37 lines
739 B
Rust
37 lines
739 B
Rust
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#![feature(const_eval_select)]
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use std::intrinsics::const_eval_select;
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const fn not_fn_items() {
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const_eval_select((), |()| {}, |()| {});
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//~^ ERROR expected a `FnOnce<((),)>` closure
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const_eval_select((), 42, 0xDEADBEEF);
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//~^ ERROR expected a `FnOnce<((),)>` closure
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}
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const fn foo((n,): (i32,)) -> i32 {
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n
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}
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fn bar((n,): (i32,)) -> bool {
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assert_eq!(n, 0, "{} must be equal to {}", n, 0);
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n == 0
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}
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fn baz((n,): (bool,)) -> i32 {
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assert!(n, "{} must be true", n);
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n as i32
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}
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const fn return_ty_mismatch() {
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const_eval_select((1,), foo, bar);
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//~^ ERROR type mismatch
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}
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const fn args_ty_mismatch() {
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const_eval_select((true,), foo, baz);
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//~^ ERROR type mismatch
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}
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fn main() {}
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