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Tyler Mandry
8709ac81d3
Update const-fn doc in unstable-book Fix #79691 I couldn't find suitable examples. It seems that `const_fn` feature-gate used only following place. https://github.com/rust-lang/rust/blob/810324d1f31eb8d75e8f0044df720652986ef133/compiler/rustc_ast_passes/src/feature_gate.rs#L560-L562 And example like following emits [E0379](https://doc.rust-lang.org/error-index.html#E0379). ```rust #![feature(const_fn)] trait Foo { const fn bar() -> Self; } ``` Any other suitable example exists, please let me know.