alexcrichton · March 1, 2019 19:53
diff --git a/Cargo.lock b/Cargo.lock
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 [[package]]
 name = "foo"
 version = "0.1.0"

diff --git a/Cargo.toml b/Cargo.toml
 [package]
 name = "foo"
 version = "0.1.0"
 authors = ["Alex Crichton <[email protected]>"]
 edition = "2018"

 [lib]
 proc-macro = true
 path = 'lib.rs'

 [[bin]]
 path = 'main.rs'
 name = 'foo'
diff --git a/lib.rs b/lib.rs
 extern crate proc_macro;

 use proc_macro::TokenStream;

 #[proc_macro_attribute]
 pub fn foo(attr: TokenStream, input: TokenStream) -> TokenStream {
    println!("attr: {}", attr);
    println!("input: {}", input);
    input
 }
diff --git a/main.rs b/main.rs
 #[foo::foo]
 extern "C" {
    fn foo(x: i32, ...);
 }

 fn main() {
    println!("Hello, world!");
 }
	# This file is automatically @generated by Cargo.
	# It is not intended for manual editing.
	[[package]]
	name = "foo"
	version = "0.1.0"
	[package]
	name = "foo"
	version = "0.1.0"
	authors = ["Alex Crichton <[email protected]>"]
	edition = "2018"

	[lib]
	proc-macro = true
	path = 'lib.rs'

	[[bin]]
	path = 'main.rs'
	name = 'foo'
	extern crate proc_macro;

	use proc_macro::TokenStream;

	#[proc_macro_attribute]
	pub fn foo(attr: TokenStream, input: TokenStream) -> TokenStream {
	println!("attr: {}", attr);
	println!("input: {}", input);
	input
	}