base on Borgo is a statically typed language that compiles to Go. # The Borgo Programming Language  ---  I want a language for writing applications that is more expressive than Go but less complex than Rust. Go is simple and straightforward, but I often wish it offered more type safety. Rust is very nice to work with (at least for single threaded code) but it's too broad and complex, sometimes painfully so. **Borgo is a new language that transpiles to Go**. It's fully compatible with existing Go packages. Borgo syntax is similar to Rust, with optional semi-colons. # Tutorial Check out the **[online playground](https://borgo-lang.github.io/)** for a tour of the language. You can also take a look at test files for working Borgo code: - [codegen-emit.md](compiler/test/codegen-emit.md) - [infer-expr.md](compiler/test/infer-expr.md) - [infer-file.md](compiler/test/infer-file.md) # Features ## Algebraic data types and pattern matching ```rust use fmt enum NetworkState { Loading, Failed(int), Success(string), } let msg = match state { NetworkState.Loading => "still loading", NetworkState.Failed(code) => fmt.Sprintf("Got error code: %d", code), NetworkState.Success(res) => res, } ``` --- ## `Option<T>` instead of `nil` ```rust // import packages from Go stdlib use fmt use os let key = os.LookupEnv("HOME") match key { Some(s) => fmt.Println("home dir:", s), None => fmt.Println("Not found in env"), } ``` --- ## `Result<T, E>` instead of multiple return values ```rust use fmt use net.http fn makeRequest() -> Result<int, error> { let request = http.Get("http://example.com") match request { Ok(resp) => Ok(resp.StatusCode), Err(err) => Err(fmt.Errorf("failed http request %w", err)) } } ``` --- ## Error handling with `?` operator ```rust use fmt use io use os fn copyFile(src: string, dst: string) -> Result<(), error> { let stat = os.Stat(src)? if !stat.Mode().IsRegular() { return Err(fmt.Errorf("%s is not a regular file", src)) } let source = os.Open(src)? defer source.Close() let destination = os.Create(dst)? defer destination.Close() // ignore number of bytes copied let _ = io.Copy(destination, source)? Ok(()) } ``` --- ## Guessing game example Small game from the Rust book, implemented in Borgo. Things to note: - import packages from Go stdlib - `strconv.Atoi` returns an `Option<int>` - `Reader.ReadString` returns a `Result<string, error>` (which can be unwrapped) ```rust use bufio use fmt use math.rand use os use strconv use strings fn main() { let reader = bufio.NewReader(os.Stdin) let secret = rand.Intn(100) + 1 loop { fmt.Println("Please input your guess.") let text = reader.ReadString('\n').Unwrap() let text = strings.TrimSpace(text) let guess = match strconv.Atoi(text) { Ok(n) => n, Err(_) => continue, } fmt.Println("You guessed: ", guess) if guess < secret { fmt.Println("Too small!") } else if guess > secret { fmt.Println("Too big!") } else { fmt.Println("Correct!") break } } } ``` ## Running locally Borgo is written in Rust, so you'll need `cargo`. To compile all `.brg` files in the current folder: ```bash $ cargo run -- build ``` The compiler will generate `.go` files, which you can run as normal: ```bash # generate a go.mod file if needed # $ go mod init foo $ go run . ``` ", Assign "at most 3 tags" to the expected json: {"id":"9827","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"