Trying to diagnose the problem with an implicit copy function breaks if the
function isn't actually a copy function.
Tested x86_64-pc-linux-gnu, applying to trunk.
gcc/cp/ChangeLog:
PR c++/95844
* decl.c (copy_fn_p): Return false for a function that is neither a
constructor nor an assignment operator.
(move_signature_fn_p): Likewise.
gcc/testsuite/ChangeLog:
PR c++/95844
* g++.dg/cpp2a/spaceship-eq10.C: New test.
---
gcc/cp/decl.c | 8 ++++++++
gcc/testsuite/g++.dg/cpp2a/spaceship-eq10.C | 11 +++++++++++
2 files changed, 19 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/cpp2a/spaceship-eq10.C
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 2f1a2f0c554..5f370e60b4e 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -14169,6 +14169,10 @@ copy_fn_p (const_tree d)
accept those as copy functions. */
return 0;
+ if (!DECL_CONSTRUCTOR_P (d)
+ && DECL_NAME (d) != assign_op_identifier)
+ return 0;
+
args = FUNCTION_FIRST_USER_PARMTYPE (d);
if (!args)
return 0;
@@ -14242,6 +14246,10 @@ move_signature_fn_p (const_tree d)
tree arg_type;
bool result = false;
+ if (!DECL_CONSTRUCTOR_P (d)
+ && DECL_NAME (d) != assign_op_identifier)
+ return 0;
+
args = FUNCTION_FIRST_USER_PARMTYPE (d);
if (!args)
return 0;
diff --git a/gcc/testsuite/g++.dg/cpp2a/spaceship-eq10.C
b/gcc/testsuite/g++.dg/cpp2a/spaceship-eq10.C
new file mode 100644
index 00000000000..93f5e253af4
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp2a/spaceship-eq10.C
@@ -0,0 +1,11 @@
+// PR c++/95844
+// { dg-do compile { target c++20 } }
+
+#include <compare>
+
+struct F {
+ [[deprecated("oh no")]] std::strong_ordering operator<=>(const F&) const =
default; // { dg-message "" }
+};
+void use_f(F f) {
+ void(f == f); // { dg-warning "deprecated" }
+}
base-commit: 08e712211efa4f969a64c69bdacf6ab45104a094
--
2.18.4
