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|
// Test that the `non_exhaustive_omitted_patterns` lint is triggered correctly.
#![feature(non_exhaustive_omitted_patterns_lint, unstable_test_feature)]
// aux-build:enums.rs
extern crate enums;
// aux-build:unstable.rs
extern crate unstable;
// aux-build:structs.rs
extern crate structs;
use enums::{
EmptyNonExhaustiveEnum, NestedNonExhaustive, NonExhaustiveEnum, NonExhaustiveSingleVariant,
VariantNonExhaustive,
};
use unstable::{UnstableEnum, OnlyUnstableEnum, UnstableStruct, OnlyUnstableStruct};
use structs::{FunctionalRecord, MixedVisFields, NestedStruct, NormalStruct};
#[non_exhaustive]
#[derive(Default)]
pub struct Foo {
a: u8,
b: usize,
c: String,
}
#[non_exhaustive]
pub enum Bar {
A,
B,
C,
}
fn main() {
let enumeration = Bar::A;
// Ok: this is a crate local non_exhaustive enum
match enumeration {
Bar::A => {}
Bar::B => {}
#[deny(non_exhaustive_omitted_patterns)]
_ => {}
}
let non_enum = NonExhaustiveEnum::Unit;
// Ok: without the attribute
match non_enum {
NonExhaustiveEnum::Unit => {}
NonExhaustiveEnum::Tuple(_) => {}
_ => {}
}
match non_enum {
NonExhaustiveEnum::Unit => {}
NonExhaustiveEnum::Tuple(_) => {}
#[deny(non_exhaustive_omitted_patterns)]
_ => {}
}
//~^^ some variants are not matched explicitly
match non_enum {
NonExhaustiveEnum::Unit | NonExhaustiveEnum::Struct { .. } => {}
#[deny(non_exhaustive_omitted_patterns)]
_ => {}
}
//~^^ some variants are not matched explicitly
let x = 5;
match non_enum {
NonExhaustiveEnum::Unit if x > 10 => {}
NonExhaustiveEnum::Tuple(_) => {}
NonExhaustiveEnum::Struct { .. } => {}
#[deny(non_exhaustive_omitted_patterns)]
_ => {}
}
//~^^ some variants are not matched explicitly
// Ok: all covered and not `unreachable-patterns`
#[deny(unreachable_patterns)]
match non_enum {
NonExhaustiveEnum::Unit => {}
NonExhaustiveEnum::Tuple(_) => {}
NonExhaustiveEnum::Struct { .. } => {}
#[deny(non_exhaustive_omitted_patterns)]
_ => {}
}
#[deny(non_exhaustive_omitted_patterns)]
match NestedNonExhaustive::B {
NestedNonExhaustive::A(NonExhaustiveEnum::Unit) => {}
NestedNonExhaustive::A(_) => {}
NestedNonExhaustive::B => {}
_ => {}
}
//~^^ some variants are not matched explicitly
//~^^^^^ some variants are not matched explicitly
#[warn(non_exhaustive_omitted_patterns)]
match VariantNonExhaustive::Baz(1, 2) {
VariantNonExhaustive::Baz(_, _) => {}
VariantNonExhaustive::Bar { x, .. } => {}
}
//~^^ some fields are not explicitly listed
#[warn(non_exhaustive_omitted_patterns)]
let FunctionalRecord { first_field, second_field, .. } = FunctionalRecord::default();
//~^ some fields are not explicitly listed
// Ok: this is local
#[warn(non_exhaustive_omitted_patterns)]
let Foo { a, b, .. } = Foo::default();
#[warn(non_exhaustive_omitted_patterns)]
let NestedStruct { bar: NormalStruct { first_field, .. }, .. } = NestedStruct::default();
//~^ some fields are not explicitly listed
//~^^ some fields are not explicitly listed
// Ok: this tests https://github.com/rust-lang/rust/issues/89382
#[warn(non_exhaustive_omitted_patterns)]
let MixedVisFields { a, b, .. } = MixedVisFields::default();
// Ok: because this only has 1 variant
#[deny(non_exhaustive_omitted_patterns)]
match NonExhaustiveSingleVariant::A(true) {
NonExhaustiveSingleVariant::A(true) => {}
_ => {}
}
#[deny(non_exhaustive_omitted_patterns)]
match NonExhaustiveSingleVariant::A(true) {
_ => {}
}
//~^^ some variants are not matched explicitly
// Ok: we don't lint on `if let` expressions
#[deny(non_exhaustive_omitted_patterns)]
if let NonExhaustiveEnum::Tuple(_) = non_enum {}
match UnstableEnum::Stable {
UnstableEnum::Stable => {}
UnstableEnum::Stable2 => {}
#[deny(non_exhaustive_omitted_patterns)]
_ => {}
}
//~^^ some variants are not matched explicitly
// Ok: the feature is on and all variants are matched
#[deny(non_exhaustive_omitted_patterns)]
match UnstableEnum::Stable {
UnstableEnum::Stable => {}
UnstableEnum::Stable2 => {}
UnstableEnum::Unstable => {}
_ => {}
}
// Ok: the feature is on and both variants are matched
#[deny(non_exhaustive_omitted_patterns)]
match OnlyUnstableEnum::Unstable {
OnlyUnstableEnum::Unstable => {}
OnlyUnstableEnum::Unstable2 => {}
_ => {}
}
#[deny(non_exhaustive_omitted_patterns)]
match OnlyUnstableEnum::Unstable {
OnlyUnstableEnum::Unstable => {}
_ => {}
}
//~^^ some variants are not matched explicitly
#[warn(non_exhaustive_omitted_patterns)]
let OnlyUnstableStruct { unstable, .. } = OnlyUnstableStruct::new();
//~^ some fields are not explicitly listed
// OK: both unstable fields are matched with feature on
#[warn(non_exhaustive_omitted_patterns)]
let OnlyUnstableStruct { unstable, unstable2, .. } = OnlyUnstableStruct::new();
#[warn(non_exhaustive_omitted_patterns)]
let UnstableStruct { stable, stable2, .. } = UnstableStruct::default();
//~^ some fields are not explicitly listed
// OK: both unstable and stable fields are matched with feature on
#[warn(non_exhaustive_omitted_patterns)]
let UnstableStruct { stable, stable2, unstable, .. } = UnstableStruct::default();
// Ok: local bindings are allowed
#[deny(non_exhaustive_omitted_patterns)]
let local = NonExhaustiveEnum::Unit;
// Ok: missing patterns will be blocked by the pattern being refutable
#[deny(non_exhaustive_omitted_patterns)]
let local_refutable @ NonExhaustiveEnum::Unit = NonExhaustiveEnum::Unit;
//~^ refutable pattern in local binding
// Check that matching on a reference results in a correctly spanned diagnostic
#[deny(non_exhaustive_omitted_patterns)]
match &non_enum {
NonExhaustiveEnum::Unit => {}
NonExhaustiveEnum::Tuple(_) => {}
_ => {}
}
//~^^ some variants are not matched explicitly
}
#[deny(non_exhaustive_omitted_patterns)]
// Ok: Pattern in a param is always wildcard
pub fn takes_non_exhaustive(_: NonExhaustiveEnum) {
let _closure = |_: NonExhaustiveEnum| {};
}
|
