src/test/ui/proc-macro/non-root.rs


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// Copyright 2018 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.

// force-host
// no-prefer-dynamic

#![crate_type = "proc-macro"]

extern crate proc_macro;
use proc_macro::*;

fn foo(arg: TokenStream) -> TokenStream {
    #[proc_macro]
    pub fn foo(arg: TokenStream) -> TokenStream { arg }
    //~^ ERROR functions tagged with `#[proc_macro]` must currently reside in the root of the crate

    arg
}