rust/compiler/rustc_expand/src/lib.rs

// tidy-alphabetical-start
#![allow(internal_features)]
#![feature(associated_type_defaults)]
#![feature(macro_metavar_expr)]
#![feature(proc_macro_diagnostic)]
#![feature(proc_macro_internals)]
#![feature(try_blocks)]
#![feature(yeet_expr)]
// tidy-alphabetical-end

mod build;
mod errors;
mod mbe;
mod placeholders;
mod proc_macro_server;
mod stats;

pub use mbe::macro_rules::{MacroRulesMacroExpander, compile_declarative_macro};
pub mod base;
pub mod config;
pub mod expand;
pub mod module;
pub mod proc_macro;

pub fn provide(providers: &mut rustc_middle::query::Providers) {
    providers.derive_macro_expansion = proc_macro::provide_derive_macro_expansion;
}