[gcc r16-8422] libstdc++: Rename parameters of unordered erase(K&&) members

[Jonathan Wakely]

https://gcc.gnu.org/g:bc8c59ad3ab798283cbd47eb619946c140644c94

commit r16-8422-gbc8c59ad3ab798283cbd47eb619946c140644c94
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Wed Apr 1 18:11:34 2026 +0100

    libstdc++: Rename parameters of unordered erase(K&&) members
    
    This fixes some Doxygen warnings caused by inconsistent parameter names,
    which do not match the names used in the Doxygen comments:
    
    include/bits/unordered_map.h:899: warning: argument '__x' of command @param is not found in the argument list of std::unordered_map< _Key, _Tp, _Hash, _Pred, _Alloc >::erase(_Kt &&__key)
    include/bits/unordered_map.h:899: warning: The following parameter of std::unordered_map::erase(_Kt &&__key) is not documented:
      parameter '__key'
    
    libstdc++-v3/ChangeLog:
    
            * include/bits/unordered_map.h (unordered_map::erase(K&&)):
            Change parameter name to __x.
            * include/bits/unordered_set.h (unordered_set::erase(K&&))
            (unordered_multiset::erase(K&&)): Likewise.
    
    Reviewed-by: Tomasz Kamiński <tkaminsk@redhat.com>

Diff:
---
 libstdc++-v3/include/bits/unordered_map.h | 4 ++--
 libstdc++-v3/include/bits/unordered_set.h | 8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/libstdc++-v3/include/bits/unordered_map.h b/libstdc++-v3/include/bits/unordered_map.h
index 853386e9f9bc..c84a4730e320 100644
--- a/libstdc++-v3/include/bits/unordered_map.h
+++ b/libstdc++-v3/include/bits/unordered_map.h
@@ -913,8 +913,8 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 #ifdef __glibcxx_associative_heterogeneous_erasure // C++23
       template <__heterogeneous_hash_key<unordered_map> _Kt>
 	size_type
-	erase(_Kt&& __key)
-	{ return _M_h._M_erase_tr(__key); }
+	erase(_Kt&& __x)
+	{ return _M_h._M_erase_tr(__x); }
 #endif
       ///@}
 
diff --git a/libstdc++-v3/include/bits/unordered_set.h b/libstdc++-v3/include/bits/unordered_set.h
index 3585fe2c7144..e7db34151b49 100644
--- a/libstdc++-v3/include/bits/unordered_set.h
+++ b/libstdc++-v3/include/bits/unordered_set.h
@@ -656,8 +656,8 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 #ifdef __glibcxx_associative_heterogeneous_erasure // C++23
       template <__heterogeneous_hash_key<unordered_set> _Kt>
 	size_type
-	erase(_Kt&& __key)
-	{ return _M_h._M_erase_tr(__key); }
+	erase(_Kt&& __x)
+	{ return _M_h._M_erase_tr(__x); }
 #endif
 
       /**
@@ -1674,8 +1674,8 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
 #ifdef __glibcxx_associative_heterogeneous_erasure // C++23
       template <__heterogeneous_hash_key<unordered_multiset> _Kt>
 	size_type
-	erase(_Kt&& __key)
-	{ return _M_h._M_erase_tr(__key); }
+	erase(_Kt&& __x)
+	{ return _M_h._M_erase_tr(__x); }
 #endif
 
       /**