eve
libCat
eve | libCat | |
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6 | 21 | |
848 | 58 | |
- | - | |
8.9 | 7.1 | |
7 days ago | 3 days ago | |
C++ | C++ | |
Boost Software License 1.0 | Mozilla Public License 2.0 |
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eve
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Lack of modern scientific libraries written in C
C++ offers tools for writing better APIs, and since the addition of concepts in C++20 it offers much better API enforcement. Writing an equivalent to libraries such as {fmt} or EVE is not possible in anything we’d call C.
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Library that could generate vectorized code for different instruction sets?
Here is a doc on how we suggest to do it: https://jfalcou.github.io/eve/multiarch.html Here is complete code of that example: https://github.com/jfalcou/eve/tree/main/examples/multi-arch
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SIMD intrinsics and the possibility of a standard library solution
My source for this was the statement:
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C++'s smaller cleaner language
Indeed you cannot. Then again, you couldn't write a library like fmtlib in C in the first place. I mean why do you complain about C++ features which enable you to write libraries you otherwise couldn't? How would you expect to implement equivalent libraries to EVE or mp-units in C alone?
libCat
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I hate almost all software
That's awesome! I'm working on something that sounds similar. https://github.com/cons-cat/libcat
I'd love to see your work if you're willing to share it here!
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Why Janet?
This runtime size bothers me a lot. So much that I've been working on a new runtime for C++ that breaks POSIX compatibility to keep binaries as small as they can be. The hello world with LTO is 330ish bytes right now, and I think that can get smaller. https://github.com/Cons-Cat/libCat
- Manticore 6.0.0 – a faster alternative to Elasticsearch in C++
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std::initializer_list in C++ 1/2 - Internals and Use Cases
I'm working on a library that replaces both C++ and C/POSIX standard libraries (https://github.com/Cons-Cat/libCat), but even then I need to define a few std:: namespace symbols for some features. In the case of std::initializer_list, my answer is just don't use that feature, because you don't really need it.
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Chromium accepting Rust in a clear move to copy what Mozilla have done, replace C++ source code
It's worse in the standard library than it has to be. When I refactored my traits to minimize template instantiations and lean on concepts as much as possible, I measured over 30% improvement to clean build compile times. It's not possible for the standard to do this, because it would subtly change the API. For instance, you can't instantiate or take the address of a concept, but you can for a type-trait class. No reason you'd want to do that, but you can, so they can't "break" the standard library by optimizing this.
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C++'s smaller cleaner language
This doesn't have to be true. Over the past year I've made progress towards demonstrating how even non-freestanding C++ can be written without any C or C++ standard library headers or DLLs (with large benefits). There are a few names which the compilers require to be in the std:: namespace, though, but they're very special features like source_location and construct_at with semantics that can't be expressed otherwise.
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C++ is essentially unusable without incurring undefined behavior because of it's failure to handle type punning.
This bit cast has no overhead in debug mode, and is a little bit more generally useful than std::bit_cast(), but cannot be constant evaluated. https://github.com/Cons-Cat/libCat/blob/main/src/libraries/utility/implementations/bit_cast.tpp
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Is bloat in std::unexpected expected?
It isn't that hard to put a predicate into a type. We have lambdas in an unevaluated context, CTAD, and templated type aliases. https://github.com/Cons-Cat/libCat/blob/main/src/libraries/scaredy/cat/scaredy https://github.com/Cons-Cat/libCat/blob/main/src/global_includes.hpp#L70 https://github.com/Cons-Cat/libCat/blob/main/src/libraries/linux/cat/linux#L289 You do it like this.
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CamelCase for C++?
But suppose that you have code with no standard library calls at all. Would it still make sense to choose this naming convention? This is actually possible, with a few special exceptions. GCC requires that an implementation of std::source_location has very particular class member names, GCC assigns special semantics to a few function names including std::construct_at and std::move (people seem to know it's inlined, but did you know std::move is required for move-related warnings?), and most intrusively of all, a promise_type must be snake_case. Other names can be worked around by using them into a different namespace with a different letter-case, but promise_type seems unavoidable.
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Competitive programmer using c++, but absolutely ignorant of other things the language can do here. What else can c++ do?
I use C++ for a low-level Linux runtime. Other people are using it for operating systems like SerenityOS and Zircon/Fuschia. People also use C++ for making more compilers like GCC and LLVM.
What are some alternatives?
simdutf - Unicode routines (UTF8, UTF16, UTF32) and Base64: billions of characters per second using SSE2, AVX2, NEON, AVX-512, RISC-V Vector Extension. Part of Node.js and Bun.
Magic Enum C++ - Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code
highway - Performance-portable, length-agnostic SIMD with runtime dispatch
blender-tools - 🐵 Embark Addon for Blender
aoc2021
AECforWebAssembly - A port of ArithmeticExpressionCompiler from x86 to WebAssembly, so that the programs written in the language can run in a browser. The compiler has been rewritten from JavaScript into C++.
ispc - Intel® Implicit SPMD Program Compiler
Kalman - Kalman Filter
dmd - dmd D Programming Language compiler
EA Standard Template Library - EASTL stands for Electronic Arts Standard Template Library. It is an extensive and robust implementation that has an emphasis on high performance.
fractals - Mandelbrot renderer with SIMD (NEON/AVX) acceleration.
expected - C++11/14/17 std::expected with functional-style extensions