src/test/ui/macros/macro-parameter-span.rs

// Copyright 2015 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 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

macro_rules! foo {
    ($id: ident) => {
        $id
    }
}

// Testing that the error span points to the parameter 'x' in the callsite,
// not to the macro variable '$id'
fn main() {
    foo!(
        x //~ ERROR cannot find value `x` in this scope
        );
}