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issue-47390-unused-variable-in-struct-pattern.rs
90 lines (72 loc) · 2.02 KB
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issue-47390-unused-variable-in-struct-pattern.rs
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// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// compile-pass
#![feature(box_syntax)]
#![feature(box_patterns)]
#![warn(unused)] // UI tests pass `-A unused` (#43896)
struct SoulHistory {
corridors_of_light: usize,
hours_are_suns: bool,
endless_and_singing: bool
}
struct LovelyAmbition {
lips: usize,
fire: usize
}
#[derive(Clone, Copy)]
enum Large {
Suit { case: () }
}
struct Tuple(Large, ());
fn main() {
let i_think_continually = 2;
let who_from_the_womb_remembered = SoulHistory {
corridors_of_light: 5,
hours_are_suns: true,
endless_and_singing: true
};
let mut mut_unused_var = 1;
let (mut var, unused_var) = (1, 2);
if let SoulHistory { corridors_of_light,
mut hours_are_suns,
endless_and_singing: true } = who_from_the_womb_remembered {
hours_are_suns = false;
}
let the_spirit = LovelyAmbition { lips: 1, fire: 2 };
let LovelyAmbition { lips, fire } = the_spirit;
println!("{}", lips);
let bag = Large::Suit {
case: ()
};
// Plain struct
match bag {
Large::Suit { case } => {}
};
// Referenced struct
match &bag {
&Large::Suit { case } => {}
};
// Boxed struct
match box bag {
box Large::Suit { case } => {}
};
// Tuple with struct
match (bag,) {
(Large::Suit { case },) => {}
};
// Slice with struct
match [bag] {
[Large::Suit { case }] => {}
};
// Tuple struct with struct
match Tuple(bag, ()) {
Tuple(Large::Suit { case }, ()) => {}
};
}