Crate ward

This crate exports two macros, which are intended to replicate the functionality of Swift’s guard expression with Option<T>.

The guard! macro was created to emulate the guard let statement in Swift. This macro is only really useful for moving values out of Option<T>s into variables. The ward! macro, on the other hand, doesn’t force the creation of a variable, it only returns the value that the guard! variable would place into a variable. As such, it’s a more flexible version of the guard! macro; and probably also somewhat more Rustic.

Macros

guard

Creates a variable with the contents of a Option<T>’s Some(T), otherwise it returns early from the function. Can alternatively have an else branch, or an alternative “early return” statement, like break or continue for loops, e.g.

ward

Returns the contents of a Option<T>’s Some(T), otherwise it returns early from the function. Can alternatively have an else branch, or an alternative “early return” statement, like break or continue for loops, e.g.