tests/rustdoc/const-fn-effects.rs

#![crate_name = "foo"]

//@ has foo/fn.bar.html
//@ has - '//pre[@class="rust item-decl"]' 'pub const fn bar() -> '
/// foo
pub const fn bar() -> usize {
    2
}

//@ has foo/struct.Foo.html
//@ has - '//*[@class="method"]' 'const fn new()'
pub struct Foo(usize);

impl Foo {
    pub const fn new() -> Foo {
        Foo(0)
    }
}