libCat
mp-units
libCat | mp-units | |
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21 | 13 | |
58 | 946 | |
- | - | |
7.1 | 9.8 | |
9 days ago | 7 days ago | |
C++ | C++ | |
Mozilla Public License 2.0 | MIT License |
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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.
mp-units
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Is it just mean, or is C# easier to learn than JavaScript or even PHP?
It's not the type system you're complaining about, though. It takes a bit of work but you can write types that include units information with no loss of performance.
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I'm a beginner making a library for unit conversion, contributions are welcome
I recommend using this as reference https://github.com/mpusz/units it probably solves the same or similar problem.
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Why is this piece of code compiling with char as c-tor argument?
Yep. And there are some libraries to provide strong-type int, depending on what you need: type_safe or even units.
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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?
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I got curious about units of measure in programming languages so I recreated xkcd/687.
How does it compare with https://github.com/mpusz/units ?
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C++ for Mathematicians
I don't have a book to recommend, but I have a fantastic library: https://github.com/mpusz/units
- Cheatsheet for the C++ core guidelines (philosophy)
- Compile-time C++ library for compile-time dimensional analysis, units/quantities
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Please Put Units in Names
Good C++ library for that topic is [0]. You can even go further and combine with something like [1] which is super helpful for kalman filters and other stuff where you have heterogeneous units in one vector.
[0] https://github.com/mpusz/units
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C++ lib for handling SI units
This seems to be on a progress to standardisation for c++23/26: https://github.com/mpusz/units
What are some alternatives?
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
awesome-hpp - A curated list of awesome header-only C++ libraries
blender-tools - 🐵 Embark Addon for Blender
quantity
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++.
UNITS - a compile-time, header-only, dimensional analysis and unit conversion library built on c++14 with no dependencies.
Kalman - Kalman Filter
tinyobjloader - Tiny but powerful single file wavefront obj loader
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.
cpp-core-guidelines-cheatsheet - Cheatsheet for the C++ core guidelines, including a set of tried-and-true guidelines, rules, and best practices about coding in C++.
expected - C++11/14/17 std::expected with functional-style extensions
zen