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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.
// aux-build:parent-source-spans.rs
#![feature(decl_macro, proc_macro_hygiene)]
extern crate parent_source_spans;
use parent_source_spans::parent_source_spans;
macro one($a:expr, $b:expr) {
two!($a, $b);
//~^ ERROR first parent: "hello"
//~| ERROR second parent: "world"
}
macro two($a:expr, $b:expr) {
three!($a, $b);
//~^ ERROR first final: "hello"
//~| ERROR second final: "world"
//~| ERROR first final: "yay"
//~| ERROR second final: "rust"
}
// forwarding tokens directly doesn't create a new source chain
macro three($($tokens:tt)*) {
four!($($tokens)*);
}
macro four($($tokens:tt)*) {
parent_source_spans!($($tokens)*);
}
fn main() {
one!("hello", "world");
//~^ ERROR first grandparent: "hello"
//~| ERROR second grandparent: "world"
//~| ERROR first source: "hello"
//~| ERROR second source: "world"
two!("yay", "rust");
//~^ ERROR first parent: "yay"
//~| ERROR second parent: "rust"
//~| ERROR first source: "yay"
//~| ERROR second source: "rust"
three!("hip", "hop");
//~^ ERROR first final: "hip"
//~| ERROR second final: "hop"
//~| ERROR first source: "hip"
//~| ERROR second source: "hop"
}
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