mirror of https://github.com/rust-lang/rust
52 lines
936 B
Rust
52 lines
936 B
Rust
//@ build-pass
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// The ICE didn't happen with `cargo check` but `cargo build`.
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use std::marker::PhantomData;
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trait Owned<'a> {
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type Reader;
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}
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impl<'a> Owned<'a> for () {
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type Reader = ();
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}
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trait Handler {
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fn handle(&self);
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}
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struct CtxHandlerWithoutState<M, F> {
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message_type: PhantomData<M>,
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_function: F,
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}
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impl<M, F> CtxHandlerWithoutState<M, F> {
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pub fn new(_function: F) -> Self {
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Self {
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message_type: PhantomData,
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_function,
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}
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}
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}
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impl<'a, M, F> Handler for CtxHandlerWithoutState<M, F>
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where
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F: Fn(<M as Owned<'a>>::Reader),
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M: Owned<'a>,
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{
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fn handle(&self) {}
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}
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fn e_to_i<M: for<'a> Owned<'a>>(_: <M as Owned<'_>>::Reader) {}
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fn send_external_to_internal<M>()
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where
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M: for<'a> Owned<'a>,
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{
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let _: Box<dyn Handler> = Box::new(CtxHandlerWithoutState::<M, _>::new(e_to_i::<M>));
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}
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fn main() {
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send_external_to_internal::<()>()
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}
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