[libcxx-commits] [libcxx] [libc++] constexpr flat_map (PR #137453)

[via libcxx-commits]

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@@ -1304,6 +1304,9 @@ module std [system] {
 
     header "flat_map"
     export *
+    export std.algorithm.ranges_sort
+    export std.ranges.zip_view
+    export std.tuple
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huixie90 wrote:

The short answer: I don't think I have any clue on how clang modules work exactly. I don't even know why exporting these are required at all. These things are all internal details of the implementation of `flat_map` and the users will not touch them at all. Their headers are properly included directly by `flat_map.h`.

However, as soon as I added `constexpr` to the member functions, I got loads of *linker* errors about the missing symbols like `__intro_sort<.....>`

https://github.com/llvm/llvm-project/pull/137453