Gleam - Programming language

Gleam is a programming language created in 2016 by Louis Pilfold.

#70on PLDB

8Years Old

104Repos

Download source code:

git clone https://github.com/lpil/gleam

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Gleam is a statically typed functional programming language for building scalable concurrent systems. It compiles to Erlang and has straightforward interop with other BEAM languages such as Erlang, Elixir and LFE.

Tags: programming language
Gleam is developed on GitHub and has 16,825 stars
There are at least 104 Gleam repos on GitHub
Early development of Gleam happened in https://github.com/gleam-lang
Alpaca influenced the design of Gleam
Gleam compiles to Erlang or JavaScript
Gleam is written in Rust, Gleam, TOML, Markdown, JavaScript, Dockerfile, Erlang, Make, YAML, Bourne shell, CSS, HTML, Elixir, PowerShell, JSON, TypeScript
The Google BigQuery Public Dataset GitHub snapshot shows 2 users using Gleam in 2 repos on GitHub
There are 2,600 members in the Gleam subreddit
Learn Gleam on exercism.
gleam.run was registered in 2019
Read more about Gleam on the web: 1.
3 PLDB concepts link to Gleam: cloc, EYG, Gleam

Example from the web:

import gleam/io
pub fn main() {
  io.println("hello, friend!")
}

Language features

Feature	Supported	Example
Decorators	✓	@deprecated("Use new_function instead") fn old_function() { Nil }
Lists	✓	let numbers = [1, 2, 3, 4, 5]
Booleans	✓	let is_awesome = True
Floats	✓	let pi = 3.14159
Union Types	✓	type IntOrFloat { AnInt(Int) AFloat(Float) } fn int_or_float(x: IntOrFloat) { case x { AnInt(1) -> "It's an integer: 1" AFloat(1.0) -> "It's a float: 1.0" } }
Module Pattern	✓	// Gleam’s file is a module and named by the file name (and its directory path). Since there is no special syntax to create a module, there can be only one module in a file. // in file main.gleam import wibble // if wibble was in a folder called `lib` the import would be `lib/wibble` pub fn main() { wibble.identity(1) }
Type Aliases	✓	pub type Headers = List(#(String, String)) let headers: Headers = [#("Content-Type", "application/json")]
Integers	✓	let age = 30
Line Comments	✓	// This is a line comment in Gleam
Comments	✓	// This is a single-line comment // Gleam doesn't have multi-line comments // Gleam has /// and //// comments which are used for attaching documentation to code. /// is used for documenting types and functions, and should be placed immediately before the type or function it is documenting. //// is used for documenting modules, and should be placed at the top of the module.
Strings	✓	"Hello world"
Print() Debugging	✓	io.println("Hello world")
File Imports	✓	import gleam/io import unix/cat as kitty import animal/cat.{Cat, stroke}
Semantic Indentation	X	// Gleam uses curly braces for blocks, not indentation