fn add(x: i32 )

fn add(x: i32,, ) {}

fn add(x: i32, y: i32) -> i32 {
    +
}

fn add add() {}

unsafe const fn b() -> () { () }

fn foo(a: &, b: i32) {}
fn bar(, b: i32) {}
fn baz(a: i32 b: i32) {}
fn quux(a: i32,, b: i32) {}

fn spam(self a: i32) {}
fn eggs(self,, a: i32) {}

fn foo( {}
fn foo( ;

fn bar(a: i32 {}
fn bar(a: i32, {}
fn bar(, {}

fn foo(...,,) {}

fn foo() ->
fn bar() {}
