// Copyright 2016 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. macro_rules! macro_panic { ($not_a_function:expr, $some_argument:ident) => { $not_a_function($some_argument) //~^ ERROR expected function, found `{integer}` } } fn main() { let mut value_a = 0; let mut value_b = 0; macro_panic!(value_a, value_b); //~^ in this expansion of macro_panic! }