Esolang
Esolang is a beginner friendly dynamically typed scripting language for quick prototyping and learning functional programming.
Installation⌗
go get github.com/ahmedsaheed/esolang
or via homebrew
brew tap ahmedsaheed/esolang
brew install esolang
Usage⌗
Try it out now in a sandbox environment on your browser via the esolang playground.
Eso Expressions can evaluated on your terminal using the built-in repl
by running the command esolang -repl or via a file on your preferred text editor with the .eso extension and running the command esolang -file <filename>.
Overview⌗
| Page | Description |
|---|---|
| Language Overview | Overview of the esolang syntax & semantics |
| Examples | Code samples in esolang |
| Internals | Overview of the inner workings of esolang |
| Built-in Functions | List of built-in functions in esolang |
Inspiration⌗
This scripting language draws its core concepts from the aclaimed works of Thorson Ball’s (Writing an Interpreter in Go), Bob Nystrom (Crafting Interpretes), and the foundational SICP.
To make the language more approachable it borrows familiar concepts from popular languages like JavaScript, Golang, Ocaml as well as basic arithmetics principals
List of features⌗
| Features | Inspration | Description |
|---|---|---|
| Variable Bindings | Ocaml & JS | Variable bindings are done using let keyword |
| Conditionals | C-Family, Golang | Conditionals are done using if keyword |
| Loops | C-Family, Golang | Loops are done using while keyword |
| Arrays | JavaScript | Easy initialiasation of dictionary using [] or array_new() |
| Hash | JavaScript | A key value pair data structure student = {"name": "John Doe"} |
| Function Literals | Golang | Function literals are done using fn keyword |
| Higher Order Functions | JavaScript | Higher order functions are done using fn keyword |
| Closures | Golang | Closures are done using fn keyword |
| Error Messages | Rust | Rigid error messages |
| Tons of built-in functions | Golang | Battries includes functions to get you up an running ASAP |
Performance⌗
The performance could be improved. At current its mediocre. Evaluation stage seems to be hindering speed as its a recursive decent which traverses each AST node and interprets what its sees. Bytecode compilation solution which runs on a VM would improve the performance significantly.
Current benchmark of fib(20) using hyperfine is as follows
hyperfine 'esolang.go ./benchmarkings/bench.eso' 'python3 ./benchmarkings/bench.py'
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|---|---|---|---|---|
esolang ./benchmarkings/bench.eso | 14.6 ± 1.5 | 14.0 | 28.4 | 1.00 |
python3 ./benchmarkings/bench.py | 22.3 ± 3.8 | 21.1 | 50.1 | 1.52 ± 0.30 |