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|
//! Driver for proc macro server
use crate::{expand_task, list_macros};
use ra_proc_macro::msg::{self, Message};
use std::io;
fn read_request() -> Result<Option<msg::Request>, io::Error> {
let stdin = io::stdin();
let mut stdin = stdin.lock();
msg::Request::read(&mut stdin)
}
fn write_response(res: Result<msg::Response, String>) -> Result<(), io::Error> {
let msg: msg::Response = match res {
Ok(res) => res,
Err(err) => msg::Response::Error(msg::ResponseError {
code: msg::ErrorCode::ExpansionError,
message: err,
}),
};
let stdout = io::stdout();
let mut stdout = stdout.lock();
msg.write(&mut stdout)
}
pub fn run() {
loop {
let req = match read_request() {
Err(err) => {
eprintln!("Read message error on ra_proc_macro_srv: {}", err.to_string());
continue;
}
Ok(None) => continue,
Ok(Some(req)) => req,
};
match req {
msg::Request::ListMacro(task) => {
if let Err(err) =
write_response(list_macros(&task).map(|it| msg::Response::ListMacro(it)))
{
eprintln!("Write message error on list macro: {}", err);
}
}
msg::Request::ExpansionMacro(task) => {
if let Err(err) =
write_response(expand_task(&task).map(|it| msg::Response::ExpansionMacro(it)))
{
eprintln!("Write message error on expansion macro: {}", err);
}
}
}
}
}
|
