mirror of https://github.com/rust-lang/rust
41 lines
936 B
Rust
41 lines
936 B
Rust
//@ run-pass
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#![allow(warnings)]
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#[derive(Debug)]
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pub struct Bar { pub t: () }
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impl<T> Access for T {}
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pub trait Access {
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fn field(&self, _: impl Sized, _: impl Sized) {
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panic!("got into Access::field");
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}
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fn finish(&self) -> Result<(), std::fmt::Error> {
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panic!("got into Access::finish");
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}
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fn debug_struct(&self, _: impl Sized, _: impl Sized) {
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panic!("got into Access::debug_struct");
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}
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}
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impl<T> MutAccess for T {}
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pub trait MutAccess {
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fn field(&mut self, _: impl Sized, _: impl Sized) {
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panic!("got into MutAccess::field");
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}
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fn finish(&mut self) -> Result<(), std::fmt::Error> {
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panic!("got into MutAccess::finish");
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}
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fn debug_struct(&mut self, _: impl Sized, _: impl Sized) {
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panic!("got into MutAccess::debug_struct");
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}
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}
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fn main() {
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let bar = Bar { t: () };
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assert_eq!("Bar { t: () }", format!("{:?}", bar));
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}
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