[−][src]Struct failure::Backtrace
A Backtrace
.
This is an opaque wrapper around the backtrace provided by libbacktrace. A variety of optimizations have been performed to avoid unnecessary or ill-advised work:
- If this crate is compiled in
no_std
compatible mode,Backtrace
is an empty struct, and will be completely compiled away. - If this crate is run without the
RUST_BACKTRACE
environmental variable enabled, the backtrace will not be generated at runtime. - Even if a backtrace is generated, the most expensive part of generating a backtrace is symbol resolution. This backtrace does not perform symbol resolution until it is actually read (e.g. by printing it). If the Backtrace is never used for anything, symbols never get resolved.
Even with these optimizations, including a backtrace in your failure
may not be appropriate to your use case. You are not required to put a
backtrace in a custom Fail
type.
Methods
impl Backtrace
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pub fn new() -> Backtrace
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Constructs a new backtrace. This will only create a real backtrace
if the crate is compiled in std mode and the RUST_BACKTRACE
environmental variable is activated.
Trait Implementations
Auto Trait Implementations
Blanket Implementations
impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,