6e4f870a21
We need to be able to distinguish individual TUs from the same module in cases where TU-local entities either need to be hidden (or, for some cases of ADL in template instantiation, need to be detected as exposures). This creates a module type for the implementation which implicitly imports its primary module interface per C++20: [module.unit/8] 'A module-declaration that contains neither an export-keyword nor a module-partition implicitly imports the primary module interface unit of the module as if by a module-import-declaration. Implementation modules are never serialized (-emit-module-interface for an implementation unit is diagnosed and rejected). Differential Revision: https://reviews.llvm.org/D126959
76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
// RUN: rm -rf %t
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// RUN: mkdir %t
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// RUN: split-file %s %t
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// RUN: %clang_cc1 -std=c++20 %t/M.cppm -verify
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// RUN: %clang_cc1 -std=c++20 %t/M.cppm -emit-module-interface -o %t/M.pcm
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// RUN: %clang_cc1 -std=c++20 -fmodule-file=M=%t/M.pcm %t/M.cpp -verify
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//
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// RUN: %clang_cc1 -std=c++20 -fmodule-file=M=%t/M.pcm %t/user.cpp -verify
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//--- M.cppm
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// expected-no-diagnostics
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export module M;
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export int external_linkage_var;
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int module_linkage_var;
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static int internal_linkage_var;
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export void external_linkage_fn() {}
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void module_linkage_fn() {}
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static void internal_linkage_fn() {}
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export struct external_linkage_class {};
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struct module_linkage_class {};
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namespace {
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struct internal_linkage_class {};
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} // namespace
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void use() {
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external_linkage_fn();
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module_linkage_fn();
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internal_linkage_fn();
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(void)external_linkage_class{};
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(void)module_linkage_class{};
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(void)internal_linkage_class{};
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(void)external_linkage_var;
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(void)module_linkage_var;
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(void)internal_linkage_var;
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}
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//--- M.cpp
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module M;
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void use_from_module_impl() {
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external_linkage_fn();
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module_linkage_fn();
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internal_linkage_fn(); // expected-error {{no matching function for call to 'internal_linkage_fn'}}
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(void)external_linkage_class{};
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(void)module_linkage_class{};
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(void)external_linkage_var;
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(void)module_linkage_var;
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// FIXME: Issue #61427 Internal-linkage declarations in the interface TU
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// should not be not visible here.
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(void)internal_linkage_class{};
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(void)internal_linkage_var;
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}
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//--- user.cpp
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import M;
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void use_from_module_impl() {
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external_linkage_fn();
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module_linkage_fn(); // expected-error {{declaration of 'module_linkage_fn' must be imported}}
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internal_linkage_fn(); // expected-error {{declaration of 'internal_linkage_fn' must be imported}}
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(void)external_linkage_class{};
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(void)module_linkage_class{}; // expected-error {{undeclared identifier}} expected-error 0+{{}}
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(void)internal_linkage_class{}; // expected-error {{undeclared identifier}} expected-error 0+{{}}
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// expected-note@M.cppm:9 {{declaration here is not visible}}
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// expected-note@M.cppm:10 {{declaration here is not visible}}
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(void)external_linkage_var;
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(void)module_linkage_var; // expected-error {{undeclared identifier}}
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(void)internal_linkage_var; // expected-error {{undeclared identifier}}
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}
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