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* [gcc r11-10663] libstdc++: Add pretty printer for std::initializer_list
@ 2023-04-27 22:01 Jonathan Wakely
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From: Jonathan Wakely @ 2023-04-27 22:01 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:bbe24ab6baeb021834636af58d251c7d683a845d
commit r11-10663-gbbe24ab6baeb021834636af58d251c7d683a845d
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.
(cherry picked from commit 71999fde2a454d1fa149e63825d8edbe0748c911)
Diff:
---
libstdc++-v3/python/libstdcxx/v6/printers.py | 25 ++++++++++++++++++++--
.../testsuite/libstdc++-prettyprinters/cxx11.cc | 6 ++++++
2 files changed, 29 insertions(+), 2 deletions(-)
diff --git a/libstdc++-v3/python/libstdcxx/v6/printers.py b/libstdc++-v3/python/libstdcxx/v6/printers.py
index 16bdfac8f5a..2eb1397ee2a 100644
--- a/libstdc++-v3/python/libstdcxx/v6/printers.py
+++ b/libstdc++-v3/python/libstdcxx/v6/printers.py
@@ -1629,7 +1629,7 @@ class StdErrorCodePrinter:
class StdSpanPrinter:
"Print a std::span"
- class _iterator(Iterator):
+ class iterator(Iterator):
def __init__(self, begin, size):
self.count = 0
self.begin = begin
@@ -1658,7 +1658,24 @@ 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'
@@ -2128,6 +2145,10 @@ def build_libstdcxx_dictionary ():
libstdcxx_printer.add_version('std::tr1::', 'unordered_multiset',
Tr1UnorderedSetPrinter)
+ libstdcxx_printer.add_version('std::', 'initializer_list',
+ StdInitializerListPrinter)
+
+
# These are the C++11 printer registrations for -D_GLIBCXX_DEBUG cases.
# The tr1 namespace containers do not have any debug equivalents,
# so do not register printers for them.
diff --git a/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc b/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc
index 7b5d9795df7..0545076fb6f 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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