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Nim programming language - DevFest Berlin 2019
Fred evaluated several programming languages for a new project based on requirements of safety, portability, performance, expressiveness and elegance. The top candidates were Rust, Go and Nim. Nim is a multi-paradigm language created in 2005 with a focus on portability across operating systems and CPUs. It uses a garbage collector for memory management and supports features like generics, metaprogramming and concurrency.
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Nim programming language - DevFest Berlin 2019
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- 5. Quest for anew language Requirements: ● Safe ● Portable ● Performant ● Expressive ● Elegant Candidates: 1. Rust 2. Go 3. Nim
- 7. ● 2005: AndreasRumpf ● Community-driven ● Imperative ● Multi-paradigm ● Current release: 1.0.2 Origins
- 8. © Nim InAction, Dominik Picheta, Manning Publications, 2016 Portability
- 9. ● nim ccc:gcc myproject.nim ● nim c --cpu:i386 --os:linux --compileOnly --genScript myproject.nim ● nim c --cpu:arm --os:linux myproject.nim ● nim c -d:mingw myproject.nim ● nim c --os:nintendoswitch myproject.nim --passC="-I$DEVKITPRO/libnx/include" --passL="-specs=$DEVKITPRO/libnx/switch.specs -L$DEVKITPRO/libnx/lib -lnx" Compilation
- 10. ● FFI ● Wrappingcode or libraries (see next slide) ● c2nim = Parse a C file and generate equivalent Nim code Interoperability with C-family languages
- 11. ● Non-tracing GC ●Can be customised ○ GC_setMaxPause(MaxPauseInUs: int) ○ GC_step(us: int, strongAdvice = false, stackSize = -1) ● Can be turned off ○ GC_disable() Garbage Collection
- 12. Tooling ● $> choosenim0.12 ● $> nimble install nake ● Sublime, vim, VS Code, Aporia Editor
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- 14. Statically typed +variable state
- 15. Functions - classicreturn
- 16. Functions - implicitreturn
- 17. Functions - returningresult
- 18. Functions - styleagnostic calls
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- 25. Functional programming Side-effect checking Built-infunctional style
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- 32. Macros ● Modify the AST ●See example
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- 34. Macros Compile-time function execution (CTFE) Nimin Action, Dominik Picheta, Manning Publications 2016
- 35. Compile-time Function Execution proc fillString():string = result = "" echo("Generating string") for i in 0 .. 4: result.add($i) const count = fillString()
- 36. NimScript Embedded scripts let script1= compileScript("script1.nims") let result = script1.call
- 37. Other features - Deferredcode execution - Iterators - staticExec - {.emit.} - - Asm
- 38. Why Nim? ❏ Portability ❏High Performance ❏ Compatibility ❏ Excellent type system ❏ Syntactic sugar ❏ Strong Concurrency & Parallelism
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