91     use crate::parse::discouraged::Speculative as _;
156                 while let semi @ Some(_) = input.parse()? {  in parse_within()
168                     Stmt::Local(_) | Stmt::Item(_) | Stmt::Expr(_, Some(_)) => false,  in parse_within()
349                 Expr::Array(_)  in stmt_expr()
350                 | Expr::Async(_)  in stmt_expr()
351                 | Expr::Await(_)  in stmt_expr()
352                 | Expr::Block(_)  in stmt_expr()
353                 | Expr::Break(_)  in stmt_expr()
354                 | Expr::Call(_)  in stmt_expr()
355                 | Expr::Closure(_)  in stmt_expr()
356                 | Expr::Const(_)  in stmt_expr()
357                 | Expr::Continue(_)  in stmt_expr()
358                 | Expr::Field(_)  in stmt_expr()
359                 | Expr::ForLoop(_)  in stmt_expr()
360                 | Expr::Group(_)  in stmt_expr()
361                 | Expr::If(_)  in stmt_expr()
362                 | Expr::Index(_)  in stmt_expr()
363                 | Expr::Infer(_)  in stmt_expr()
364                 | Expr::Let(_)  in stmt_expr()
365                 | Expr::Lit(_)  in stmt_expr()
366                 | Expr::Loop(_)  in stmt_expr()
367                 | Expr::Macro(_)  in stmt_expr()
368                 | Expr::Match(_)  in stmt_expr()
369                 | Expr::MethodCall(_)  in stmt_expr()
370                 | Expr::Paren(_)  in stmt_expr()
371                 | Expr::Path(_)  in stmt_expr()
372                 | Expr::Range(_)  in stmt_expr()
373                 | Expr::RawAddr(_)  in stmt_expr()
374                 | Expr::Reference(_)  in stmt_expr()
375                 | Expr::Repeat(_)  in stmt_expr()
376                 | Expr::Return(_)  in stmt_expr()
377                 | Expr::Struct(_)  in stmt_expr()
378                 | Expr::Try(_)  in stmt_expr()
379                 | Expr::TryBlock(_)  in stmt_expr()
380                 | Expr::Tuple(_)  in stmt_expr()
381                 | Expr::Unary(_)  in stmt_expr()
382                 | Expr::Unsafe(_)  in stmt_expr()
383                 | Expr::While(_)  in stmt_expr()
384                 | Expr::Yield(_)  in stmt_expr()
385                 | Expr::Verbatim(_) => break,  in stmt_expr()
403             _ => {}  in stmt_expr()
468                         _ => token::Brace::default().surround(tokens, |tokens| {  in to_tokens()