mirror of https://github.com/rust-lang/rust
31 lines
497 B
Rust
31 lines
497 B
Rust
//@ run-pass
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// Test that a custom deref with a fat pointer return type does not ICE
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use std::ops::Deref;
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pub struct Arr {
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ptr: Box<[usize]>
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}
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impl Deref for Arr {
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type Target = [usize];
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fn deref(&self) -> &[usize] {
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&*self.ptr
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}
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}
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pub fn foo(arr: &Arr) {
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assert_eq!(arr.len(), 3);
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let x: &[usize] = &**arr;
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assert_eq!(x[0], 1);
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assert_eq!(x[1], 2);
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assert_eq!(x[2], 3);
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}
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fn main() {
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let a = Arr { ptr: Box::new([1, 2, 3]) };
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foo(&a);
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}
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