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#[cfg(feature = "std")]
pub(crate) use std::backtrace::Backtrace;
#[cfg(not(feature = "std"))]
pub(crate) enum Backtrace {}
#[cfg(feature = "std")]
macro_rules! backtrace {
() => {
Some(std::backtrace::Backtrace::capture())
};
}
#[cfg(not(feature = "std"))]
macro_rules! backtrace {
() => {
None
};
}
#[cfg(error_generic_member_access)]
macro_rules! backtrace_if_absent {
($err:expr) => {
match $crate::nightly::request_ref_backtrace($err as &dyn core::error::Error) {
Some(_) => None,
None => backtrace!(),
}
};
}
#[cfg(all(not(error_generic_member_access), feature = "std"))]
macro_rules! backtrace_if_absent {
($err:expr) => {
backtrace!()
};
}
#[cfg(all(not(anyhow_no_core_error), not(feature = "std")))]
macro_rules! backtrace_if_absent {
($err:expr) => {
None
};
}
fn _assert_send_sync() {
fn assert<T: Send + Sync>() {}
assert::<Backtrace>();
}
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