Regular Expression Capture Groups

• Capture groups:

  
  use regex::Regex;
  
  let re = Regex::new(r"(\w+)").unwrap();
  let text = "Hello world";
  
  for cap in re.captures_iter(text) {
      println!("Match: {}", &cap[1]);
  }
  
  

• Named capture groups:

  
  use regex::Regex;
  
  let re = Regex::new(r"(?<word>\w+)").unwrap();
  let text = "Hello world";
  
  for cap in re.captures_iter(text) {
      println!("Match: {}", &cap["word"]);
  }
  
  

Setup Neovim for Rust Development

1. Install Neovim
2. Install AstroNvim
   • After installed AstroNvim, you can customise it
3. Install rust LSP
   In Neovim, execute command:

   :LspInstall rust

4. Install rust language parser (tree-sitter)
   In Neovim, execute command:

   :TSInstall rust

5. Install lua language parser (tree-sitter)
   In Neovim, execute command:

   :TSInstall lua

   This is useful for editting the Neovim config (lua) files (*.lua)

See also

• [Video] How I configure Neovim on my Mac to make it amazing
• Get started with AstroNvim
• Using Neovim for Rust Development
• Rust and Neovim - A Thorough Guide and Walkthrough
• NvChad Install

Change Rust install location

By default, Rust will be installed to home directory: ~/.cargo and ~/.rustup. To change the location,

• Set CARGO_HOME and RUSTUP_HOME environment variable before installation
• Install Rust using rust-init
• Update PATH environment variable to install $CARGO_HOME/bin

see also

• Overriding Rust installation default paths `$HOME/.cargo` and `$HOME/.rustup`

Install Rust on Windows 10 with msys2

• Install MSYS2
• Update MSYS2 packages by executing

  pacman -Sy
  pacman -Syu

  in MSYS2 Terminal
• Install git and mingw-w64-x86_64-toolchain in MSYS2 terminal:

  pacman -S git
  pacman -S mingw-w64-x86_64-toolchain

• Install mingw-w64-x86_64-rust in MSYS2 terminal:

  pacman -S mingw-w64-x86_64-rust

  Now the rust compiler is installed. You can stop here if you do not need rustup to manage the Rust compiler environment.
• To use rustup, clone the git repository:

  git clone https://github.com/rust-lang/rustup.git

• Compile and run rustup:

  cd rustup
  cargo run --release

  Rustup will detects the previous install rust compiler and asks to uninstall it before you can continue. You need to open a new MSYS2 terminal and run

  pacman -R mingw-w64-x86_64-rust

  and then go back to the rustup installation terminal, choose yes to continue the installation.
  On the next question choose: Custom installation and chose as host triple: x86_64-pc-windows-gnu
• After rustup installation, the cargo command will be install to $HOME/.cargo/bin. You will need to install it in your PATH environment variable.

Install Rust on Windows 10

1. Download and install Microsoft C++ Build Tools
• while installing, check Desktop development with C++ under Workloads tab.
• 
2. Download rust-init.exe from https://www.rust-lang.org/tools/install, and execute it to install.

see also

• https://www.rust-lang.org/tools/install
• rustup does not recognize Visual C++ Build Tools

Uninstall Rust using rustup

rustup self uninstall