mirror of https://github.com/rust-lang/rust
76 lines
1.9 KiB
Rust
76 lines
1.9 KiB
Rust
// Test the simplest of outlives suggestions.
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fn foo1<'a, 'b>(x: &'a usize) -> &'b usize {
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x //~ERROR lifetime may not live long enough
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}
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fn foo2<'a>(x: &'a usize) -> &'static usize {
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x //~ERROR lifetime may not live long enough
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}
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fn foo3<'a, 'b>(x: &'a usize, y: &'b usize) -> (&'b usize, &'a usize) {
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(x, y) //~ERROR lifetime may not live long enough
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//~^ERROR lifetime may not live long enough
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}
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fn foo4<'a, 'b, 'c>(x: &'a usize) -> (&'b usize, &'c usize) {
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// FIXME: ideally, we suggest 'a: 'b + 'c, but as of today (may 04, 2019), the null error
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// reporting stops after the first error in a MIR def so as not to produce too many errors, so
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// currently we only report 'a: 'b. The user would then re-run and get another error.
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(x, x) //~ERROR lifetime may not live long enough
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}
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struct Foo<'a> {
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x: &'a usize,
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}
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impl Foo<'static> {
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pub fn foo<'a>(x: &'a usize) -> Self {
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Foo { x } //~ERROR lifetime may not live long enough
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}
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}
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struct Bar<'a> {
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x: &'a usize,
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}
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impl<'a> Bar<'a> {
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pub fn get<'b>(&self) -> &'b usize {
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self.x //~ERROR lifetime may not live long enough
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}
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}
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// source: https://stackoverflow.com/questions/41417057/why-do-i-get-a-lifetime-error-when-i-use-a-mutable-reference-in-a-struct-instead
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struct Baz<'a> {
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x: &'a mut i32,
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}
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impl<'a> Baz<'a> {
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fn get<'b>(&'b self) -> &'a i32 {
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self.x //~ERROR lifetime may not live long enough
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}
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}
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// source: https://stackoverflow.com/questions/41204134/rust-lifetime-error
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struct Bar2<'a> {
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bar: &'a str,
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}
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impl<'a> Bar2<'a> {
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fn new(foo: &'a Foo2<'a>) -> Bar2<'a> {
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Bar2 { bar: foo.raw }
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}
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}
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pub struct Foo2<'a> {
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raw: &'a str,
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cell: std::cell::Cell<&'a str>,
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}
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impl<'a> Foo2<'a> {
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// should not produce outlives suggestions to name 'self
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fn get_bar(&self) -> Bar2 {
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Bar2::new(&self) //~ERROR lifetime may not live long enough
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}
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}
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fn main() {}
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