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Ben Boeckel
386465bf83
C++ modules have two variants which are of importance to CMake:
- `CXX_MODULES`: interface modules (those using `export module M;`,
`export module M:part;`, or `module M:internal_part;`)
- `CXX_MODULE_HEADER_UNITS`: importable header units
Creating C++ modules or partitions are *not* supported in any other
source listing. This is because the source files must be installed (so
their scope matters), but not part of usage requirements (what it means
for a module source to be injected into a consumer is not clear at this
moment). Due to the way `FILE_SET` works with scopes, they are a perfect
fit as long as `INTERFACE` is not allowed (which it is not).
12 lines
126 B
C++
12 lines
126 B
C++
#ifdef _MSC_VER
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// Only MSVC supports this pattern.
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module M : internal_part;
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#else
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module M;
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#endif
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int i()
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{
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return 0;
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}
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