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minor: Simplify #13123

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Merged
merged 1 commit into from
Aug 26, 2022
Merged

minor: Simplify #13123

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36 changes: 17 additions & 19 deletions crates/hir-ty/src/lower.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@
//!
//! This usually involves resolving names, collecting generic arguments etc.
use std::{
cell::{Cell, RefCell},
cell::{Cell, RefCell, RefMut},
iter,
sync::Arc,
};
Expand Down Expand Up @@ -330,26 +330,26 @@ impl<'a> TyLoweringContext<'a> {
}
}
TypeRef::Macro(macro_call) => {
let (expander, recursion_start) = {
let mut expander = self.expander.borrow_mut();
if expander.is_some() {
(Some(expander), false)
} else {
*expander = Some(Expander::new(
self.db.upcast(),
macro_call.file_id,
self.resolver.module(),
));
(Some(expander), true)
let (mut expander, recursion_start) = {
match RefMut::filter_map(self.expander.borrow_mut(), Option::as_mut) {
Ok(expander) => (expander, false),
Err(expander) => (
RefMut::map(expander, |it| {
it.insert(Expander::new(
self.db.upcast(),
macro_call.file_id,
self.resolver.module(),
))
}),
true,
),
}
};
let ty = if let Some(mut expander) = expander {
let expander_mut = expander.as_mut().unwrap();
let ty = {
let macro_call = macro_call.to_node(self.db.upcast());
match expander_mut.enter_expand::<ast::Type>(self.db.upcast(), macro_call) {
match expander.enter_expand::<ast::Type>(self.db.upcast(), macro_call) {
Ok(ExpandResult { value: Some((mark, expanded)), .. }) => {
let ctx =
LowerCtx::new(self.db.upcast(), expander_mut.current_file_id());
let ctx = LowerCtx::new(self.db.upcast(), expander.current_file_id());
let type_ref = TypeRef::from_ast(&ctx, expanded);

drop(expander);
Expand All @@ -364,8 +364,6 @@ impl<'a> TyLoweringContext<'a> {
}
_ => None,
}
} else {
None
};
if recursion_start {
*self.expander.borrow_mut() = None;
Expand Down