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Diffstat (limited to 'src/test/ui/lint/unused/issue-47390-unused-variable-in-struct-pattern.rs')
-rw-r--r-- | src/test/ui/lint/unused/issue-47390-unused-variable-in-struct-pattern.rs | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/test/ui/lint/unused/issue-47390-unused-variable-in-struct-pattern.rs b/src/test/ui/lint/unused/issue-47390-unused-variable-in-struct-pattern.rs new file mode 100644 index 000000000..4822a9b2c --- /dev/null +++ b/src/test/ui/lint/unused/issue-47390-unused-variable-in-struct-pattern.rs @@ -0,0 +1,88 @@ +// check-pass + +#![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; //~ WARNING unused variable: `i_think_continually` + 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; + //~^ WARNING unused variable: `mut_unused_var` + //~| WARNING variable does not need to be mutable + + let (mut var, unused_var) = (1, 2); + //~^ WARNING unused variable: `var` + //~| WARNING unused variable: `unused_var` + //~| WARNING variable does not need to be mutable + // NOTE: `var` comes after `unused_var` lexicographically yet the warning + // for `var` will be emitted before the one for `unused_var`. We use an + // `IndexMap` to ensure this is the case instead of a `BTreeMap`. + + if let SoulHistory { corridors_of_light, //~ WARNING unused variable: `corridors_of_light` + mut hours_are_suns, //~ WARNING `hours_are_suns` is assigned to, but + endless_and_singing: true } = who_from_the_womb_remembered { + hours_are_suns = false; //~ WARNING unused_assignments + } + + let the_spirit = LovelyAmbition { lips: 1, fire: 2 }; + let LovelyAmbition { lips, fire } = the_spirit; //~ WARNING unused variable: `fire` + println!("{}", lips); + + let bag = Large::Suit { + case: () + }; + + // Plain struct + match bag { + Large::Suit { case } => {} //~ WARNING unused variable: `case` + }; + + // Referenced struct + match &bag { + &Large::Suit { case } => {} //~ WARNING unused variable: `case` + }; + + // Boxed struct + match Box::new(bag) { + box Large::Suit { case } => {} //~ WARNING unused variable: `case` + }; + + // Tuple with struct + match (bag,) { + (Large::Suit { case },) => {} //~ WARNING unused variable: `case` + }; + + // Slice with struct + match [bag] { + [Large::Suit { case }] => {} //~ WARNING unused variable: `case` + }; + + // Tuple struct with struct + match Tuple(bag, ()) { + Tuple(Large::Suit { case }, ()) => {} //~ WARNING unused variable: `case` + }; +} |