// Copyright 2017 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. // ignore-pretty pretty-printing is unhygienic #![feature(decl_macro)] macro m($T:ident, $f:ident) { pub trait $T { fn f(&self) -> u32 { 0 } fn $f(&self) -> i32 { 0 } } impl $T for () {} let _: u32 = ().f(); let _: i32 = ().$f(); } fn main() { m!(T, f); let _: i32 = ().f(); }