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// aux-build:uninhabited.rs
// build-pass (FIXME(62277): could be check-pass?)
#![deny(unreachable_patterns)]
#![feature(exhaustive_patterns)]
extern crate uninhabited;
use uninhabited::{
PartiallyInhabitedVariants,
UninhabitedEnum,
UninhabitedStruct,
UninhabitedTupleStruct,
UninhabitedVariants,
};
fn uninhabited_enum() -> Option<UninhabitedEnum> {
None
}
fn uninhabited_variant() -> Option<UninhabitedVariants> {
None
}
fn partially_inhabited_variant() -> PartiallyInhabitedVariants {
PartiallyInhabitedVariants::Tuple(3)
}
fn uninhabited_struct() -> Option<UninhabitedStruct> {
None
}
fn uninhabited_tuple_struct() -> Option<UninhabitedTupleStruct> {
None
}
// This test checks that non-exhaustive types that would normally be considered uninhabited within
// the defining crate are not considered uninhabited from extern crates.
fn main() {
match uninhabited_enum() {
Some(_x) => (), // This line would normally error.
None => (),
}
match uninhabited_variant() {
Some(_x) => (), // This line would normally error.
None => (),
}
// This line would normally error.
while let PartiallyInhabitedVariants::Struct { x, .. } = partially_inhabited_variant() {
}
while let Some(_x) = uninhabited_struct() { // This line would normally error.
}
while let Some(_x) = uninhabited_tuple_struct() { // This line would normally error.
}
}
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