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//! Proc Macro Expander stub
use crate::{db::AstDatabase, LazyMacroId, MacroCallKind, MacroCallLoc};
use ra_db::CrateId;
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
pub struct ProcMacroExpander {
krate: CrateId,
}
impl ProcMacroExpander {
pub fn new(krate: CrateId) -> ProcMacroExpander {
ProcMacroExpander { krate }
}
pub fn expand(
&self,
db: &dyn AstDatabase,
id: LazyMacroId,
_tt: &tt::Subtree,
) -> Result<tt::Subtree, mbe::ExpandError> {
let loc: MacroCallLoc = db.lookup_intern_macro(id);
let name = match loc.kind {
MacroCallKind::FnLike(_) => return Err(mbe::ExpandError::ConversionError),
MacroCallKind::Attr(_, name) => name,
};
log::debug!("Proc-macro-expanding name = {}", name);
// Return nothing for now
return Ok(tt::Subtree::default());
}
}
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