Function panic_context

pub fn panic_context(prefix: &'static str) -> UpdatablePanicContext

Creates panic context whose message may be updated.

prefix string will be prepended to each value provided to update method.

Usage

Bind panic context and use update method to update message. Message is automatically removed when panic context goes out of scope.

Example

let step = panic_context("step: ");
step.update("calculate lengths");
// ...
step.update("calculate signatures");
// ...
panic!("boom!");

Result:

Panic context:
step: calculate signatures
thread 'main' panicked at '...', src/libcore/str/mod.rs:2162
note: Run with `RUST_BACKTRACE=1` for a backtrace.