diff mbox series

c++/modules: befriending template from current class scope

Message ID 20240226205223.2403105-1-ppalka@redhat.com
State Unresolved
Headers
Series c++/modules: befriending template from current class scope |

Checks

Context Check Description
snail/gcc-patch-check warning Git am fail log

Commit Message

Patrick Palka Feb. 26, 2024, 8:52 p.m. UTC 
  Bootstrapped and regtested on x86_64-pc-linux-gnu, does this look
OK for trunk?

-- >8 --

Here the TEMPLATE_DECL representing the template friend declaration for
B has class scope since B has class scope, but get_merge_kind assumes
all DECL_UNINSTANTIATED_TEMPLATE_FRIEND_P TEMPLATE_DECL have namespace
scope and wrongly returns MK_named instead of MK_local_friend.

gcc/cp/ChangeLog:

	* module.cc (trees_out::get_merge_kind) <case depset::EK_DECL>:
	Accomodate class-scope DECL_UNINSTANTIATED_TEMPLATE_FRIEND_P
	TEMPLATE_DECL.  Merge IDENTIFIER_ANON_P branches.

gcc/testsuite/ChangeLog:

	* g++.dg/modules/friend-7.h: New test.
	* g++.dg/modules/friend-7_a.H: New test.
	* g++.dg/modules/friend-7_b.C: New test.
---
 gcc/cp/module.cc                          | 19 +++++++++----------
 gcc/testsuite/g++.dg/modules/friend-7.h   |  5 +++++
 gcc/testsuite/g++.dg/modules/friend-7_a.H |  3 +++
 gcc/testsuite/g++.dg/modules/friend-7_b.C |  5 +++++
 4 files changed, 22 insertions(+), 10 deletions(-)
 create mode 100644 gcc/testsuite/g++.dg/modules/friend-7.h
 create mode 100644 gcc/testsuite/g++.dg/modules/friend-7_a.H
 create mode 100644 gcc/testsuite/g++.dg/modules/friend-7_b.C
diff mbox series

Patch

diff --git a/gcc/cp/module.cc b/gcc/cp/module.cc
index 106af7bdb3e..fa91c6ff9cb 100644
--- a/gcc/cp/module.cc
+++ b/gcc/cp/module.cc
@@ -10491,21 +10491,20 @@  trees_out::get_merge_kind (tree decl, depset *dep)
 		    break;
 		  }
 
-	    if (RECORD_OR_UNION_TYPE_P (ctx))
+	    if (TREE_CODE (decl) == TEMPLATE_DECL
+		&& DECL_UNINSTANTIATED_TEMPLATE_FRIEND_P (decl))
 	      {
-		if (IDENTIFIER_ANON_P (DECL_NAME (decl)))
-		  mk = MK_field;
+		mk = MK_local_friend;
 		break;
 	      }
 
-	    if (TREE_CODE (decl) == TEMPLATE_DECL
-		&& DECL_UNINSTANTIATED_TEMPLATE_FRIEND_P (decl))
-	      mk = MK_local_friend;
-	    else if (IDENTIFIER_ANON_P (DECL_NAME (decl)))
+	    if (IDENTIFIER_ANON_P (DECL_NAME (decl)))
 	      {
-		if (DECL_IMPLICIT_TYPEDEF_P (decl)
-		    && UNSCOPED_ENUM_P (TREE_TYPE (decl))
-		    && TYPE_VALUES (TREE_TYPE (decl)))
+		if (RECORD_OR_UNION_TYPE_P (ctx))
+		  mk = MK_field;
+		else if (DECL_IMPLICIT_TYPEDEF_P (decl)
+			 && UNSCOPED_ENUM_P (TREE_TYPE (decl))
+			 && TYPE_VALUES (TREE_TYPE (decl)))
 		  /* Keyed by first enum value, and underlying type.  */
 		  mk = MK_enum;
 		else
diff --git a/gcc/testsuite/g++.dg/modules/friend-7.h b/gcc/testsuite/g++.dg/modules/friend-7.h
new file mode 100644
index 00000000000..c0f00394f3b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/friend-7.h
@@ -0,0 +1,5 @@ 
+template<class T>
+struct A {
+  template<class U> struct B { };
+  template<class U> friend struct B;
+};
diff --git a/gcc/testsuite/g++.dg/modules/friend-7_a.H b/gcc/testsuite/g++.dg/modules/friend-7_a.H
new file mode 100644
index 00000000000..e750e4c7d8d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/friend-7_a.H
@@ -0,0 +1,3 @@ 
+// { dg-additional-options "-fmodule-header" }
+// { dg-module-cmi {} }
+#include "friend-7.h"
diff --git a/gcc/testsuite/g++.dg/modules/friend-7_b.C b/gcc/testsuite/g++.dg/modules/friend-7_b.C
new file mode 100644
index 00000000000..d90b685d89d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/friend-7_b.C
@@ -0,0 +1,5 @@ 
+// { dg-additional-options "-fmodules-ts" }
+#include "friend-7.h"
+import "friend-7_a.H";
+
+A<int> a;