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9f03cfc207
This was previously needed because the indirection used to hide some unexplained lifetime errors, which it turned out were related to the `min_choice` algorithm. Removing the indirection also solves a couple of cycle errors, large moves and makes async blocks support the `#[track_caller]` annotation.
56 lines
2.1 KiB
Rust
56 lines
2.1 KiB
Rust
// Ensures that all `fn` forms can have all the function qualifiers syntactically.
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// edition:2018
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#![feature(const_extern_fn)]
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fn main() {
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async fn ff1() {} // OK.
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unsafe fn ff2() {} // OK.
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const fn ff3() {} // OK.
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extern "C" fn ff4() {} // OK.
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const async unsafe extern "C" fn ff5() {}
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//~^ ERROR functions cannot be both `const` and `async`
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trait X {
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async fn ft1(); //~ ERROR functions in traits cannot be declared `async`
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unsafe fn ft2(); // OK.
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const fn ft3(); //~ ERROR functions in traits cannot be declared const
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extern "C" fn ft4(); // OK.
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const async unsafe extern "C" fn ft5();
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//~^ ERROR functions in traits cannot be declared `async`
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//~| ERROR functions in traits cannot be declared const
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//~| ERROR functions cannot be both `const` and `async`
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}
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struct Y;
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impl X for Y {
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async fn ft1() {} //~ ERROR functions in traits cannot be declared `async`
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unsafe fn ft2() {} // OK.
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const fn ft3() {} //~ ERROR functions in traits cannot be declared const
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extern "C" fn ft4() {}
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const async unsafe extern "C" fn ft5() {}
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//~^ ERROR functions in traits cannot be declared `async`
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//~| ERROR functions in traits cannot be declared const
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//~| ERROR functions cannot be both `const` and `async`
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}
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impl Y {
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async fn fi1() {} // OK.
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unsafe fn fi2() {} // OK.
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const fn fi3() {} // OK.
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extern "C" fn fi4() {} // OK.
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const async unsafe extern "C" fn fi5() {}
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//~^ ERROR functions cannot be both `const` and `async`
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}
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extern "C" {
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async fn fe1(); //~ ERROR functions in `extern` blocks cannot have qualifiers
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unsafe fn fe2(); //~ ERROR functions in `extern` blocks cannot have qualifiers
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const fn fe3(); //~ ERROR functions in `extern` blocks cannot have qualifiers
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extern "C" fn fe4(); //~ ERROR functions in `extern` blocks cannot have qualifiers
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const async unsafe extern "C" fn fe5(); //~ ERROR functions in `extern` blocks
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//~^ ERROR functions cannot be both `const` and `async`
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}
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}
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