstdcxx/v6/printers.py | 24 ++++++++++++++++++++-- .../testsuite/libstdc++-prettyprinters/cxx11.cc | 6 ++++++ 2 files changed, 28 insertions(+), 2 deletions(-) diff --git a/libstdc++-v3/python/libstdcxx/v6/printers.py b/libstdc++-v3/python/libstdcxx/v6/printers.py index 6d8b765f2da..c31134bcdd2 100644 --- a/libstdc++-v3/python/libstdcxx/v6/printers.py +++ b/libstdc++-v3/python/libstdcxx/v6/printers.py @@ -1657,7 +1657,7 @@ class StdRegexStatePrinter: class StdSpanPrinter: "Print a std::span" - class _iterator(Iterator): + class iterator(Iterator): def __init__(self, begin, size): self.count = 0 self.begin = begin @@ -1686,7 +1686,24 @@ class StdSpanPrinter: return '%s of length %d' % (self.typename, self.size) def children(self): - return self._iterator(self.val['_M_ptr'], self.size) + return self.iterator(self.val['_M_ptr'], self.size) + + def display_hint(self): + return 'array' + +class StdInitializerListPrinter: + "Print a std::initializer_list" + + def __init__(self, typename, val): + self.typename = typename + self.val = val + self.size = val['_M_len'] + + def to_string(self): + return '%s of length %d' % (self.typename, self.size) + + def children(self): + return StdSpanPrinter.iterator(self.val['_M_array'], self.size) def display_hint(self): return 'array' @@ -2156,6 +2173,9 @@ def build_libstdcxx_dictionary (): libstdcxx_printer.add_version('std::tr1::', 'unordered_multiset', Tr1UnorderedSetPrinter) + libstdcxx_printer.add_version('std::', 'initializer_list', + StdInitializerListPrinter) + # std::regex components libstdcxx_printer.add_version('std::__detail::', '_State', StdRegexStatePrinter) diff --git a/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc b/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc index 4262ca88bc3..621d13bd062 100644 --- a/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc +++ b/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc @@ -25,6 +25,7 @@ #include <memory> #include <iostream> #include <future> +#include <initializer_list> #include "../util/testsuite_allocator.h" // NullablePointer typedef std::tuple<int, int> ExTuple; @@ -191,6 +192,11 @@ main() std::error_code ecfut0 = std::make_error_code(std::future_errc{}); // { dg-final { note-test ecfut0 {std::error_code = {"future": 0}} } } + std::initializer_list<int> emptyIl = {}; + // { dg-final { note-test emptyIl {std::initializer_list of length 0} } } + std::initializer_list<int> il = {3, 4}; + // { dg-final { note-test il {std::initializer_list of length 2 = {3, 4}} } } + placeholder(""); // Mark SPOT use(efl); use(fl);
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