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https://github.com/rust-lang/rust
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19 lines
449 B
Rust
19 lines
449 B
Rust
//@ run-pass
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use std::cell::Cell;
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const NONE_CELL_STRING: Option<Cell<String>> = None;
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struct Foo<T>(#[allow(dead_code)] T);
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impl<T> Foo<T> {
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const FOO: Option<Box<T>> = None;
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}
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fn main() {
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let _: &'static u32 = &42;
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let _: &'static Option<u32> = &None;
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// We should be able to peek at consts and see they're None.
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let _: &'static Option<Cell<String>> = &NONE_CELL_STRING;
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let _: &'static Option<Box<()>> = &Foo::FOO;
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}
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