[gcc r15-283] libstdc++: Simplify std::variant comparison operators

[Jonathan Wakely]

https://gcc.gnu.org/g:6709e35457a30b2184fa8337aa4abdd2c0edaeb3

commit r15-283-g6709e35457a30b2184fa8337aa4abdd2c0edaeb3
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Mar 28 14:19:45 2024 +0000

    libstdc++: Simplify std::variant comparison operators
    
    libstdc++-v3/ChangeLog:
    
            * include/std/variant (_VARIANT_RELATION_FUNCTION_TEMPLATE):
            Simplify.

Diff:
---
 libstdc++-v3/include/std/variant | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant
index 8072e1f17a8..bf05eec9a6b 100644
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -1245,7 +1245,7 @@ namespace __variant
 # define _VARIANT_RELATION_FUNCTION_CONSTRAINTS(TYPES, OP)
 #endif
 
-#define _VARIANT_RELATION_FUNCTION_TEMPLATE(__OP, __NAME) \
+#define _VARIANT_RELATION_FUNCTION_TEMPLATE(__OP) \
   template<typename... _Types> \
     _VARIANT_RELATION_FUNCTION_CONSTRAINTS(_Types, __OP) \
     constexpr bool \
@@ -1262,22 +1262,20 @@ namespace __variant
 	        { \
 		  auto& __this_mem = std::get<__rhs_index>(__lhs);	\
                   __ret = __this_mem __OP __rhs_mem; \
+		  return; \
                 } \
-	      else \
-		__ret = (__lhs.index() + 1) __OP (__rhs_index + 1); \
             } \
-          else \
-            __ret = (__lhs.index() + 1) __OP (__rhs_index + 1); \
+	  __ret = (__lhs.index() + 1) __OP (__rhs_index + 1); \
 	}, __rhs); \
       return __ret; \
     }
 
-  _VARIANT_RELATION_FUNCTION_TEMPLATE(<, less)
-  _VARIANT_RELATION_FUNCTION_TEMPLATE(<=, less_equal)
-  _VARIANT_RELATION_FUNCTION_TEMPLATE(==, equal)
-  _VARIANT_RELATION_FUNCTION_TEMPLATE(!=, not_equal)
-  _VARIANT_RELATION_FUNCTION_TEMPLATE(>=, greater_equal)
-  _VARIANT_RELATION_FUNCTION_TEMPLATE(>, greater)
+  _VARIANT_RELATION_FUNCTION_TEMPLATE(<)
+  _VARIANT_RELATION_FUNCTION_TEMPLATE(<=)
+  _VARIANT_RELATION_FUNCTION_TEMPLATE(==)
+  _VARIANT_RELATION_FUNCTION_TEMPLATE(!=)
+  _VARIANT_RELATION_FUNCTION_TEMPLATE(>=)
+  _VARIANT_RELATION_FUNCTION_TEMPLATE(>)
 
 #undef _VARIANT_RELATION_FUNCTION_TEMPLATE