From: Jonathan Wakely <jwakely@redhat.com>
Date: Thu, 1 Jun 2023 15:49:53 +0000 (+0100)
Subject: libstdc++: Fix PSTL test that fails in C++20
X-Git-Tag: releases/gcc-12.4.0~325
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ceb82ba594a6c24f33351eda0ae3fbb6fd6d841a;p=thirdparty%2Fgcc.git

libstdc++: Fix PSTL test that fails in C++20

This test fails in C++20 and later due to a warning:

warning: C++20 says that these are ambiguous, even though the second is reversed:
note: candidate 1: 'bool MyClass::operator==(const MyClass&)'
note: candidate 2: 'bool MyClass::operator==(const MyClass&)' (reversed)
note: try making the operator a 'const' member function
FAIL: 26_numerics/pstl/numeric_ops/transform_reduce.cc (test for excess errors)

libstdc++-v3/ChangeLog:

	* testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc:
	Add const to equality operator.

(cherry picked from commit f8403c43045cd56b5f775e1cf12a3f22feca4b58)
---

diff --git a/libstdc++-v3/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc b/libstdc++-v3/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc
index ec020b42bbb4..bec1c1412788 100644
--- a/libstdc++-v3/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc
+++ b/libstdc++-v3/testsuite/26_numerics/pstl/numeric_ops/transform_reduce.cc
@@ -68,7 +68,7 @@ class MyClass
     }
     friend MyClass operator*(const MyClass& x, const MyClass& y) { return MyClass(x.my_field * y.my_field); }
     bool
-    operator==(const MyClass& in)
+    operator==(const MyClass& in) const
     {
         return my_field == in.my_field;
     }