Crate punch_card 

punch-card

A library for making punched cards like this:

use punch_card::PunchCard;

#[rustfmt::skip]
println!("{}", std::str::from_utf8(&(
    .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..,
    ..=..=..=..=..=.. .. .. ..=..=..=..=..=..=.. ..=..=.. ..=..=..=..=..=..=.. ..=..=..=..=..=.. ..=..=..=..=..,
    ..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..=..,
    .. ..=..=..=..=..=.. .. .. ..=.. ..=.. ..=.. .. .. .. .. ..=.. ..=.. ..=.. ..=..=.. .. .. .. .. .. ..=.. ..,
    ..=.. .. .. .. ..=..=..=.. .. .. .. .. .. ..=..=..=..=.. .. .. .. .. .. ..=.. .. ..=.. ..=..=.. .. .. .. ..,
    .. ..=..=.. .. .. ..=..=.. .. .. ..=..=.. ..=.. ..=..=.. .. .. ..=..=.. ..=.. ..=..=.. .. ..=.. .. .. ..=..,
    .. .. .. .. ..=..=..=..=..=..=.. .. .. ..=..=.. ..=..=..=..=.. .. .. ..=..=.. .. ..=..=.. .. ..=.. ..=.. ..,
    .. .. .. .. ..=.. ..=..=..=.. ..=.. ..=..=.. ..=..=..=..=.. ..=.. ..=..=..=.. ..=.. ..=.. ..=..=..=.. .. ..,
).punch_card()).unwrap());

Why?

I saw the punch_card example in weird-exprs.rs and (inspired by analog_literals) thought “what if that was useful?” and then created this.

Usage

Run .punch_card() on a card tuple to convert it into an array of values

By default, punch-card supports the following sizes of card:

• n × 1 → array of bool
• n × 8 → array of u8 (probably the one you’ll be using the most)
• n × 16 → array of u16
• n × 32 → array of u32
• n × 64 → array of u64
• n × 128 → array of u128

A card is simply a tuple of some amount of rows, where each row is a chain of ..’s or ..=’s terminated by a .., as shown in the above example.

Note: this uses the generic_const_exprs feature, it should be safe to use though.

Traits

PunchCard

Represents a value that is a punch card, formatted like this: