mirror of https://github.com/rust-lang/rust
30 lines
969 B
Rust
30 lines
969 B
Rust
//@ revisions: full min
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#![cfg_attr(full, feature(adt_const_params))]
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#![cfg_attr(full, allow(incomplete_features))]
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struct Checked<const F: fn(usize) -> bool>;
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//~^ ERROR: using function pointers as const generic parameters
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fn not_one(val: usize) -> bool { val != 1 }
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fn not_two(val: usize) -> bool { val != 2 }
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fn generic_arg<T>(val: T) -> bool { true }
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fn generic<T>(val: usize) -> bool { val != 1 }
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fn main() {
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let _: Option<Checked<not_one>> = None;
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let _: Checked<not_one> = Checked::<not_one>;
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let _: Checked<not_one> = Checked::<not_two>;
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let _ = Checked::<generic_arg>;
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let _ = Checked::<{generic_arg::<usize>}>;
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let _ = Checked::<{generic_arg::<u32>}>; //~ ERROR: mismatched types
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let _ = Checked::<generic>; //~ ERROR: type annotations needed
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let _ = Checked::<{generic::<u16>}>;
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let _: Checked<{generic::<u16>}> = Checked::<{generic::<u16>}>;
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let _: Checked<{generic::<u32>}> = Checked::<{generic::<u16>}>;
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}
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