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//! This example demonstrates using the [attribute macro](https://doc.rust-lang.org/reference/procedural-macros.html#attribute-macros)
//! [`inline`] to expand enum fields to individual columns in a [`Table`] display.
//!
//! * Note how the optional [`inline`] argument is used to apply prefixes
//! to decomposed column headers. This is helpful for organizing tables
//! with repetitive fields that would normally result in confusing headers.
//!
//! * Note that without inlining a struct or enum field, those objects
//! must implement the [`Display`] trait as they will be represented in
//! a single column with the value of their [`ToString`] output.
use tabled::{Table, Tabled};
#[derive(Tabled)]
enum Contact {
#[tabled(inline)]
Telegram {
#[tabled(inline("tg::"))]
num: Number,
},
#[tabled(inline)]
Local(#[tabled(inline("local::"))] Number),
}
#[derive(Tabled)]
struct Number {
number: String,
code: usize,
}
impl Number {
fn new(number: &str, code: usize) -> Self {
Self {
number: number.to_string(),
code,
}
}
}
fn main() {
let data = [
Contact::Local(Number::new("654321", 123)),
Contact::Telegram {
num: Number::new("123456", 123),
},
];
let table = Table::new(data);
println!("{table}");
}
|
