[committed] libstdc++: Add noexcept to some std::function internals

[Jonathan Wakely <jwakely@redhat.com>]

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libstdc++-v3/ChangeLog:

	* include/bits/std_function.h (_Any_data::_M_access): Add
	noexcept.
	(_Function_base::_Base_manager::_M_get_pointer): Likewise.
	(_Function_base::_Base_manager::_M_not_empty_function):
	Likewise.

Tested powerpc64le-linux. Committed to trunk.


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commit 9665c2e76849c8e0066c6660779ae082fce67ea8
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Mon Oct 4 15:22:58 2021

    libstdc++: Add noexcept to some std::function internals
    
    libstdc++-v3/ChangeLog:
    
            * include/bits/std_function.h (_Any_data::_M_access): Add
            noexcept.
            (_Function_base::_Base_manager::_M_get_pointer): Likewise.
            (_Function_base::_Base_manager::_M_not_empty_function):
            Likewise.

diff --git a/libstdc++-v3/include/bits/std_function.h b/libstdc++-v3/include/bits/std_function.h
index 3dda820bd1a..55738440949 100644
--- a/libstdc++-v3/include/bits/std_function.h
+++ b/libstdc++-v3/include/bits/std_function.h
@@ -82,17 +82,17 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   union [[gnu::may_alias]] _Any_data
   {
-    void*       _M_access()       { return &_M_pod_data[0]; }
-    const void* _M_access() const { return &_M_pod_data[0]; }
+    void*       _M_access()       noexcept { return &_M_pod_data[0]; }
+    const void* _M_access() const noexcept { return &_M_pod_data[0]; }
 
     template<typename _Tp>
       _Tp&
-      _M_access()
+      _M_access() noexcept
       { return *static_cast<_Tp*>(_M_access()); }
 
     template<typename _Tp>
       const _Tp&
-      _M_access() const
+      _M_access() const noexcept
       { return *static_cast<const _Tp*>(_M_access()); }
 
     _Nocopy_types _M_unused;
@@ -131,7 +131,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
 	// Retrieve a pointer to the function object
 	static _Functor*
-	_M_get_pointer(const _Any_data& __source)
+	_M_get_pointer(const _Any_data& __source) noexcept
 	{
 	  if _GLIBCXX17_CONSTEXPR (__stored_locally)
 	    {
@@ -217,22 +217,22 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
 	template<typename _Signature>
 	  static bool
-	  _M_not_empty_function(const function<_Signature>& __f)
+	  _M_not_empty_function(const function<_Signature>& __f) noexcept
 	  { return static_cast<bool>(__f); }
 
 	template<typename _Tp>
 	  static bool
-	  _M_not_empty_function(_Tp* __fp)
+	  _M_not_empty_function(_Tp* __fp) noexcept
 	  { return __fp != nullptr; }
 
 	template<typename _Class, typename _Tp>
 	  static bool
-	  _M_not_empty_function(_Tp _Class::* __mp)
+	  _M_not_empty_function(_Tp _Class::* __mp) noexcept
 	  { return __mp != nullptr; }
 
 	template<typename _Tp>
 	  static bool
-	  _M_not_empty_function(const _Tp&)
+	  _M_not_empty_function(const _Tp&) noexcept
 	  { return true; }
       };