optfield

optfield is a macro that, given a struct, generates another struct with the same fields, but wrapped in Option<T>.

Minimum rustc version: 1.33.0

Install

Add with cargo edit:

cargo add optfield

or add to Cargo.toml:

[dependencies]
optfield = "0.2.0"

Use

optfield takes the opt struct name as its first argument:

use optfield::optfield;

#[optfield(Opt)]
struct MyStruct<T> {
    text: String,
    number: i32,
    generic: T,
}

This will generate another struct that looks like:

struct Opt<T> {
    text: Option<String>,
    number: Option<i32>,
    generic: Option<T>,
}

optfield supports defining visibility, documentation, attributes and merge methods. For more details and examples check its documentation.

License

Licensed under either of Apache License, Version 2.0 or MIT at your option.