[committed] libstdc++: Fix typo in _Grapheme_cluster_view::_Iterator [PR115119]

[Jonathan Wakely]

Tested x86_64-linux. Pushed to trunk, gcc-14 backport to follow.

-- >8 --

libstdc++-v3/ChangeLog:

        PR libstdc++/115119
        * include/bits/unicode.h (_Iterator::operator++(int)): Fix typo
        in increment expression.
        * testsuite/ext/unicode/grapheme_view.cc: Check post-increment
        on view's iterator.
---
 libstdc++-v3/include/bits/unicode.h                 |  6 ++++--
 libstdc++-v3/testsuite/ext/unicode/grapheme_view.cc | 11 +++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/include/bits/unicode.h 
b/libstdc++-v3/include/bits/unicode.h
index 46238143fb6..a14a17c5dfc 100644
--- a/libstdc++-v3/include/bits/unicode.h
+++ b/libstdc++-v3/include/bits/unicode.h
@@ -34,10 +34,12 @@
 #include <array>
 #include <bit>      // bit_width
 #include <charconv> // __detail::__from_chars_alnum_to_val_table
+#include <string_view>
 #include <cstdint>
 #include <bits/stl_algo.h>
 #include <bits/stl_iterator.h>
-#include <bits/ranges_base.h>
+#include <bits/ranges_base.h> // iterator_t, sentinel_t, input_range, etc.
+#include <bits/ranges_util.h> // view_interface
 
 namespace std _GLIBCXX_VISIBILITY(default)
 {
@@ -802,7 +804,7 @@ inline namespace __v15_1_0
        operator++(int)
        {
          auto __tmp = *this;
-         ++this;
+         ++*this;
          return __tmp;
        }
 
diff --git a/libstdc++-v3/testsuite/ext/unicode/grapheme_view.cc 
b/libstdc++-v3/testsuite/ext/unicode/grapheme_view.cc
index ac1e8c50b05..a3bb36e14b8 100644
--- a/libstdc++-v3/testsuite/ext/unicode/grapheme_view.cc
+++ b/libstdc++-v3/testsuite/ext/unicode/grapheme_view.cc
@@ -83,10 +83,21 @@ test_breaks()
   VERIFY( iter == gv.end() );
 }
 
+constexpr void
+test_pr115119()
+{
+  // PR 115119 Typo in _Grapheme_cluster_view::_Iterator::operator++(int)
+  uc::_Grapheme_cluster_view gv(" "sv);
+  auto it = std::ranges::begin(gv);
+  it++;
+  VERIFY( it == std::ranges::end(gv) );
+}
+
 int main()
 {
   auto run_tests = []{
     test_breaks();
+    test_pr115119();
     return true;
   };
 
-- 
2.45.0