mirror of https://github.com/rust-lang/rust
89 lines
2.4 KiB
Rust
89 lines
2.4 KiB
Rust
//@ check-pass
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#![feature(box_patterns)]
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#![warn(unused)] // UI tests pass `-A unused` (#43896)
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struct SoulHistory {
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corridors_of_light: usize,
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hours_are_suns: bool,
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endless_and_singing: bool
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}
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struct LovelyAmbition {
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lips: usize,
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fire: usize
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}
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#[derive(Clone, Copy)]
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enum Large {
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Suit { case: () }
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}
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struct Tuple(Large, ());
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fn main() {
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let i_think_continually = 2; //~ WARNING unused variable: `i_think_continually`
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let who_from_the_womb_remembered = SoulHistory {
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corridors_of_light: 5,
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hours_are_suns: true,
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endless_and_singing: true
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};
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let mut mut_unused_var = 1;
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//~^ WARNING unused variable: `mut_unused_var`
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//~| WARNING variable does not need to be mutable
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let (mut var, unused_var) = (1, 2);
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//~^ WARNING unused variable: `var`
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//~| WARNING unused variable: `unused_var`
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//~| WARNING variable does not need to be mutable
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// NOTE: `var` comes after `unused_var` lexicographically yet the warning
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// for `var` will be emitted before the one for `unused_var`. We use an
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// `IndexMap` to ensure this is the case instead of a `BTreeMap`.
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if let SoulHistory { corridors_of_light, //~ WARNING unused variable: `corridors_of_light`
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mut hours_are_suns, //~ WARNING `hours_are_suns` is assigned to, but
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endless_and_singing: true } = who_from_the_womb_remembered {
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hours_are_suns = false; //~ WARNING unused_assignments
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}
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let the_spirit = LovelyAmbition { lips: 1, fire: 2 };
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let LovelyAmbition { lips, fire } = the_spirit; //~ WARNING unused variable: `fire`
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println!("{}", lips);
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let bag = Large::Suit {
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case: ()
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};
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// Plain struct
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match bag {
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Large::Suit { case } => {} //~ WARNING unused variable: `case`
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};
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// Referenced struct
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match &bag {
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&Large::Suit { case } => {} //~ WARNING unused variable: `case`
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};
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// Boxed struct
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match Box::new(bag) {
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box Large::Suit { case } => {} //~ WARNING unused variable: `case`
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};
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// Tuple with struct
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match (bag,) {
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(Large::Suit { case },) => {} //~ WARNING unused variable: `case`
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};
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// Slice with struct
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match [bag] {
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[Large::Suit { case }] => {} //~ WARNING unused variable: `case`
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};
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// Tuple struct with struct
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match Tuple(bag, ()) {
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Tuple(Large::Suit { case }, ()) => {} //~ WARNING unused variable: `case`
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};
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}
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