rust/src/test/ui/invalid/invalid-rustc_legacy_const_generics-arguments.rs

#![feature(rustc_attrs)]

#[rustc_legacy_const_generics(0)] //~ ERROR index exceeds number of arguments
fn foo1() {}

#[rustc_legacy_const_generics(1)] //~ ERROR index exceeds number of arguments
fn foo2(_: u8) {}

#[rustc_legacy_const_generics(2)] //~ ERROR index exceeds number of arguments
fn foo3<const X: usize>(_: u8) {}

#[rustc_legacy_const_generics(a)] //~ ERROR arguments should be non-negative integers
fn foo4() {}

#[rustc_legacy_const_generics(1, a, 2, b)] //~ ERROR arguments should be non-negative integers
fn foo5(_: u8, _: u8, _: u8) {}

#[rustc_legacy_const_generics(0)] //~ ERROR attribute should be applied to a function
struct S;

#[rustc_legacy_const_generics(0usize)] //~ ERROR suffixed literals are not allowed in attributes
fn foo6(_: u8) {}

extern {
    #[rustc_legacy_const_generics(1)] //~ ERROR index exceeds number of arguments
    fn foo7(_: u8);
}

#[rustc_legacy_const_generics(0)] //~ ERROR #[rustc_legacy_const_generics] functions must only have
fn foo8<X>() {}

#[rustc_legacy_const_generics] //~ ERROR malformed `rustc_legacy_const_generics` attribute
fn bar1() {}

#[rustc_legacy_const_generics = 1] //~ ERROR malformed `rustc_legacy_const_generics` attribute
fn bar2() {}

fn main() {}