[gcc r12-10225] libstdc++: Move test error_category to global scope

[Jonathan Wakely <redi@gcc.gnu.org>]

https://gcc.gnu.org/g:a0bca5584725153ad560b97a33a07e3c56f6f953

commit r12-10225-ga0bca5584725153ad560b97a33a07e3c56f6f953
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Wed Mar 13 10:02:12 2024 +0000

    libstdc++: Move test error_category to global scope
    
    A recent GDB change causes this test to fail due to missing RTTI for the
    custom_cast type. This is presumably because the custom_cat type was
    defined as a local class, so has no linkage. Moving it to local scope
    seems to fix the test regressions, and probably makes the test more
    realistic as a local class with no linkage isn't practical to use as an
    error category that almost certainly needs to be referred to in other
    scopes.
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/libstdc++-prettyprinters/cxx11.cc: Move custom_cat
            to namespace scope.
    
    (cherry picked from commit a8c7c3a40953e34f57278d224a07dc3698c64a84)

Diff:
---
 libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc b/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc
index f97640a0189..c79f0fab602 100644
--- a/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc
+++ b/libstdc++-v3/testsuite/libstdc++-prettyprinters/cxx11.cc
@@ -63,6 +63,11 @@ struct datum
 
 std::unique_ptr<datum> global;
 
+struct custom_cat : std::error_category {
+  const char* name() const noexcept { return "miaow"; }
+  std::string message(int) const { return ""; }
+};
+
 int
 main()
 {
@@ -179,10 +184,7 @@ main()
   std::error_condition ecinval = std::make_error_condition(std::errc::invalid_argument);
   // { dg-final { note-test ecinval {std::error_condition = {"generic": EINVAL}} } }
 
-  struct custom_cat : std::error_category {
-    const char* name() const noexcept { return "miaow"; }
-    std::string message(int) const { return ""; }
-  } cat;
+  custom_cat cat;
   std::error_code emiaow(42, cat);
   // { dg-final { note-test emiaow {std::error_code = {custom_cat: 42}} } }
   std::error_condition ecmiaow(42, cat);