// 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. // Be smart about span of parenthesized expression in macro. macro_rules! paren { ($e:expr) => (($e)) // ^^^^ do not highlight here } mod m { pub struct S { x: i32 } pub fn make() -> S { S { x: 0 } } } fn main() { let s = m::make(); paren!(s.x); //~ ERROR field `x` of struct `m::S` is private // ^^^ highlight here }