4 releases
Uses old Rust 2015
0.1.3 | Sep 25, 2018 |
---|---|
0.1.2 | Sep 24, 2018 |
0.1.1 | Sep 24, 2018 |
0.1.0 | Sep 24, 2018 |
#23 in #attribute
9KB
94 lines
vectorize_struct
adds an procedural macro attribute that makes it possible to iterate over Trait Objects of every field of a Struct that implements a specific trait.
It only works on nightly and requires #![feature(specialization)]
.
Example
#![feature(specialization)]
extern crate vectorize_struct;
use vectorize_struct::vectorize_struct;
use std::fmt::{Debug, Display};
#[vectorize_struct(std::fmt::Display, Debug)]
struct Struct {
i: i32,
u: u32,
b: bool,
s: String,
buui: (bool, u32, u8, i16),
s2: String,
nd: NoDisplay,
}
struct NoDisplay {}
fn main() {
use vectorized_Struct::*;
let s = Struct {
i: -12,
u: 61,
b: false,
s: String::from("asd"),
buui: (true, 1, 5, -2),
s2: String::from("fgh"),
nd: NoDisplay {},
};
for (name, field) in s.vectorize() as Vec<(Fields, Option<&Display>)> {
if let Some(field) = field {
println!("{:?} can display: {}", name, field);
}
}
for (name, field) in s.vectorize() as Vec<(Fields, Option<&Debug>)> {
if let Some(field) = field {
println!("{:?} can debug: {:?}", name, field);
}
}
}
Dependencies
~2MB
~46K SLoC