37 lines
1.0 KiB
Rust
37 lines
1.0 KiB
Rust
// revisions: full min
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#![cfg_attr(full, feature(adt_const_params))]
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#![cfg_attr(full, allow(incomplete_features))]
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struct Test(*const usize);
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type PassArg = ();
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unsafe extern "C" fn pass(args: PassArg) {
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println!("Hello, world!");
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}
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impl Test {
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pub fn call_me<Args: Sized, const IDX: usize, const FN: unsafe extern "C" fn(Args)>(&self) {
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//~^ ERROR: using function pointers as const generic parameters is forbidden
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//~| ERROR: the type of const parameters must not depend on other generic parameters
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self.0 = Self::trampiline::<Args, IDX, FN> as _
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}
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unsafe extern "C" fn trampiline<
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Args: Sized,
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const IDX: usize,
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const FN: unsafe extern "C" fn(Args),
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//~^ ERROR: using function pointers as const generic parameters is forbidden
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//~| ERROR: the type of const parameters must not depend on other generic parameters
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>(
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args: Args,
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) {
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FN(args)
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}
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}
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fn main() {
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let x = Test();
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x.call_me::<PassArg, 30, pass>()
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}
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