diff options
Diffstat (limited to 'compiler/rustc_ast_pretty/src/pprust/state/expr.rs')
| -rw-r--r-- | compiler/rustc_ast_pretty/src/pprust/state/expr.rs | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/compiler/rustc_ast_pretty/src/pprust/state/expr.rs b/compiler/rustc_ast_pretty/src/pprust/state/expr.rs index dce76fb1e77..ab1dd46fe33 100644 --- a/compiler/rustc_ast_pretty/src/pprust/state/expr.rs +++ b/compiler/rustc_ast_pretty/src/pprust/state/expr.rs @@ -245,19 +245,21 @@ impl<'a> State<'a> { base_args: &[P<ast::Expr>], fixup: FixupContext, ) { - // Unlike in `print_expr_call`, no change to fixup here because + // The fixup here is different than in `print_expr_call` because // statement boundaries never occur in front of a `.` (or `?`) token. // - // match () { _ => f }.method(); + // Needs parens: + // + // (loop { break x; })(); + // + // Does not need parens: + // + // loop { break x; }.method(); // - // Parenthesizing only for precedence and not with regard to statement - // boundaries, `$receiver.method()` can be parsed back as a statement - // containing an expression if and only if `$receiver` can be parsed as - // a statement containing an expression. self.print_expr_cond_paren( receiver, receiver.precedence() < ExprPrecedence::Unambiguous, - fixup, + fixup.leftmost_subexpression_with_dot(), ); self.word("."); @@ -503,7 +505,7 @@ impl<'a> State<'a> { self.print_expr_cond_paren( expr, expr.precedence() < ExprPrecedence::Unambiguous, - fixup, + fixup.leftmost_subexpression_with_dot(), ); self.word_nbsp(".match"); } @@ -567,7 +569,7 @@ impl<'a> State<'a> { self.print_expr_cond_paren( expr, expr.precedence() < ExprPrecedence::Unambiguous, - fixup, + fixup.leftmost_subexpression_with_dot(), ); self.word(".await"); } @@ -606,7 +608,7 @@ impl<'a> State<'a> { self.print_expr_cond_paren( expr, expr.precedence() < ExprPrecedence::Unambiguous, - fixup, + fixup.leftmost_subexpression_with_dot(), ); self.word("."); self.print_ident(*ident); @@ -763,7 +765,11 @@ impl<'a> State<'a> { } } ast::ExprKind::Try(e) => { - self.print_expr_cond_paren(e, e.precedence() < ExprPrecedence::Unambiguous, fixup); + self.print_expr_cond_paren( + e, + e.precedence() < ExprPrecedence::Unambiguous, + fixup.leftmost_subexpression_with_dot(), + ); self.word("?") } ast::ExprKind::TryBlock(blk) => { |
