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/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under both the MIT license found in the
* LICENSE-MIT file in the root directory of this source tree and the Apache
* License, Version 2.0 found in the LICENSE-APACHE file in the root directory
* of this source tree.
*/
#![deny(warnings, clippy::all, rustdoc::broken_intra_doc_links)]
// See https://github.com/rust-lang/rust/pull/60562
// #![deny(missing_docs)]
//! This crate offers a workaround for [issue](https://github.com/rust-lang/rfcs/issues/752).
//! The gist of it is that `include!` proc macro will include the content of
//! lib.rs file stored inside OUT_DIR, presumably generated by cargo's build
//! script.
//!
//! # Example
//!
//! ```
//! ::codegen_includer_proc_macro::include!();
//! hello_world(); // This was included from $OUT_DIR/lib.rs
//! ```
extern crate proc_macro;
use std::env;
use std::path::Path;
use proc_macro::TokenStream;
use quote::quote;
/// See crate's documentation
#[proc_macro]
pub fn include(_: TokenStream) -> TokenStream {
let path_to_include = Path::new(&env::var("OUT_DIR").unwrap())
.join("lib.rs")
.to_str()
.unwrap()
.to_string();
let result = quote! {
#[path = #path_to_include]
#[allow(unused_attributes)]
mod codegen_included;
pub use codegen_included::*;
};
result.into()
}