Crate essentials

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§vivian’s essential utilities

Some nifty utilities to make some mostly-already-easy tasks easier.

Cargo.toml:

[dependencies]
vivian-essentials = "0.1"

Read the docs for all the functionality.

Guard against something that should be true, returning an error if it’s not:

essentials::guard(some_condition())?;

This is useful for ? heavy code, and is especially useful with crates like snafu:

use crate::error::UserNotVerified;
use snafu::ResultExt;

essentials::guard(user.is_verified()).context(UserNotVerified)?

Prompt a user for something with a message:

let email = essentials::prompt("What is your email address?\n> ")?;

If you miss ternaries, then this is one of the closest ways you can get without using a macro:

let discount = essentials::tern(age > 65, Discount::Senior, Discount::Regular);

ISC.