Make safe_iterator inline friends

[Jonathan Wakely]

On 30/08/18 21:56 +0200, François Dumont wrote:
>--- a/libstdc++-v3/include/debug/safe_iterator.h
>+++ b/libstdc++-v3/include/debug/safe_iterator.h
>@@ -36,6 +36,28 @@
> #include <bits/stl_pair.h>
> #include <ext/type_traits.h>
> 
>+#define _GLIBCXX_DEBUG_VERIFY_OPERANDS(_Lhs, _Rhs, _BadMsgId, _DiffMsgId) \
>+  _GLIBCXX_DEBUG_VERIFY(!_Lhs._M_singular() && !_Rhs._M_singular(),	\
>+			_M_message(_BadMsgId)				\
>+			._M_iterator(_Lhs, #_Lhs)			\
>+			._M_iterator(_Rhs, #_Rhs));			\
>+  _GLIBCXX_DEBUG_VERIFY(_Lhs._M_can_compare(_Rhs),			\
>+			_M_message(_DiffMsgId)				\
>+			._M_iterator(_Lhs, #_Lhs)			\
>+			._M_iterator(_Rhs, #_Rhs))
>+
>+#define _GLIBCXX_DEBUG_VERIFY_CMP_OPERANDS(_Lhs, _Rhs)			\
>+  _GLIBCXX_DEBUG_VERIFY_OPERANDS(_Lhs, _Rhs, __msg_iter_compare_bad,	\
>+				 __msg_compare_different)
>+
>+#define _GLIBCXX_DEBUG_VERIFY_ORDER_OPERANDS(_Lhs, _Rhs)		\
>+  _GLIBCXX_DEBUG_VERIFY_OPERANDS(_Lhs, _Rhs, __msg_iter_order_bad,	\
>+				 __msg_order_different)

Please use "EQ" instead of "CMP" and "REL" instead of "ORDER". Those
are the names used in the standard (the relational operators like less
than are still "comparisons" so only using CMP/compare for equality is
wrong).

OK for trunk with that change.