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A comment on Modern C++ Won't Save Us. Parent comment

Re:Modern C++ Won't Save Us by int_19h on Tuesday April 23, 2019 @03:23PM (#19731964)
Can you give an example of said "key core language facilities" that make some library implementable in C++, but not Rust?

I can give an example of the opposite: language-aware macros. No amount of C++ TMP hackery can approach a well-designed Rust DSL.

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Re:Modern C++ Won't Save Us by ncmncm on Tuesday April 23, 2019 @11:26PM (#19735303)
Rust macros understand types now? Woohoo!
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Re:Modern C++ Won't Save Us by int_19h on Wednesday April 24, 2019 @07:51PM (#19743672)
Can you clarify what you mean by "understand types"? The only thing I can think of in this context is compile-time reflection - but that's not in C++, either (yet).

Ideally, can you give a concrete example of some abstraction that can be implemented in C++ with templates, but not in Rust with generics and/or macros?

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