Macro command 

macro_rules! command {
    ($doc:ident, $cmd:literal, $( $x:expr ),*) => { ... };
    ($doc:ident, $cmd:ident, $( $x:expr ),*) => { ... };
}

This could’ve gotten real ugly if you had to do it yourself. So whenever you’ve got a latex macro you defined earlier, and want to use it, use this macro.

use rust_texas::*;
fn dummy() -> Result<(), Box<dyn std::error::Error>> {
    let mut doc = document!("article");
    command!(doc, "<your command/macro name>", "<appropriate arguments to the command>");
    Ok(())
}

doc-tests need all the stuff above to pass