File: const_generics_3.rs

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gcc-arm-none-eabi 15%3A14.2.rel1-1
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// { dg-additional-options "-w" }

const M: usize = 4;

struct Foo<T, const N: usize = 1> {
    // FIXME: This error is bogus. But having it means parsing is valid!
    value: [i32; N], // { dg-error "cannot find value .N. in this scope" }
}

fn main() {
    let foo = Foo::<i32> { value: [15] };
    let foo = Foo::<i32, 2> { value: [15, 13] };
    let foo: Foo<i32, 2> = Foo { value: [15, 13] };
    let foo: Foo<i32, 2> = Foo::<i32, 2> { value: [15, 13] };
    let foo: Foo<i32, { 1 + 1 }> = Foo { value: [15, 13] };
    let foo = Foo::<i32, { 1 + 1 }> { value: [15, 13] };
    let foo: Foo<i32, { 1 + 1 }> = Foo::<i32, { 1 + 1 }> { value: [15, 13] };
    let foo: Foo<i32, M> = Foo::<i32, 4> {
        value: [15, 13, 11, 9],
    };

    // FIXME: Add proper const typecheck errors here
    let invalid_foo: Foo<i32, { 1 + 1 }> = Foo::<i32, 3> { value: [15, 13] };
    let invalid_foo: Foo<i32, { 1 + 1 }> = Foo::<i32, M> { value: [15, 13] };
    let invalid_foo: Foo<i32> = Foo::<i32, 2> { value: [15, 13] };
}