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Add ProcMacroClient

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This commit is contained in:
Edwin Cheng 2020-03-18 20:56:46 +08:00
parent a617f24eae
commit d0b6ed4441
17 changed files with 222 additions and 43 deletions
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30
crates/ra_hir_expand/src/proc_macro.rs
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@ -1,33 +1,31 @@
//! Proc Macro Expander stub
use crate::{db::AstDatabase, LazyMacroId, MacroCallKind, MacroCallLoc};
use ra_db::CrateId;
use crate::{db::AstDatabase, LazyMacroId};
use ra_db::{CrateId, ProcMacroId};
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
pub struct ProcMacroExpander {
krate: CrateId,
proc_macro_id: ProcMacroId,
}
impl ProcMacroExpander {
pub fn new(krate: CrateId) -> ProcMacroExpander {
ProcMacroExpander { krate }
pub fn new(krate: CrateId, proc_macro_id: ProcMacroId) -> ProcMacroExpander {
ProcMacroExpander { krate, proc_macro_id }
}
pub fn expand(
&self,
db: &dyn AstDatabase,
id: LazyMacroId,
_tt: &tt::Subtree,
_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());
let krate_graph = db.crate_graph();
let proc_macro = krate_graph[self.krate]
.proc_macro
.get(self.proc_macro_id.0)
.clone()
.ok_or_else(|| mbe::ExpandError::ConversionError)?;
proc_macro.custom_derive(tt)
}
}