46f427bee9
Fix treatment of lifetimes defined in nested types during detection of late bound regions in signatures. Do not replace substs with inference variables when "cannot specify lifetime arguments explicitly..." is reported as a lint.
97 lines
3.7 KiB
Rust
97 lines
3.7 KiB
Rust
// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![allow(unused)]
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struct S;
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impl S {
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fn late<'a, 'b>(self, _: &'a u8, _: &'b u8) {}
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fn late_implicit(self, _: &u8, _: &u8) {}
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fn late_early<'a, 'b>(self, _: &'a u8) -> &'b u8 { loop {} }
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fn late_implicit_early<'b>(self, _: &u8) -> &'b u8 { loop {} }
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// 'late lifetimes here belong to nested types not to the tested functions.
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fn early_tricky_explicit<'a>(_: for<'late> fn(&'late u8),
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_: Box<for<'late> Fn(&'late u8)>)
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-> &'a u8 { loop {} }
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fn early_tricky_implicit<'a>(_: fn(&u8),
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_: Box<Fn(&u8)>)
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-> &'a u8 { loop {} }
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}
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fn method_call() {
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S.late(&0, &0); // OK
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S.late::<'static>(&0, &0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late::<'static, 'static>(&0, &0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late::<'static, 'static, 'static>(&0, &0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late_early(&0); // OK
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S.late_early::<'static>(&0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late_early::<'static, 'static>(&0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late_early::<'static, 'static, 'static>(&0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late_implicit(&0, &0); // OK
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S.late_implicit::<'static>(&0, &0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late_implicit::<'static, 'static>(&0, &0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late_implicit::<'static, 'static, 'static>(&0, &0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late_implicit_early(&0); // OK
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S.late_implicit_early::<'static>(&0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late_implicit_early::<'static, 'static>(&0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S.late_implicit_early::<'static, 'static, 'static>(&0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S::early_tricky_explicit::<'static>(loop {}, loop {}); // OK
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S::early_tricky_implicit::<'static>(loop {}, loop {}); // OK
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}
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fn ufcs() {
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S::late_early::<'static>(S, &0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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S::late_implicit_early::<'static>(S, &0);
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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}
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fn lint_not_inference_error() {
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fn f<'early, 'late, T: 'early>() {}
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// Make sure `u8` is substituted and not replaced with an inference variable
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f::<'static, u8>;
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//~^ ERROR cannot specify lifetime arguments explicitly
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//~| WARN this was previously accepted
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}
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fn main() {}
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