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Because I am not knowledgeable about D runtime I can not say that it will not cause any conflicts with Rust assumptions (thus the use of "probably"). For example, IIRC there are serious issues with integrating Go code into a Rust project. If D code is compiled in the betterC mode, then there should not be any problems.

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There are serious considerations for including Go code in a rust project, but it's not like there are any showstoppers - one just can't use the default runtime and must rely on Cgo, and the FFI entry points are not performant. Other than that, it's relatively painless. Far less painful than calling into the JVM IMO.

You can link in and interop fine with C/C++ as long as you link in the D runtime, kind of how you can mix C and C++ by linking in libcxx.

D's betterC mode ensures that the binary can run purely on libc without D's runtime library. It's kind of like being able to link and execute C++ code without needing libcxx.

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