Implement async blocks

2 files changed, 8 insertions, 2 deletions

diff --git a/crates/hir_def/src/body/lower.rs b/crates/hir_def/src/body/lower.rs
index 30ac12a12..c5ebc2aa0 100644
--- a/crates/hir_def/src/body/lower.rs
+++ b/crates/hir_def/src/body/lower.rs
@@ -239,7 +239,10 @@ impl ExprCollector<'_> {
                     None => self.missing_expr(),
                 },
                 // FIXME: we need to record these effects somewhere...
-                ast::Effect::Async(_) => self.collect_block_opt(e.block_expr()),
+                ast::Effect::Async(_) => {
+                    let body = self.collect_block_opt(e.block_expr());
+                    self.alloc_expr(Expr::Async { body }, syntax_ptr)
+                }
             },
             ast::Expr::BlockExpr(e) => self.collect_block(e),
             ast::Expr::LoopExpr(e) => {
diff --git a/crates/hir_def/src/expr.rs b/crates/hir_def/src/expr.rs
index c94b3a36f..e862c2080 100644
--- a/crates/hir_def/src/expr.rs
+++ b/crates/hir_def/src/expr.rs
@@ -111,6 +111,9 @@ pub enum Expr {
     TryBlock {
         body: ExprId,
     },
+    Async {
+        body: ExprId,
+    },
     Cast {
         expr: ExprId,
         type_ref: TypeRef,
@@ -250,7 +253,7 @@ impl Expr {
                     f(*expr);
                 }
             }
-            Expr::TryBlock { body } | Expr::Unsafe { body } => f(*body),
+            Expr::TryBlock { body } | Expr::Unsafe { body } | Expr::Async { body } => f(*body),
             Expr::Loop { body, .. } => f(*body),
             Expr::While { condition, body, .. } => {
                 f(*condition);