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1 // This comes from the issue report of MSVC
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2 // (https://developercommunity.visualstudio.com/t/c20-modules-unresolved-external-symbol/10049210).
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3 //
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4 // RUN: rm -rf %t
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5 // RUN: mkdir %t
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6 // RUN: split-file %s %t
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7 //
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8 // RUN: %clang_cc1 -std=c++20 %t/base.cppm -emit-module-interface -o %t/package-base.pcm
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9 // RUN: %clang_cc1 -std=c++20 %t/child.cppm -emit-module-interface -o %t/package-child.pcm \
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10 // RUN: -fprebuilt-module-path=%t
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11 // RUN: %clang_cc1 -std=c++20 %t/package.cppm -emit-module-interface -o %t/package.pcm \
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12 // RUN: -fprebuilt-module-path=%t
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13 // RUN: %clang_cc1 -std=c++20 %t/use.cpp -fsyntax-only -verify -fprebuilt-module-path=%t
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14
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15 //--- base.cppm
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16 export module package:base;
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17
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18 export struct child;
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19
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20 export
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21 template<class> struct base
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22 {
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23 child getChild();
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24 };
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25
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26
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27 //--- child.cppm
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28 export module package:child;
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29
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30 import :base;
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31
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32 export struct child : base<void> {};
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33
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34 template<class T>
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35 child base<T>::getChild() { return {}; }
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36
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37 //--- package.cppm
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38 export module package;
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39
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40 export import :base;
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41 export import :child;
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42
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43 //--- use.cpp
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44 // expected-no-diagnostics
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45 import package;
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46
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47 int use()
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48 {
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49 base<void>{}.getChild();
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50 base<int>{}.getChild();
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51 return 0;
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52 }
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