Make LhsExpr::AlreadyParsed a named struct

Author: WaffleLapkin

compiler/rustc_parse/src/parser/expr.rs

@@ -83,7 +83,7 @@ macro_rules! maybe_whole_expr {
 pub(super) enum LhsExpr {
     NotYetParsed,
     AttributesParsed(AttrWrapper),
-    AlreadyParsed(P<Expr>, bool), // (expr, starts_statement)
+    AlreadyParsed { expr: P<Expr>, starts_statement: bool },
 }
 
 impl From<Option<AttrWrapper>> for LhsExpr {
@@ -97,11 +97,11 @@ impl From<Option<AttrWrapper>> for LhsExpr {
 }
 
 impl From<P<Expr>> for LhsExpr {
-    /// Converts the `expr: P<Expr>` into `LhsExpr::AlreadyParsed(expr)`.
+    /// Converts the `expr: P<Expr>` into `LhsExpr::AlreadyParsed { expr, starts_statement: false }`.
     ///
     /// This conversion does not allocate.
     fn from(expr: P<Expr>) -> Self {
-        LhsExpr::AlreadyParsed(expr, false)
+        LhsExpr::AlreadyParsed { expr, starts_statement: false }
     }
 }
 
@@ -174,7 +174,7 @@ impl<'a> Parser<'a> {
         lhs: LhsExpr,
     ) -> PResult<'a, P<Expr>> {
         let mut starts_stmt = false;
-        let mut lhs = if let LhsExpr::AlreadyParsed(expr, starts_statement) = lhs {
+        let mut lhs = if let LhsExpr::AlreadyParsed { expr, starts_statement } = lhs {
             starts_stmt = starts_statement;
             expr
         } else {

compiler/rustc_parse/src/parser/stmt.rs

@@ -164,7 +164,10 @@ impl<'a> Parser<'a> {
             // Perform this outside of the `collect_tokens_trailing_token` closure,
             // since our outer attributes do not apply to this part of the expression
             let expr = self.with_res(Restrictions::STMT_EXPR, |this| {
-                this.parse_assoc_expr_with(0, LhsExpr::AlreadyParsed(expr, true))
+                this.parse_assoc_expr_with(
+                    0,
+                    LhsExpr::AlreadyParsed { expr, starts_statement: true },
+                )
             })?;
             Ok(self.mk_stmt(lo.to(self.prev_token.span), StmtKind::Expr(expr)))
         } else {
@@ -198,7 +201,10 @@ impl<'a> Parser<'a> {
             let e = self.mk_expr(lo.to(hi), ExprKind::MacCall(mac));
             let e = self.maybe_recover_from_bad_qpath(e)?;
             let e = self.parse_dot_or_call_expr_with(e, lo, attrs)?;
-            let e = self.parse_assoc_expr_with(0, LhsExpr::AlreadyParsed(e, false))?;
+            let e = self.parse_assoc_expr_with(
+                0,
+                LhsExpr::AlreadyParsed { expr: e, starts_statement: false },
+            )?;
             StmtKind::Expr(e)
         };
         Ok(self.mk_stmt(lo.to(hi), kind))