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31 lines
1.0 KiB
Rust
31 lines
1.0 KiB
Rust
//@ compile-flags: -Znext-solver
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#![allow(incomplete_features)]
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#![feature(const_trait_impl, effects)]
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//@ revisions: yy yn ny nn
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//@[yy] check-pass
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#[cfg_attr(any(yy, yn), const_trait)]
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trait Foo {
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fn a(&self);
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}
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#[cfg_attr(any(yy, ny), const_trait)]
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trait Bar: ~const Foo {}
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//[ny,nn]~^ ERROR: `~const` can only be applied to `#[const_trait]`
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//[ny,nn]~| ERROR: `~const` can only be applied to `#[const_trait]`
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//[ny,nn]~| ERROR: `~const` can only be applied to `#[const_trait]`
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//[ny]~| ERROR: `~const` can only be applied to `#[const_trait]`
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//[ny]~| ERROR: `~const` can only be applied to `#[const_trait]`
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//[yn,nn]~^^^^^^ ERROR: `~const` is not allowed here
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const fn foo<T: ~const Bar>(x: &T) {
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//[yn,nn]~^ ERROR: `~const` can only be applied to `#[const_trait]`
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//[yn,nn]~| ERROR: `~const` can only be applied to `#[const_trait]`
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x.a();
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//[yn]~^ ERROR: the trait bound `T: ~const Foo` is not satisfied
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//[nn,ny]~^^ ERROR: cannot call non-const fn `<T as Foo>::a` in constant functions
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}
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fn main() {}
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