azula
te
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azula
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An Introduction to Crystal
It‘s not the Hello World that takes 8s to compile, it‘s the author‘s project Azula (https://github.com/azula-lang/azula)
te
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rust-like traits on plain C++ with short macro (type erasure actually)
Or dyno or Poly or Not-Actually-Boost.TE or ...
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C++ Polymorphism Without Inheritance Using Glaze
https://github.com/boost-ext/te Boost TE ("unnoficial boost project")
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[C++20] New way of meta-programming?
https://github.com/boost-ext/te (for SBO performance and type.erasure call syntax)
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Type Erasure in C++ Explained
And if it were in the standard there wouldn't be at least five well known libraries implementing it (including from Adobe and from Facebook): https://github.com/boost-ext/te#similar-libraries
As far as I know (I don't really follow the committee work) the latest attempt to introduce run-time duck-typing in the standard was https://github.com/andyprowl/virtual-concepts, which seems dead.
What are some alternatives?
schedule.cr - :clock3: Run periodic tasks in Crystal
dyno - Runtime polymorphism done right
backtracer.cr - Crystal shard aiming to assist with parsing backtraces into a structured form.
actix-net - A collection of lower-level libraries for composable network services.
packages - List of packages for Nimble
glaze - Extremely fast, in memory, JSON and interface library for modern C++
ante - A safe, easy systems language
entt - Gaming meets modern C++ - a fast and reliable entity component system (ECS) and much more
nim-neo4j - A Nim driver for the Neo4j graph database.
hsm - Finite state machine library based on the boost hana meta programming library. It follows the principles of the boost msm and boost sml libraries, but tries to reduce own complex meta programming code to a minimum.
mollusc - Pure-Rust libraries for parsing, interpreting, and analyzing LLVM
mp - C++20 Meta-Programming library