File: const-fn-not-in-trait.rs

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rustc 1.87.0%2Bdfsg1-1
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// Test that const fn is illegal in a trait declaration, whether or
// not a default is provided, and even with the feature gate.

trait Foo {
    const fn f() -> u32;
    //~^ ERROR functions in traits cannot be declared const
    const fn g() -> u32 {
        //~^ ERROR functions in traits cannot be declared const
        0
    }
}

fn main() {}