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[193.119.89.230]) by smtp.gmail.com with ESMTPSA id eu16-20020a17090af95000b0029fbfb620cdsm6077388pjb.28.2024.03.25.02.17.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Mar 2024 02:17:36 -0700 (PDT) Message-ID: <66014130.170a0220.d7c40.0e9b@mx.google.com> X-Google-Original-Message-ID: Date: Mon, 25 Mar 2024 20:17:30 +1100 From: Nathaniel Shead To: gcc-patches@gcc.gnu.org Cc: Jason Merrill , Nathan Sidwell , Patrick Palka Subject: [PATCH] c++/modules: Fix instantiation of imported temploid friends [PR114275] MIME-Version: 1.0 Content-Disposition: inline X-Spam-Status: No, score=-11.3 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, URIBL_BLACK autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Bootstrapped and regtested on x86_64-pc-linux-gnu, OK for trunk? I'm not 100% sure I've covered all places where this needs to be handled but so far this passes all the testcases I have. -- >8 -- This patch fixes a number of issues with the handling of temploid friend declarations. The primary issue is that instantiations of friend declarations should attach the declaration to the same module as the befriending class, by [module.unit] p7.1 and [temp.friend] p2; this could be a different module from the current TU, and so needs special handling. This patch only implements this for class declarations so far, as function declarations don't seem to be causing any issues with this currently, but probably should revisit for GCC 15. The other main issue here is that we can't assume that just because name lookup didn't find a definition for a hidden template class, it doesn't mean that it doesn't exist: it could be a non-exported entity that we've nevertheless streamed in from an imported module. We need to ensure that when instantiating friend classes that we return the same TYPE_DECL that we got from our imports, otherwise we will get later issues with 'duplicate_decls' (rightfully) complaining that they're different. PR c++/105320 PR c++/114275 gcc/cp/ChangeLog: * cp-tree.h (module_may_redeclare_friend_class): New. (propagate_defining_module): New. (lookup_imported_hidden_friend): New. * module.cc (imported_temploid_friends): New. (trees_out::decl_value): Write imported_temploid_friends. (trees_in::decl_value): Read it. (get_originating_module_decl): Handle instantiated friend classes being attached to a different module. (module_may_redeclare_friend_class): New. (propagate_defining_module): New. (init_modules): Initialize imported_temploid_friends. * name-lookup.cc (lookup_imported_hidden_friend): New. * pt.cc (tsubst_friend_class): Lookup imported hidden friends. Error when redeclaring the type in the wrong module. Propagate the defining module to the instantiated type. gcc/testsuite/ChangeLog: * g++.dg/modules/tpl-friend-10_a.C: New test. * g++.dg/modules/tpl-friend-10_b.C: New test. * g++.dg/modules/tpl-friend-10_c.C: New test. * g++.dg/modules/tpl-friend-11_a.C: New test. * g++.dg/modules/tpl-friend-11_b.C: New test. * g++.dg/modules/tpl-friend-12_a.C: New test. * g++.dg/modules/tpl-friend-12_b.C: New test. * g++.dg/modules/tpl-friend-12_c.C: New test. * g++.dg/modules/tpl-friend-12_d.C: New test. * g++.dg/modules/tpl-friend-12_e.C: New test. * g++.dg/modules/tpl-friend-12_f.C: New test. * g++.dg/modules/tpl-friend-13_a.C: New test. * g++.dg/modules/tpl-friend-13_b.C: New test. * g++.dg/modules/tpl-friend-13_c.C: New test. * g++.dg/modules/tpl-friend-13_d.C: New test. * g++.dg/modules/tpl-friend-13_e.C: New test. * g++.dg/modules/tpl-friend-9.C: New test. Signed-off-by: Nathaniel Shead --- gcc/cp/cp-tree.h | 3 + gcc/cp/module.cc | 96 +++++++++++++++++++ gcc/cp/name-lookup.cc | 42 ++++++++ gcc/cp/pt.cc | 20 ++++ gcc/testsuite/g++.dg/modules/tpl-friend-10.h | 0 .../g++.dg/modules/tpl-friend-10_a.C | 15 +++ .../g++.dg/modules/tpl-friend-10_b.C | 5 + .../g++.dg/modules/tpl-friend-10_c.C | 7 ++ .../g++.dg/modules/tpl-friend-11_a.C | 14 +++ .../g++.dg/modules/tpl-friend-11_b.C | 5 + .../g++.dg/modules/tpl-friend-12_a.C | 10 ++ .../g++.dg/modules/tpl-friend-12_b.C | 9 ++ .../g++.dg/modules/tpl-friend-12_c.C | 10 ++ .../g++.dg/modules/tpl-friend-12_d.C | 8 ++ .../g++.dg/modules/tpl-friend-12_e.C | 7 ++ .../g++.dg/modules/tpl-friend-12_f.C | 8 ++ .../g++.dg/modules/tpl-friend-13_a.C | 7 ++ .../g++.dg/modules/tpl-friend-13_b.C | 5 + .../g++.dg/modules/tpl-friend-13_c.C | 7 ++ .../g++.dg/modules/tpl-friend-13_d.C | 6 ++ .../g++.dg/modules/tpl-friend-13_e.C | 8 ++ gcc/testsuite/g++.dg/modules/tpl-friend-9.C | 11 +++ 22 files changed, 303 insertions(+) create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-10.h create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-10_a.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-10_b.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-10_c.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-11_a.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-11_b.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-12_a.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-12_b.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-12_c.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-12_d.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-12_e.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-12_f.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-13_a.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-13_b.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-13_c.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-13_d.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-13_e.C create mode 100644 gcc/testsuite/g++.dg/modules/tpl-friend-9.C diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h index 52d53589e51..b782385c574 100644 --- a/gcc/cp/cp-tree.h +++ b/gcc/cp/cp-tree.h @@ -7397,6 +7397,7 @@ inline bool module_exporting_p () extern module_state *get_module (tree name, module_state *parent = NULL, bool partition = false); extern bool module_may_redeclare (tree decl); +extern bool module_may_redeclare_friend_class (tree decl, tree friend_tmpl); extern bool module_global_init_needed (); extern bool module_determine_import_inits (); @@ -7412,6 +7413,7 @@ extern unsigned get_importing_module (tree, bool = false) ATTRIBUTE_PURE; extern void set_instantiating_module (tree); extern void set_defining_module (tree); extern void maybe_key_decl (tree ctx, tree decl); +extern void propagate_defining_module (tree decl, tree tmpl); extern void mangle_module (int m, bool include_partition); extern void mangle_module_fini (); @@ -7644,6 +7646,7 @@ extern bool template_guide_p (const_tree); extern bool builtin_guide_p (const_tree); extern void store_explicit_specifier (tree, tree); extern tree lookup_explicit_specifier (tree); +extern tree lookup_imported_hidden_friend (tree); extern void walk_specializations (bool, void (*)(bool, spec_entry *, void *), diff --git a/gcc/cp/module.cc b/gcc/cp/module.cc index 8aab9ea0bae..cd3acca5e52 100644 --- a/gcc/cp/module.cc +++ b/gcc/cp/module.cc @@ -2693,6 +2693,11 @@ vec *post_load_decls; typedef hash_map> keyed_map_t; static keyed_map_t *keyed_table; +/* Instantiations of temploid friends imported from another module + need to be owned by the same module as their instantiating template. + This maps these to the template that instantiated them. */ +static hash_map *imported_temploid_friends; + /********************************************************************/ /* Tree streaming. The tree streaming is very specific to the tree structures themselves. A tag indicates the kind of tree being @@ -7884,6 +7889,14 @@ trees_out::decl_value (tree decl, depset *dep) } } + if (TREE_CODE (decl) == TEMPLATE_DECL) + { + /* Write imported temploid friends so that importers can reconstruct + this information on stream-in. */ + tree* slot = imported_temploid_friends->get (decl); + tree_node (slot ? *slot : NULL_TREE); + } + bool is_typedef = false; if (!type && TREE_CODE (inner) == TYPE_DECL) { @@ -8190,6 +8203,13 @@ trees_in::decl_value () } } + if (TREE_CODE (decl) == TEMPLATE_DECL) + if (tree owner = tree_node ()) + { + bool exists = imported_temploid_friends->put (decl, owner); + gcc_assert (exists == !is_new); + } + /* Regular typedefs will have a NULL TREE_TYPE at this point. */ unsigned tdef_flags = 0; bool is_typedef = false; @@ -18717,6 +18737,12 @@ get_originating_module_decl (tree decl) && DECL_UNINSTANTIATED_TEMPLATE_FRIEND_P (decl)) decl = TYPE_NAME (DECL_CHAIN (decl)); + /* An imported temploid friend is attached to the same module the + befriending class was. */ + if (TREE_CODE (decl) == TEMPLATE_DECL) + if (tree *slot = imported_temploid_friends->get (decl)) + decl = *slot; + int use; if (tree ti = node_template_info (decl, use)) { @@ -18851,6 +18877,46 @@ module_may_redeclare (tree decl) return me && get_primary (them) == get_primary (me); } +/* Like module_may_redeclare, but compares the attachment and module + with FRIEND_TMPL rather than the current scope. */ + +bool +module_may_redeclare_friend_class (tree tmpl, tree friend_tmpl) +{ + tree inner = DECL_TEMPLATE_RESULT (tmpl); + tree friend_inner = DECL_TEMPLATE_RESULT (friend_tmpl); + + bool tmpl_attached_p = (DECL_LANG_SPECIFIC (inner) + && DECL_MODULE_ATTACH_P (inner)); + bool friend_attached_p = (DECL_LANG_SPECIFIC (friend_inner) + && DECL_MODULE_ATTACH_P (friend_inner)); + + if (!friend_attached_p) + /* We should be attached to the GMF if the befriending class is. */ + return !tmpl_attached_p; + + if (!tmpl_attached_p) + /* The befriending class is attached to a named module, so should we. */ + return false; + + module_state *me = (*modules)[0]; + module_state *them = me; + + if (DECL_LANG_SPECIFIC (inner) + && DECL_MODULE_IMPORT_P (inner)) + if (tree* slot = imported_temploid_friends->get (tmpl)) + me = import_entity_module (import_entity_index (*slot)); + + if (DECL_LANG_SPECIFIC (friend_inner) + && DECL_MODULE_IMPORT_P (friend_inner)) + them = import_entity_module (import_entity_index (friend_tmpl)); + + if (me == them) + return true; + + return me && get_primary (me) == get_primary (them); +} + /* DECL is being created by this TU. Record it came from here. We record module purview, so we can see if partial or explicit specialization needs to be written out, even though its purviewness @@ -18985,6 +19051,34 @@ maybe_key_decl (tree ctx, tree decl) vec.safe_push (decl); } +/* DECL is an instantiated friend that should be attached to the same + module that TMPL is. */ + +void +propagate_defining_module (tree decl, tree tmpl) +{ + if (!modules_p ()) + return; + + tree not_tmpl = DECL_TEMPLATE_RESULT (tmpl); + if (DECL_LANG_SPECIFIC (not_tmpl) && DECL_MODULE_ATTACH_P (not_tmpl)) + { + tree inner = DECL_TEMPLATE_RESULT (decl); + retrofit_lang_decl (inner); + DECL_MODULE_ATTACH_P (inner) = true; + } + + if (DECL_LANG_SPECIFIC (not_tmpl) && DECL_MODULE_IMPORT_P (not_tmpl)) + { + bool exists = imported_temploid_friends->put (decl, tmpl); + + /* We should only be called if lookup for an imported decl + failed in tsubst_friend_class, in which case there shouldn't + already be an entry in the map. */ + gcc_assert (!exists); + } +} + /* Create the flat name string. It is simplest to have it handy. */ void @@ -20200,6 +20294,8 @@ init_modules (cpp_reader *reader) vec_safe_reserve (entity_ary, EXPERIMENT (1, 400)); } + imported_temploid_friends = new hash_map (EXPERIMENT (1, 400)); + #if CHECKING_P note_defs = note_defs_table_t::create_ggc (1000); #endif diff --git a/gcc/cp/name-lookup.cc b/gcc/cp/name-lookup.cc index dce4caf8981..4e79ee84aa2 100644 --- a/gcc/cp/name-lookup.cc +++ b/gcc/cp/name-lookup.cc @@ -4453,6 +4453,48 @@ push_local_binding (tree id, tree decl, bool is_using) add_decl_to_level (b, decl); } +/* Lookup the FRIEND_TMPL within all module imports. Used to dedup + instantiations of temploid hidden friends from imported modules. */ + +tree +lookup_imported_hidden_friend (tree friend_tmpl) +{ + tree inner = DECL_TEMPLATE_RESULT (friend_tmpl); + if (!DECL_LANG_SPECIFIC (inner) + || !DECL_MODULE_IMPORT_P (inner)) + return NULL_TREE; + + tree name = DECL_NAME (inner); + tree *slot = find_namespace_slot (current_namespace, name); + if (!slot || !*slot || TREE_CODE (*slot) != BINDING_VECTOR) + return NULL_TREE; + + /* Look in the appropriate slot, as with check_module_override. */ + binding_slot mslot; + if (named_module_p ()) + mslot = BINDING_VECTOR_CLUSTER (*slot, BINDING_SLOT_PARTITION + / BINDING_VECTOR_SLOTS_PER_CLUSTER) + .slots[BINDING_SLOT_PARTITION % BINDING_VECTOR_SLOTS_PER_CLUSTER]; + else + mslot = BINDING_VECTOR_CLUSTER (*slot, 0).slots[BINDING_SLOT_GLOBAL]; + gcc_assert (!mslot.is_lazy ()); + + tree ovl = mslot; + if (!ovl) + return NULL_TREE; + + /* We're only interested in declarations coming from the same module + of the friend class we're attempting to instantiate. */ + int m = get_originating_module (friend_tmpl); + gcc_assert (m != 0); + + for (ovl_iterator iter (ovl); iter; ++iter) + if (get_originating_module (*iter) == m) + return *iter; + + return NULL_TREE; +} + /* true means unconditionally make a BLOCK for the next level pushed. */ diff --git a/gcc/cp/pt.cc b/gcc/cp/pt.cc index 8cf0d5b7a8d..1e0d3efe5d2 100644 --- a/gcc/cp/pt.cc +++ b/gcc/cp/pt.cc @@ -11693,6 +11693,12 @@ tsubst_friend_class (tree friend_tmpl, tree args) tmpl = lookup_name (DECL_NAME (friend_tmpl), LOOK_where::CLASS_NAMESPACE, LOOK_want::NORMAL | LOOK_want::HIDDEN_FRIEND); + if (!tmpl) + /* If we didn't find by name lookup, the type may still exist but as a + 'hidden' import; we should check for this too to avoid accidentally + instantiating a duplicate. */ + tmpl = lookup_imported_hidden_friend (friend_tmpl); + if (tmpl && DECL_CLASS_TEMPLATE_P (tmpl)) { /* The friend template has already been declared. Just @@ -11701,6 +11707,16 @@ tsubst_friend_class (tree friend_tmpl, tree args) of course. We only need the innermost template parameters because that is all that redeclare_class_template will look at. */ + + if (modules_p () + && !module_may_redeclare_friend_class (tmpl, friend_tmpl)) + { + auto_diagnostic_group d; + error_at (DECL_SOURCE_LOCATION (friend_tmpl), + "cannot declare %qD in different module", tmpl); + inform (DECL_SOURCE_LOCATION (tmpl), "previously declared here"); + } + if (TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (friend_tmpl)) > TMPL_ARGS_DEPTH (args)) { @@ -11750,6 +11766,10 @@ tsubst_friend_class (tree friend_tmpl, tree args) args, tf_warning_or_error); } + /* We need to propagate the attachment of the original template to the + newly instantiated template type. */ + propagate_defining_module (tmpl, friend_tmpl); + /* Inject this template into the enclosing namspace scope. */ tmpl = pushdecl_namespace_level (tmpl, /*hiding=*/true); } diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-10.h b/gcc/testsuite/g++.dg/modules/tpl-friend-10.h new file mode 100644 index 00000000000..e69de29bb2d diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-10_a.C b/gcc/testsuite/g++.dg/modules/tpl-friend-10_a.C new file mode 100644 index 00000000000..7547326e554 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-10_a.C @@ -0,0 +1,15 @@ +// PR c++/105320 +// { dg-additional-options "-fmodules-ts -Wno-global-module" } +// { dg-module-cmi test_support } + +module; +template struct _Sp_atomic; +template struct shared_ptr { + template friend struct _Sp_atomic; + using atomic_type = _Sp_atomic; +}; +export module test_support; +export +template struct A { + shared_ptr data; +}; diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-10_b.C b/gcc/testsuite/g++.dg/modules/tpl-friend-10_b.C new file mode 100644 index 00000000000..6b88ee4258b --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-10_b.C @@ -0,0 +1,5 @@ +// PR c++/105320 +// { dg-additional-options "-fmodules-ts" } + +import test_support; +A a; diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-10_c.C b/gcc/testsuite/g++.dg/modules/tpl-friend-10_c.C new file mode 100644 index 00000000000..789bdeb64d5 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-10_c.C @@ -0,0 +1,7 @@ +// PR c++/105320 +// { dg-additional-options "-fmodules-ts" } +// { dg-module-cmi user } + +export module user; +import test_support; +A b; diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-11_a.C b/gcc/testsuite/g++.dg/modules/tpl-friend-11_a.C new file mode 100644 index 00000000000..f29eebd1a7f --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-11_a.C @@ -0,0 +1,14 @@ +// PR c++/114275 +// { dg-additional-options "-fmodules-ts -Wno-global-module" } +// { dg-module-cmi M } + +module; + +template struct T; + +template struct T { + template friend struct T; +}; + +export module M; +export template void fun() { T t; } diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-11_b.C b/gcc/testsuite/g++.dg/modules/tpl-friend-11_b.C new file mode 100644 index 00000000000..5bf79998139 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-11_b.C @@ -0,0 +1,5 @@ +// PR c++/114275 +// { dg-additional-options "-fmodules-ts" } + +import M; +int main() { fun(); } diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-12_a.C b/gcc/testsuite/g++.dg/modules/tpl-friend-12_a.C new file mode 100644 index 00000000000..216dbf62c71 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-12_a.C @@ -0,0 +1,10 @@ +// { dg-additional-options "-fmodules-ts" } +// { dg-module-cmi M:A } + +module M:A; + +template struct A { + template friend struct B; +private: + int x = 42; +}; diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-12_b.C b/gcc/testsuite/g++.dg/modules/tpl-friend-12_b.C new file mode 100644 index 00000000000..26e1c38b518 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-12_b.C @@ -0,0 +1,9 @@ +// { dg-additional-options "-fmodules-ts" } +// { dg-module-cmi M:B } + +export module M:B; +import :A; + +export template struct B { + int foo(A a) { return a.x; } +}; diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-12_c.C b/gcc/testsuite/g++.dg/modules/tpl-friend-12_c.C new file mode 100644 index 00000000000..e44c2819cfd --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-12_c.C @@ -0,0 +1,10 @@ +// { dg-additional-options "-fmodules-ts" } +// { dg-module-cmi M:C } + +export module M:C; +import :A; + +template struct B; +export template int bar(B t, U u) { + return t.foo(u); +} diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-12_d.C b/gcc/testsuite/g++.dg/modules/tpl-friend-12_d.C new file mode 100644 index 00000000000..9a575ad5046 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-12_d.C @@ -0,0 +1,8 @@ +// { dg-additional-options "-fmodules-ts" } +// { dg-module-cmi M } + +export module M; +export import :B; +export import :C; + +export int go_in_module(); diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-12_e.C b/gcc/testsuite/g++.dg/modules/tpl-friend-12_e.C new file mode 100644 index 00000000000..329d1e8b263 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-12_e.C @@ -0,0 +1,7 @@ +// { dg-additional-options "-fmodules-ts" } + +module M; + +int go_in_module() { + return bar(B{}, A{}); +} diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-12_f.C b/gcc/testsuite/g++.dg/modules/tpl-friend-12_f.C new file mode 100644 index 00000000000..c9855663fbd --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-12_f.C @@ -0,0 +1,8 @@ +// { dg-additional-options "-fmodules-ts" } + +import M; + +int main() { + B b{}; + go_in_module(); +} diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-13_a.C b/gcc/testsuite/g++.dg/modules/tpl-friend-13_a.C new file mode 100644 index 00000000000..dda5c544564 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-13_a.C @@ -0,0 +1,7 @@ +// { dg-additional-options "-fmodules-ts" } +// { dg-module-cmi M } + +export module M; +export template struct A { + template friend struct B; +}; diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-13_b.C b/gcc/testsuite/g++.dg/modules/tpl-friend-13_b.C new file mode 100644 index 00000000000..1fa5cc7b57b --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-13_b.C @@ -0,0 +1,5 @@ +// { dg-additional-options "-fmodules-ts" } + +import M; +A a; +template struct B {}; // { dg-error "different module" } diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-13_c.C b/gcc/testsuite/g++.dg/modules/tpl-friend-13_c.C new file mode 100644 index 00000000000..1f293fe0785 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-13_c.C @@ -0,0 +1,7 @@ +// { dg-additional-options "-fmodules-ts" } + +import M; +template struct B {}; // { dg-message "previously declared here" } +A a; // { dg-message "required from here" } + +// { dg-error "different module" "" { target *-*-* } 0 } diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-13_d.C b/gcc/testsuite/g++.dg/modules/tpl-friend-13_d.C new file mode 100644 index 00000000000..34eb3249186 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-13_d.C @@ -0,0 +1,6 @@ +// { dg-additional-options "-fmodules-ts" } +// { dg-module-cmi O } + +export module O; +export import M; +A a; diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-13_e.C b/gcc/testsuite/g++.dg/modules/tpl-friend-13_e.C new file mode 100644 index 00000000000..6d50bc487b3 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-13_e.C @@ -0,0 +1,8 @@ +// { dg-additional-options "-fmodules-ts" } + +template struct B {}; // { dg-message "previous declaration" } +import O; +A b; // { dg-message "required from here" } + +// specifically, B is defined in M, not O, despite the instantiation being in O +// { dg-error "conflicting declaration \[^\n\r\]* B@M" "" { target *-*-* } 0 } diff --git a/gcc/testsuite/g++.dg/modules/tpl-friend-9.C b/gcc/testsuite/g++.dg/modules/tpl-friend-9.C new file mode 100644 index 00000000000..487b44327b0 --- /dev/null +++ b/gcc/testsuite/g++.dg/modules/tpl-friend-9.C @@ -0,0 +1,11 @@ +// PR c++/114275 +// { dg-additional-options "-fmodules-ts" } +// { dg-module-cmi M } + +export module M; + +template struct A { + template friend struct B; +}; +A a; +template struct B { };