24 lines
666 B
Rust
24 lines
666 B
Rust
//@ run-pass
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#![allow(dead_code)]
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// Test that a type which is covariant with respect to its region
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// parameter is successful when used in a covariant way.
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//
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// Note: see ui/variance/variance-regions-*.rs for the tests that
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// check that the variance inference works in the first place.
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// This is covariant with respect to 'a, meaning that
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// Covariant<'foo> <: Covariant<'static> because
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// 'foo <= 'static
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//@ pretty-expanded FIXME #23616
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struct Covariant<'a> {
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f: extern "Rust" fn(&'a isize)
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}
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fn use_<'a>(c: Covariant<'a>) {
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// OK Because Covariant<'a> <: Covariant<'static> iff 'a <= 'static
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let _: Covariant<'static> = c;
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}
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pub fn main() {}
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