| // Copyright 2023 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| //! General helpers |
| |
| /// Given a `Result<_, E>` expression where `E: Display`, log the `Err(e)` case |
| /// and pass the result through. |
| #[macro_export] |
| macro_rules! log_err { |
| ($res_expr:expr, $ctx:expr $(, $name:ident = $arg:expr)*) => { |
| { |
| let res = $res_expr; |
| if let Err(e) = &res { |
| ::log::error!(concat!($ctx, ": {__error}"), __error = e $(, $name = $arg)*); |
| } |
| res |
| } |
| }; |
| |
| ($res_expr:expr) => { |
| { |
| let res = $res_expr; |
| if let Err(e) = &res { |
| ::log::error!("`{expr_str}`: {e}", expr_str = stringify!($res_expr)); |
| } |
| res |
| } |
| } |
| } |
| |
| /// Wrap a value `T: Debug` to give it a `Display` instance. |
| pub struct AsDebug<T>(pub T); |
| |
| impl<T: std::fmt::Debug> std::fmt::Display for AsDebug<T> { |
| fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result { |
| <T as std::fmt::Debug>::fmt(&self.0, f) |
| } |
| } |
