36 lines
1.0 KiB
Rust
36 lines
1.0 KiB
Rust
|
// 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.
|
||
|
|
|
||
|
|
// no-prefer-dynamic
|
||
|
|
|
||
|
|
#![crate_type = "proc-macro"]
|
||
|
|
|
||
|
|
extern crate proc_macro;
|
||
|
|
|
||
|
|
use proc_macro::*;
|
||
|
|
|
||
|
|
#[proc_macro]
|
||
|
|
pub fn lifetimes_bang(input: TokenStream) -> TokenStream {
|
||
|
|
// Roundtrip through token trees
|
||
|
|
input.into_iter().collect()
|
||
|
|
}
|
||
|
|
|
||
|
|
#[proc_macro_attribute]
|
||
|
|
pub fn lifetimes_attr(_: TokenStream, input: TokenStream) -> TokenStream {
|
||
|
|
// Roundtrip through AST
|
||
|
|
input
|
||
|
|
}
|
||
|
|
|
||
|
|
#[proc_macro_derive(Lifetimes)]
|
||
|
|
pub fn lifetimes_derive(input: TokenStream) -> TokenStream {
|
||
|
|
// Roundtrip through a string
|
||
|
|
format!("mod m {{ {} }}", input).parse().unwrap()
|
||
|
|
}
|