https://github.com/ChuanqiXu9 updated https://github.com/llvm/llvm-project/pull/108493
>From b109ea29ee6d1c290766e141ce75317fbf450767 Mon Sep 17 00:00:00 2001 From: Chuanqi Xu <yedeng...@linux.alibaba.com> Date: Fri, 13 Sep 2024 13:18:43 +0800 Subject: [PATCH] [C++20] [Modules] Warn for importing implementation partition unit in interface units --- clang/include/clang/Basic/DiagnosticSemaKinds.td | 3 +++ clang/lib/Sema/SemaModule.cpp | 7 +++++++ clang/test/CXX/module/module.import/p2.cpp | 3 +-- clang/test/Modules/cxx20-10-3-ex1.cpp | 1 + 4 files changed, 12 insertions(+), 2 deletions(-) diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td index efdc058edca56d..7545a06123789d 100644 --- a/clang/include/clang/Basic/DiagnosticSemaKinds.td +++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td @@ -439,6 +439,9 @@ def warn_deprecated_literal_operator_id: Warning< "is deprecated">, InGroup<DeprecatedLiteralOperator>, DefaultIgnore; def warn_reserved_module_name : Warning< "%0 is a reserved name for a module">, InGroup<ReservedModuleIdentifier>; +def warn_import_implementation_partition_unit_in_interface_unit : Warning< + "it is not suggested to import implementation partition unit in interface unit">, + InGroup<DiagGroup<"import-implementation-partition-unit-in-interface-unit">>; def warn_parameter_size: Warning< "%0 is a large (%1 bytes) pass-by-value argument; " diff --git a/clang/lib/Sema/SemaModule.cpp b/clang/lib/Sema/SemaModule.cpp index 3b84e7bd4277fd..9a80adbde60d19 100644 --- a/clang/lib/Sema/SemaModule.cpp +++ b/clang/lib/Sema/SemaModule.cpp @@ -650,6 +650,13 @@ DeclResult Sema::ActOnModuleImport(SourceLocation StartLoc, else VisibleModules.setVisible(Mod, ImportLoc); + assert((!Mod->isModulePartitionImplementation() || getCurrentModule()) && + "We can only import a partition unit in a named module."); + if (Mod->isModulePartitionImplementation() && + getCurrentModule()->isModuleInterfaceUnit()) + Diag(ImportLoc, + diag::warn_import_implementation_partition_unit_in_interface_unit); + checkModuleImportContext(*this, Mod, ImportLoc, CurContext); // FIXME: we should support importing a submodule within a different submodule diff --git a/clang/test/CXX/module/module.import/p2.cpp b/clang/test/CXX/module/module.import/p2.cpp index ef6006811e7763..3ac76856c7cfc3 100644 --- a/clang/test/CXX/module/module.import/p2.cpp +++ b/clang/test/CXX/module/module.import/p2.cpp @@ -30,9 +30,8 @@ void test() { } //--- UseInPartA.cppm -// expected-no-diagnostics export module M:partA; -import :impl; +import :impl; // expected-warning {{it is not suggested to import implementation partition unit in interface unit}} void test() { A a; } diff --git a/clang/test/Modules/cxx20-10-3-ex1.cpp b/clang/test/Modules/cxx20-10-3-ex1.cpp index 99b88c7e442ffd..dcdc92340366ae 100644 --- a/clang/test/Modules/cxx20-10-3-ex1.cpp +++ b/clang/test/Modules/cxx20-10-3-ex1.cpp @@ -37,6 +37,7 @@ module M:PartImpl; export module M; // error: exported partition :Part is an implementation unit export import :PartImpl; // expected-error {{module partition implementations cannot be exported}} + // expected-warning@-1 {{it is not suggested to import implementation partition unit in interface unit}} //--- std10-3-ex1-tu3.cpp export module M:Part; _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits