1
0
mirror of https://github.com/vlang/v.git synced 2023-08-10 21:13:21 +03:00
v/README.md
Alexander Medvednikov caa6eacf39
readme: orm
2019-08-20 17:35:11 +03:00

161 lines
3.7 KiB
Markdown

# The V Programming Language 0.1.x
[![Build Status](https://travis-ci.org/vlang/v.svg?branch=master)](https://travis-ci.org/vlang/v)
<a href='https://patreon.com/vlang'><img src='https://img.shields.io/endpoint.svg?url=https%3A%2F%2Fshieldsio-patreon.herokuapp.com%2Fvlang%2Fpledges&style=for-the-badge' height='20'></a>
https://vlang.io
Documentation: https://vlang.io/docs
Twitter: https://twitter.com/v_language
Discord (primary community): https://discord.gg/n7c74HM
Installing V: https://github.com/vlang/v#installing-v-from-source
## Key Features of V
- Simplicity: the language can be learned in less than an hour
- Fast compilation: ~100k loc/s right now, ~1.2 million loc/s once x64 generation is mature enough
- Easy to develop: V compiles itself in less than a second
- Performance: within 3% of C
- Safety: no null, no globals, no undefined behavior, immutability by default
- C to V translation
- Hot code reloading
- Powerful UI and graphics libraries
- Easy cross compilation
- REPL
- Built-in ORM
V 1.0 release is planned for December 2019. Right now V is in an alpha stage.
## Notes
GitHub marks V's code as written in Go. It's actually written in V, GitHub doesn't support the language yet.
The compilation is temporarily slower for this release:
- Debug builds are used (use `./v -prod -o v compiler` to get faster compilation).
- vlib is recompiled with every program you build.
- The new formatter runs on every single token and slows the compiler down by ~20%. This will be taken care of.
## Installing V from source
### Linux, macOS, Windows, *BSD, WSL, Android, Raspbian
```bash
git clone https://github.com/vlang/v
cd v
make
```
That's it! Now you have a V executable at `[path to V repo]/v`. `[path to V repo]` can be anywhere.
### C compiler
You'll need Clang or GCC. If you are doing development, you most likely already have it installed.
On macOS run `xcode-select --install` if you don't have XCode or XCode tools.
On Windows follow these instructions: [github.com/vlang/v/wiki/Installing-a-C-compiler-on-Windows](https://github.com/vlang/v/wiki/Installing-a-C-compiler-on-Windows)
### Symlinking and updates
You can create a `/usr/local/bin/v` symlink so that V is globally available:
```
sudo make symlink
```
V is being constantly updated. To update V, simply run
```
v up
```
## Docker
```bash
git clone https://github.com/vlang/v
cd v
docker build -t vlang .
docker run --rm -it vlang:latest
v
```
### Testing and running the examples
Make sure V can compile itself:
```
v -o v compiler
```
```
$ v
V 0.1.x
Use Ctrl-D to exit
>>> println('hello world')
hello world
>>>
```
```
cd examples
v hello_world.v && ./hello_world # or simply
v run hello_world.v # this builds the program and runs it right away
v word_counter.v && ./word_counter cinderella.txt
v run news_fetcher.v
v run tetris/tetris.v
```
<img src='https://raw.githubusercontent.com/vlang/v/master/examples/tetris/screenshot.png' width=300>
In order to build Tetris and anything else using the graphics module, you will need to install glfw and freetype.
```
v install glfw
```
If you plan to use the http package, you also need to install openssl on non-Windows systems.
```
macOS:
brew install glfw freetype openssl
Debian/Ubuntu:
sudo apt install libglfw3 libglfw3-dev libfreetype6-dev libssl-dev
Arch/Manjaro:
sudo pacman -S glfw-x11 freetype2
Fedora:
sudo dnf install glfw glfw-devel freetype-devel
```
glfw dependency will be removed soon.
## Contributing
Code structure:
https://github.com/vlang/v/blob/master/CONTRIBUTING.md
If you introduce a breaking change and rebuild V, you will no longer be able to use V to build itself. So it's a good idea to make a backup copy of a working compiler executable.