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// RUN: rm -rf %t
// RUN: mkdir %t
// RUN: split-file %s %t
// RUN: %clang_cc1 -std=c++20 %t/M.cppm -verify
// RUN: %clang_cc1 -std=c++20 %t/M.cppm -emit-module-interface -o %t/M.pcm
// RUN: %clang_cc1 -std=c++20 -fmodule-file=M=%t/M.pcm %t/M.cpp -verify
//
// RUN: %clang_cc1 -std=c++20 -fmodule-file=M=%t/M.pcm %t/user.cpp -verify
//--- M.cppm
// expected-no-diagnostics
export module M;
export int external_linkage_var;
int module_linkage_var;
static int internal_linkage_var;
export void external_linkage_fn() {}
void module_linkage_fn() {}
static void internal_linkage_fn() {}
export struct external_linkage_class {};
struct module_linkage_class {};
namespace {
struct internal_linkage_class {};
} // namespace
void use() {
external_linkage_fn();
module_linkage_fn();
internal_linkage_fn();
(void)external_linkage_class{};
(void)module_linkage_class{};
(void)internal_linkage_class{};
(void)external_linkage_var;
(void)module_linkage_var;
(void)internal_linkage_var;
}
//--- M.cpp
module M;
void use_from_module_impl() {
external_linkage_fn();
module_linkage_fn();
internal_linkage_fn(); // expected-error {{use of undeclared identifier 'internal_linkage_fn'}} // expected-note@* {{}}
(void)external_linkage_class{};
(void)module_linkage_class{};
(void)external_linkage_var;
(void)module_linkage_var;
(void)internal_linkage_class{}; // expected-error {{use of undeclared identifier 'internal_linkage_class'}} // expected-note@* {{}}
(void)internal_linkage_var; // expected-error {{use of undeclared identifier 'internal_linkage_var'}}
}
//--- user.cpp
import M;
void use_from_module_impl() {
external_linkage_fn();
module_linkage_fn(); // expected-error {{use of undeclared identifier 'module_linkage_fn'}}
internal_linkage_fn(); // expected-error {{use of undeclared identifier 'internal_linkage_fn'}}
(void)external_linkage_class{};
(void)module_linkage_class{}; // expected-error {{undeclared identifier}} expected-error 0+{{}} // expected-note@* {{}}
(void)internal_linkage_class{}; // expected-error {{undeclared identifier}} expected-error 0+{{}} // expected-note@* {{}}
(void)external_linkage_var;
(void)module_linkage_var; // expected-error {{undeclared identifier}}
(void)internal_linkage_var; // expected-error {{undeclared identifier}}
}
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