mirror of https://github.com/rust-lang/rust
57 lines
1.3 KiB
Rust
57 lines
1.3 KiB
Rust
//@ aux-build:lifetime_bound_will_change_warning_lib.rs
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// Test that various corner cases cause an error. These are tests
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// that used to pass before we tweaked object defaults.
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#![allow(dead_code)]
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#![allow(unused_variables)]
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extern crate lifetime_bound_will_change_warning_lib as lib;
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fn just_ref(x: &dyn Fn()) {
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}
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fn ref_obj(x: &Box<dyn Fn()>) {
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// this will change to &Box<Fn()+'static>...
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// Note: no warning is issued here, because the type of `x` will change to 'static
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if false { ref_obj(x); }
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}
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fn test1<'a>(x: &'a Box<dyn Fn() + 'a>) {
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// just_ref will stay the same.
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just_ref(&**x)
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}
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fn test1cc<'a>(x: &'a Box<dyn Fn() + 'a>) {
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// same as test1, but cross-crate
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lib::just_ref(&**x)
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}
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fn test2<'a>(x: &'a Box<dyn Fn() + 'a>) {
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// but ref_obj will not, so warn.
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ref_obj(x)
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//~^ ERROR borrowed data escapes
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}
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fn test2cc<'a>(x: &'a Box<dyn Fn() + 'a>) {
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// same as test2, but cross crate
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lib::ref_obj(x)
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//~^ ERROR borrowed data escapes
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}
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fn test3<'a>(x: &'a Box<dyn Fn() + 'static>) {
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// here, we have a 'static bound, so even when ref_obj changes, no error results
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ref_obj(x)
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}
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fn test3cc<'a>(x: &'a Box<dyn Fn() + 'static>) {
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// same as test3, but cross crate
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lib::ref_obj(x)
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}
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fn main() {
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}
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