| 1 | #[cfg(backtrace)] |
|---|---|
| 2 | pub(crate) use std::backtrace::Backtrace; |
| 3 | |
| 4 | #[cfg(not(backtrace))] |
| 5 | pub(crate) enum Backtrace {} |
| 6 | |
| 7 | #[cfg(backtrace)] |
| 8 | macro_rules! backtrace_if_absent { |
| 9 | ($err:expr) => { |
| 10 | match $err.backtrace() { |
| 11 | Some(_) => None, |
| 12 | None => Some(Backtrace::capture()), |
| 13 | } |
| 14 | }; |
| 15 | } |
| 16 | |
| 17 | #[cfg(not(backtrace))] |
| 18 | macro_rules! backtrace_if_absent { |
| 19 | ($err:expr) => { |
| 20 | None |
| 21 | }; |
| 22 | } |
| 23 |