106 lines
3.7 KiB
Rust
106 lines
3.7 KiB
Rust
//! Proc macro ABI.
|
|
|
|
#[allow(dead_code)]
|
|
#[doc(hidden)]
|
|
mod proc_macro;
|
|
|
|
#[allow(dead_code)]
|
|
#[doc(hidden)]
|
|
mod ra_server;
|
|
|
|
use libloading::Library;
|
|
use proc_macro_api::ProcMacroKind;
|
|
|
|
use super::PanicMessage;
|
|
|
|
pub use ra_server::TokenStream;
|
|
|
|
pub(crate) struct Abi {
|
|
exported_macros: Vec<proc_macro::bridge::client::ProcMacro>,
|
|
}
|
|
|
|
impl From<proc_macro::bridge::PanicMessage> for PanicMessage {
|
|
fn from(p: proc_macro::bridge::PanicMessage) -> Self {
|
|
Self { message: p.as_str().map(|s| s.to_string()) }
|
|
}
|
|
}
|
|
|
|
impl Abi {
|
|
pub unsafe fn from_lib(lib: &Library, symbol_name: String) -> Result<Abi, libloading::Error> {
|
|
let macros: libloading::Symbol<'_, &&[proc_macro::bridge::client::ProcMacro]> =
|
|
lib.get(symbol_name.as_bytes())?;
|
|
Ok(Self { exported_macros: macros.to_vec() })
|
|
}
|
|
|
|
pub fn expand(
|
|
&self,
|
|
macro_name: &str,
|
|
macro_body: &tt::Subtree,
|
|
attributes: Option<&tt::Subtree>,
|
|
) -> Result<tt::Subtree, PanicMessage> {
|
|
let parsed_body = TokenStream::with_subtree(macro_body.clone());
|
|
|
|
let parsed_attributes =
|
|
attributes.map_or(TokenStream::new(), |attr| TokenStream::with_subtree(attr.clone()));
|
|
|
|
for proc_macro in &self.exported_macros {
|
|
match proc_macro {
|
|
proc_macro::bridge::client::ProcMacro::CustomDerive {
|
|
trait_name, client, ..
|
|
} if *trait_name == macro_name => {
|
|
let res = client.run(
|
|
&proc_macro::bridge::server::SameThread,
|
|
ra_server::RustAnalyzer::default(),
|
|
parsed_body,
|
|
true,
|
|
);
|
|
return res.map(|it| it.into_subtree()).map_err(PanicMessage::from);
|
|
}
|
|
proc_macro::bridge::client::ProcMacro::Bang { name, client }
|
|
if *name == macro_name =>
|
|
{
|
|
let res = client.run(
|
|
&proc_macro::bridge::server::SameThread,
|
|
ra_server::RustAnalyzer::default(),
|
|
parsed_body,
|
|
true,
|
|
);
|
|
return res.map(|it| it.into_subtree()).map_err(PanicMessage::from);
|
|
}
|
|
proc_macro::bridge::client::ProcMacro::Attr { name, client }
|
|
if *name == macro_name =>
|
|
{
|
|
let res = client.run(
|
|
&proc_macro::bridge::server::SameThread,
|
|
ra_server::RustAnalyzer::default(),
|
|
parsed_attributes,
|
|
parsed_body,
|
|
true,
|
|
);
|
|
return res.map(|it| it.into_subtree()).map_err(PanicMessage::from);
|
|
}
|
|
_ => continue,
|
|
}
|
|
}
|
|
|
|
Err(proc_macro::bridge::PanicMessage::String("Nothing to expand".to_string()).into())
|
|
}
|
|
|
|
pub fn list_macros(&self) -> Vec<(String, ProcMacroKind)> {
|
|
self.exported_macros
|
|
.iter()
|
|
.map(|proc_macro| match proc_macro {
|
|
proc_macro::bridge::client::ProcMacro::CustomDerive { trait_name, .. } => {
|
|
(trait_name.to_string(), ProcMacroKind::CustomDerive)
|
|
}
|
|
proc_macro::bridge::client::ProcMacro::Bang { name, .. } => {
|
|
(name.to_string(), ProcMacroKind::FuncLike)
|
|
}
|
|
proc_macro::bridge::client::ProcMacro::Attr { name, .. } => {
|
|
(name.to_string(), ProcMacroKind::Attr)
|
|
}
|
|
})
|
|
.collect()
|
|
}
|
|
}
|