mirror of https://github.com/rust-lang/rust.git
43 lines
2.2 KiB
Rust
43 lines
2.2 KiB
Rust
//@ compile-flags: -Znext-solver
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#![cfg_attr(any(yyy, yyn, yny, ynn), feature(const_trait_impl))]
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//@ revisions: yyy yyn yny ynn nyy nyn nny nnn
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//@[yyy] check-pass
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/// yyy: feature enabled, Foo is const, Bar is const
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/// yyn: feature enabled, Foo is const, Bar is not const
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/// yny: feature enabled, Foo is not const, Bar is const
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/// ynn: feature enabled, Foo is not const, Bar is not const
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/// nyy: feature not enabled, Foo is const, Bar is const
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/// nyn: feature not enabled, Foo is const, Bar is not const
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/// nny: feature not enabled, Foo is not const, Bar is const
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/// nnn: feature not enabled, Foo is not const, Bar is not const
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#[cfg_attr(any(yyy, yyn, nyy, nyn), const_trait)]
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//[nyy,nyn]~^ ERROR: `const_trait` is a temporary placeholder for marking a trait that is suitable for `const` `impls` and all default bodies as `const`, which may be removed or renamed in the future
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trait Foo {
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fn a(&self);
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}
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#[cfg_attr(any(yyy, yny, nyy, nyn), const_trait)]
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//[nyy,nyn]~^ ERROR: `const_trait` is a temporary placeholder for marking a trait that is suitable for `const` `impls` and all default bodies as `const`, which may be removed or renamed in the future
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trait Bar: ~const Foo {}
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//[yny,ynn,nny,nnn]~^ ERROR: `~const` can only be applied to `#[const_trait]`
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//[yny,ynn,nny,nnn]~| ERROR: `~const` can only be applied to `#[const_trait]`
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//[yny,ynn,nny,nnn]~| ERROR: `~const` can only be applied to `#[const_trait]`
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//[yny]~^^^^ ERROR: `~const` can only be applied to `#[const_trait]`
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//[yny]~| ERROR: `~const` can only be applied to `#[const_trait]`
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//[yyn,ynn,nny,nnn]~^^^^^^ ERROR: `~const` is not allowed here
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//[nyy,nyn,nny,nnn]~^^^^^^^ ERROR: const trait impls are experimental
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const fn foo<T: ~const Bar>(x: &T) {
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//[yyn,ynn,nny,nnn]~^ ERROR: `~const` can only be applied to `#[const_trait]`
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//[yyn,ynn,nny,nnn]~| ERROR: `~const` can only be applied to `#[const_trait]`
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//[nyy,nyn,nny,nnn]~^^^ ERROR: const trait impls are experimental
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x.a();
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//[yyn]~^ ERROR: the trait bound `T: ~const Foo` is not satisfied
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//[ynn,yny,nny,nnn]~^^ ERROR: cannot call non-const method `<T as Foo>::a` in constant functions
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//[nyy,nyn]~^^^ ERROR: cannot call conditionally-const method `<T as Foo>::a` in constant functions
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}
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fn main() {}
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