Ridiculously late reply, but I just came across this now. C++ 20 now has formalised concepts that can apply constraints to generic types, so this gap has been addressed.
Rust AFAIK is still missing fold expressions and variadic templates. Once you get used to these features, you wonder how did you live without them. Also, I like exceptions and method overloading. C++ also has std::error_code for those who wish to have exception less functions. The C++ FS library provides both throwing and non-throwing variants of their API.
As a polyglot programmer (forced to be one thanks to several projects), I found Rust to be the MOST complicated language - yes, even more complicated than modern C++ to learn. I learned C++ seriously only after C++ 17 and frankly all the hoopla about it being difficult was overhyped. I am actually a bit faster in C++ than in Java.
The Rust borrow checker twists my head and my code and I don't appear to focus on the problem I am attempting to solve anymore. I prefer the clean, easy, automatic memory management of modern C++ and simply following recommended safe programming practices via Core Guidelines. I can run static analysers independently of my main programming flow to avoid breaking my immersion and they catch all my bugs without interrupting me. Coding Rust gives you anxiety sometimes - you need to please the Emperor. Also, Rust compiles slower than C++.
Also Rust ecosystem is perennially in Churn - what compiled some months ago no longer compiles today. Libraries keep breaking. Stuff keeps changing all the time. C++ is well-specified and standardised language with a stable and well-defined standard library with multiple implementors. And you have a stable ecosystem with well documented libraries. And admittedly cargo is quite good but, I only started using C++ after CMake/Conan/Vcpkg won the build/packager tools war, so I never faced the old autotools+make headache that folks used to complain about.
Rust doesn't have a spec and still has only one implementation and is backed by a foundation that kicked out many of the engineers working on rust.
Frankly, Rust sounds like a lot of hype and fluff to me. But I am just an average programmer joe who is likely bad at predictions.
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Ridiculously late reply, but I just came across this now. C++ 20 now has formalised concepts that can apply constraints to generic types, so this gap has been addressed.
Rust AFAIK is still missing fold expressions and variadic templates. Once you get used to these features, you wonder how did you live without them. Also, I like exceptions and method overloading. C++ also has std::error_code for those who wish to have exception less functions. The C++ FS library provides both throwing and non-throwing variants of their API.
As a polyglot programmer (forced to be one thanks to several projects), I found Rust to be the MOST complicated language - yes, even more complicated than modern C++ to learn. I learned C++ seriously only after C++ 17 and frankly all the hoopla about it being difficult was overhyped. I am actually a bit faster in C++ than in Java.
The Rust borrow checker twists my head and my code and I don't appear to focus on the problem I am attempting to solve anymore. I prefer the clean, easy, automatic memory management of modern C++ and simply following recommended safe programming practices via Core Guidelines. I can run static analysers independently of my main programming flow to avoid breaking my immersion and they catch all my bugs without interrupting me. Coding Rust gives you anxiety sometimes - you need to please the Emperor. Also, Rust compiles slower than C++.
Also Rust ecosystem is perennially in Churn - what compiled some months ago no longer compiles today. Libraries keep breaking. Stuff keeps changing all the time. C++ is well-specified and standardised language with a stable and well-defined standard library with multiple implementors. And you have a stable ecosystem with well documented libraries. And admittedly cargo is quite good but, I only started using C++ after CMake/Conan/Vcpkg won the build/packager tools war, so I never faced the old autotools+make headache that folks used to complain about.
Rust doesn't have a spec and still has only one implementation and is backed by a foundation that kicked out many of the engineers working on rust.
Frankly, Rust sounds like a lot of hype and fluff to me. But I am just an average programmer joe who is likely bad at predictions.