//! RA Proc Macro Server //! //! This library is able to call compiled Rust custom derive dynamic libraries on arbitrary code. //! The general idea here is based on https://github.com/fedochet/rust-proc-macro-expander. //! //! But we adapt it to better fit RA needs: //! //! * We use `ra_tt` for proc-macro `TokenStream` server, it is easier to manipulate and interact with //! RA than `proc-macro2` token stream. //! * By **copying** the whole rustc `lib_proc_macro` code, we are able to build this with `stable` //! rustc rather than `unstable`. (Although in gerenal ABI compatibility is still an issue) #[allow(dead_code)] #[doc(hidden)] mod proc_macro; #[doc(hidden)] mod rustc_server; mod dylib; use proc_macro::bridge::client::TokenStream; use ra_proc_macro::{ExpansionResult, ExpansionTask, ListMacrosResult, ListMacrosTask}; use std::path::Path; pub(crate) fn expand_task(task: &ExpansionTask) -> Result<ExpansionResult, String> { let expander = create_expander(&task.lib); match expander.expand(&task.macro_name, &task.macro_body, task.attributes.as_ref()) { Ok(expansion) => Ok(ExpansionResult { expansion }), Err(msg) => { Err(format!("Cannot perform expansion for {}: error {:?}", &task.macro_name, msg)) } } } pub(crate) fn list_macros(task: &ListMacrosTask) -> ListMacrosResult { let expander = create_expander(&task.lib); ListMacrosResult { macros: expander.list_macros() } } fn create_expander(lib: &Path) -> dylib::Expander { dylib::Expander::new(lib) .unwrap_or_else(|err| panic!("Cannot create expander for {}: {:?}", lib.display(), err)) } pub mod cli; #[cfg(test)] mod tests;