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#[allow(dead_code)]
#[doc(hidden)]
mod proc_macro;
#[doc(hidden)]
mod rustc_server;
mod dylib;
use proc_macro::bridge::client::TokenStream;
use proc_macro_api::{ExpansionResult, ExpansionTask, ListMacrosResult, ListMacrosTask};
use std::{
collections::{hash_map::Entry, HashMap},
fs,
path::{Path, PathBuf},
time::SystemTime,
};
#[derive(Default)]
pub(crate) struct ProcMacroSrv {
expanders: HashMap<(PathBuf, SystemTime), dylib::Expander>,
}
impl ProcMacroSrv {
pub fn expand(&mut self, task: &ExpansionTask) -> Result<ExpansionResult, String> {
let expander = self.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 fn list_macros(&mut self, task: &ListMacrosTask) -> Result<ListMacrosResult, String> {
let expander = self.expander(&task.lib)?;
Ok(ListMacrosResult { macros: expander.list_macros() })
}
fn expander(&mut self, path: &Path) -> Result<&dylib::Expander, String> {
let time = fs::metadata(path).and_then(|it| it.modified()).map_err(|err| {
format!("Failed to get file metadata for {}: {:?}", path.display(), err)
})?;
Ok(match self.expanders.entry((path.to_path_buf(), time)) {
Entry::Vacant(v) => v.insert(dylib::Expander::new(path).map_err(|err| {
format!("Cannot create expander for {}: {:?}", path.display(), err)
})?),
Entry::Occupied(e) => e.into_mut(),
})
}
}
pub mod cli;
#[cfg(test)]
mod tests;