9c04851cf5
This patch introduces a new kind of ModuleOwnershipKind as ReachableWhenImported. This intended the status for reachable described at: https://eel.is/c++draft/module.reach#3. Note that this patch is not intended to support all semantics about reachable semantics. For example, this patch didn't implement discarded declarations in GMF. (https://eel.is/c++draft/module.global.frag#3). This fixes: https://bugs.llvm.org/show_bug.cgi?id=52281 and https://godbolt.org/z/81f3ocjfW. Reviewed By: rsmith, iains Differential Revision: https://reviews.llvm.org/D113545
67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
// RUN: rm -rf %t
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// RUN: split-file %s %t
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// RUN: cd %t
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// RUN: %clang_cc1 -std=c++20 -emit-header-unit -xc++-header-unit-header std-10-6-ex1-decl.h \
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// RUN: -o decl.pcm
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// RUN: %clang_cc1 -std=c++20 -emit-header-unit -xc++-header-unit-header std-10-6-ex1-defn.h \
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// RUN: -o defn.pcm
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface std-10-6-ex1-stuff.cpp \
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// RUN: -o stuff.pcm
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface std-10-6-ex1-M1.cpp \
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// RUN: -fmodule-file=stuff.pcm -o M1.pcm -fmodule-file=defn.pcm
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// RUN: %clang_cc1 -std=c++20 -emit-module-interface std-10-6-ex1-M2.cpp \
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// RUN: -fmodule-file=stuff.pcm -o M2.pcm -fmodule-file=decl.pcm
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// RUN: %clang_cc1 -std=c++20 std-10-6-ex1-use.cpp \
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// RUN: -fmodule-file=M1.pcm -fmodule-file=M2.pcm -fsyntax-only -verify
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//--- std-10-6-ex1-decl.h
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struct X;
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//--- std-10-6-ex1-defn.h
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struct X {};
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//--- std-10-6-ex1-stuff.cpp
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export module stuff;
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export template <typename T, typename U> void foo(T, U u) { auto v = u; }
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export template <typename T, typename U> void bar(T, U u) { auto v = *u; }
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//--- std-10-6-ex1-M1.cpp
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export module M1;
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import "std-10-6-ex1-defn.h"; // provides struct X {};
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import stuff;
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export template <typename T> void f(T t) {
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X x;
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foo(t, x);
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}
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//--- std-10-6-ex1-M2.cpp
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export module M2;
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import "std-10-6-ex1-decl.h"; // provides struct X; (not a definition)
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import stuff;
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export template <typename T> void g(T t) {
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X *x;
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bar(t, x);
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}
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//--- std-10-6-ex1-use.cpp
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import M1;
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import M2;
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void test() {
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f(0);
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// It is unspecified whether the instantiation of g(0) is valid here.
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// We choose to make it invalid here.
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g(0); // expected-error@* {{definition of 'X' must be imported from module}}
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// expected-note@* {{in instantiation of function template specialization 'bar<int, X *>'}}
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// expected-note@* {{in instantiation of function template specialization}}
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// expected-note@* {{definition here is not reachable}}
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}
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