cc801b6570
Revival of https://github.com/llvm/llvm-project/pull/146247 which got reverted for broken test. Now that https://github.com/llvm/llvm-project/pull/146461 is merged to allow `extern "C++"` for main, we can merge this change.
96 lines
2.3 KiB
C++
96 lines
2.3 KiB
C++
// RUN: rm -rf %t
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// RUN: mkdir -p %t
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// RUN: split-file %s %t
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/test0.cpp -o %t/test0.pcm -verify
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/test1.cpp -o %t/test1.pcm -verify
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/test2.cpp -fmodule-file=foo=%t/test0.pcm -o %t/test2.pcm -verify
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface %t/test3.cpp -fmodule-file=foo=%t/test0.pcm -o %t/test3.pcm -verify
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//--- test0.cpp
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// expected-no-diagnostics
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export module foo;
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static int m;
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int n;
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export {
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int a;
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int b;
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constexpr int *p = &n;
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}
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export int c;
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namespace N {
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export void f() {}
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} // namespace N
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export struct T {
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} t;
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//--- test1.cpp
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export module foo;
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static int m;
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int n;
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struct S {
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export int n; // expected-error {{expected member name or ';'}}
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export static int n; // expected-error {{expected member name or ';'}}
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};
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int main() {} // expected-warning {{'main' never has module linkage}}
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// FIXME: Exports of declarations without external linkage are disallowed.
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// Exports of declarations with non-external-linkage types are disallowed.
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// Cannot export within another export. This isn't precisely covered by the
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// language rules right now, but (per personal correspondence between zygoloid
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// and gdr) is the intent.
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export { // expected-note {{export block begins here}}
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extern "C++" {
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namespace NestedExport {
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export { // expected-error {{export declaration appears within another export declaration}}
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int q;
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}
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} // namespace NestedExport
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}
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}
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//--- test2.cpp
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// expected-no-diagnostics
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export module foo;
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static int m;
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int n;
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//--- test3.cpp
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export module bar;
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extern "C++" int main() {}
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static int m;
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int n;
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int use_a = a; // expected-error {{use of undeclared identifier 'a'}}
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import foo; // expected-error {{imports must immediately follow the module declaration}}
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export {}
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export {
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; // No diagnostic after P2615R1 DR
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}
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export {
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static_assert(true); // No diagnostic after P2615R1 DR
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}
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int use_b = b; // expected-error{{use of undeclared identifier 'b'}}
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int use_n = n; // FIXME: this should not be visible, because it is not exported
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extern int n;
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static_assert(&n != p); // expected-error{{use of undeclared identifier 'p'}}
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