patterns
proposal-pattern-matching
patterns | proposal-pattern-matching | |
---|---|---|
8 | 67 | |
643 | 5,344 | |
- | 0.9% | |
0.0 | 9.0 | |
over 4 years ago | 9 days ago | |
C++ | HTML | |
Boost Software License 1.0 | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
patterns
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Language design bullshitters
std::visit, std::holds_alternative, std::get, ... and this library disagree with you.
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A new privilege escalation vulnerability in the Linux kernel, enables a local attacker to execute malware on vulnerable systems
I agree, good syntax makes it better, and even with something pretty good by C++ standards Rust still feels a lot less busy (interestingly the library I linked is the precursor to a candidate for addition to C++23).
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C++23: The <expected> header; expect the unexpected
mpark/patterns
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Python switch statement ftw (finally)
What? C++ will get pattern matching even later than python (C++23)
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Was your first day with Python just like that?
Match...case is not a replacement to switch statements. It's something called Pattern Matching. It's pretty common in functional languages (Haskell had pattern matching since forever) but it's becoming more mainstream nowadays. Rust has pattern matching and there are proposals to add pattern matching to C++ and JavaScript.
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Talking Async Ep1: Why C++20 is the Awesomest Language for Network Programming
The variant approach was chosen with half an eye towards the pattern matching proposal. For example:
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match(it): A light-weight header-only pattern-matching library for C++17.
So is this just a copy of https://github.com/mpark/patterns or what?
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Cpp be kinda a asshole about memory
What C++ does not do but Rust does, is functional-style pattern matching of these options, as seen in languages like Scala (2004), Haskell (1990) and Standard ML (1983) since seemingly forever. Worth noting is that there are some pretty impressive libraries out there that does this for C++ too, and it's currently a proposal for C++23.
proposal-pattern-matching
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Coming to grips with JS: a Rubyist's deep dive
Note, however, that there is a proposal to add pattern matching to JS.
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Level up your Typescript game, functionally - Part 2
There's an ECMAScript proposal that is in the works to add this feature to the language! It's going to look something like this.
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Building React Components Using Unions in TypeScript
More importantly, TypeScript typically commits to build things into itself when the proposal in JavaScript reaches Stage 3. The pattern matching proposal in JavaScript is Stage 1, but depends on many other proposals as well that may or may not need to be at Stage 3 as well for it to work. This particular proposal is interested on pattern matching on JavaScript Objects and other primitives, just like Python does with it’s native primitives. These are also dynamic types which helps in some areas, but makes it harder than others. Additionally, the JavaScript type annotations proposal needs to possibly account for this. So it’s going to be awhile. Like many years.
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Explicit Software Design. Preliminary Conclusions
For true™ functional programming in JS, native pattern matching and partial function application are missing (at least for now: 1, 2). For proper OOP, it lacks real interfaces and compile-time dependency injection.
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TypeScript Is Surprisingly OK for Compilers
The proposal for pattern matching syntax seems more akin to what they're looking for.
https://github.com/tc39/proposal-pattern-matching
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[AskJS] C# in every Node.js job posting?
There's a proposal to add something like that to JavaScript but it's been stuck in limbo since 2017 although there are libraries like ts-pattern which implement it already.
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[AskTS] What do you think will be the future of runtime type checking?
I'll admit, it is easy to assert that the TypeScript language should not be involved in the matters of packages but I also wonder if we're moving towards a point where interfaces will be as common as namespaces and whether or not it would be sensible for the language to incorporate such type assertions into the language formally, after all, it already compiles to various forms of JavaScript and there is a stage 1 proposal submitted to the TC39 committee to give JavaScript pattern matching. If adopted, wouldn't it make sense to allow TypeScript to compile a type into a type guard for the native JavaScript pattern matcher?
- Updates from the 96th TC39 meeting
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Mostly adequate guide to FP (in JavaScript)
Both are active tc39 proposals :)
https://github.com/tc39/proposal-pipeline-operator - Stage 2
https://github.com/tc39/proposal-pattern-matching - Stage 1
Hopefully we get both in the next couple of years.
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CoffeeScript for TypeScript
We often add promising TC39 proposals into Civet so people can experiment without waiting.
We've added https://github.com/tc39/proposal-pipeline-operator, a variant of https://github.com/tc39/proposal-pattern-matching, a variant of https://github.com/tc39/proposal-string-dedent and others.
Since our goal is to be 99% compatible with ES we'll need to accommodate any proposals that become standard and pick up anything TC39 leaves on the table (rest parameters in any position, etc.)
What are some alternatives?
talking-async - Example programs for Talking Async videos
fp-ts - Functional programming in TypeScript
cling - The cling C++ interpreter
package.elm-lang.org - website for browsing packages and exploring documentation
scelta - (experimental) Syntactic sugar for variant and optional types.
content - The content behind MDN Web Docs
C11parser - A correct C89/C90/C99/C11/C18 parser written using Menhir and OCaml
ecma262 - Status, process, and documents for ECMA-262
proposal-pipeline-operator - A proposal for adding a useful pipe operator to JavaScript.
proposal-record-tuple - ECMAScript proposal for the Record and Tuple value types. | Stage 2: it will change!
ts-pattern - 🎨 The exhaustive Pattern Matching library for TypeScript, with smart type inference.
xstate - Actor-based state management & orchestration for complex app logic.