93 lines
4.3 KiB
Markdown
93 lines
4.3 KiB
Markdown
<p align="center">
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<img src="https://raw.githubusercontent.com/d5/tengolang.com/master/logo_400.png" width="200" height="200">
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</p>
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# The Tengo Language
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[](https://godoc.org/github.com/d5/tengo/script)
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[](https://goreportcard.com/report/github.com/d5/tengo)
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[](https://travis-ci.org/d5/tengo)
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**Tengo is a small, dynamic, fast, secure script language for Go.**
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Tengo is **[fast](#benchmark)** and secure because it's compiled/executed as bytecode on stack-based VM that's written in native Go.
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```golang
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/* The Tengo Language */
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each := func(seq, fn) {
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for x in seq { fn(x) }
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}
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sum := func(init, seq) {
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each(seq, func(x) { init += x })
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return init
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}
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n := sum(0, [1, 2, 3]) // == 6
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s := sum("", [1, 2, 3]) // == "123"
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```
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> Run this code in the [Playground](https://tengolang.com/?s=d01cf9ed81daba939e26618530eb171f7397d9c9)
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## Features
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- Simple and highly readable [Syntax](https://github.com/d5/tengo/blob/master/docs/tutorial.md)
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- Dynamic typing with type coercion
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- Higher-order functions and closures
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- Immutable values _(v1)_
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- Garbage collection
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- [Securely Embeddable](https://github.com/d5/tengo/blob/master/docs/interoperability.md) and [Extensible](https://github.com/d5/tengo/blob/master/docs/objects.md)
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- Compiler/runtime written in native Go _(no external deps or cgo)_
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- Executable as a [standalone](https://github.com/d5/tengo/blob/master/docs/tengo-cli.md) language / REPL
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## Benchmark
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| | fib(35) | fibt(35) | Type |
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| :--- | ---: | ---: | :---: |
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| Go | `58ms` | `3ms` | Go (native) |
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| [**Tengo**](https://github.com/d5/tengo) | `4,245ms` | `5ms` | VM on Go |
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| Lua | `1,739ms` | `3ms` | Lua (native) |
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| [go-lua](https://github.com/Shopify/go-lua) | `5,368ms` | `5ms` | Lua VM on Go |
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| [GopherLua](https://github.com/yuin/gopher-lua) | `5,408ms` | `5ms` | Lua VM on Go |
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| Python | `3,176ms` | `27ms` | Python (native) |
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| [starlark-go](https://github.com/google/starlark-go) | `15,400ms` | `5ms` | Python-like Interpreter on Go |
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| [gpython](https://github.com/go-python/gpython) | `17,724ms` | `6ms` | Python Interpreter on Go |
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| [otto](https://github.com/robertkrimen/otto) | `82,050ms` | `22ms` | JS Interpreter on Go |
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| [Anko](https://github.com/mattn/anko) | `98,739ms` | `31ms` | Interpreter on Go |
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_* [fib(35)](https://github.com/d5/tengobench/blob/master/code/fib.tengo): Fibonacci(35)_
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_* [fibt(35)](https://github.com/d5/tengobench/blob/master/code/fibtc.tengo): [tail-call](https://en.wikipedia.org/wiki/Tail_call) version of Fibonacci(35)_
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_* **Go** does not read the source code from file, while all other cases do_
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_* See [here](https://github.com/d5/tengobench) for commands/codes used_
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## References
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- [Language Syntax](https://github.com/d5/tengo/blob/master/docs/tutorial.md)
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- [Tengo Objects](https://github.com/d5/tengo/blob/master/docs/objects.md)
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- [Runtime Types](https://github.com/d5/tengo/blob/master/docs/runtime-types.md)
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- [Builtin Functions](https://github.com/d5/tengo/blob/master/docs/builtins.md)
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- [Interoperability](https://github.com/d5/tengo/blob/master/docs/interoperability.md)
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- [Tengo CLI](https://github.com/d5/tengo/blob/master/docs/tengo-cli.md)
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- [Standard Library](https://github.com/d5/tengo/blob/master/docs/stdlib.md) _(experimental)_
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## Roadmap
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### v0. _(Current)_
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Things are experimental, and, the focus is on the **core language features**, **stability**, **basic interoperability**, and the **performance optimization**.
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### [v1. Tengo as a Script Language](https://github.com/d5/tengo/labels/v1.0)
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This will be the first _versioned_ release, and, the main goal for v1 is to make Tengo as a _fast_ embeddable script language for Go, which means Tengo will be comparable to other Go-based script languages such as [Starlark](https://github.com/google/starlark-go), [Lua](https://github.com/Shopify/go-lua) [VM](https://github.com/yuin/gopher-lua)s, and [other](https://github.com/robertkrimen/otto) [interpreter](https://github.com/mattn/anko)s.
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- Interoperability with Go code
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- Sandbox environment
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- More language features
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### v2. Tengo as a Standalone Language
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- Language-level concurrency support
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- Tengo Standard Libraries
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- Native executables compilation
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- More language features
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