Error location utility macros

This project containst two utility macros and a function that can make the use of std::panic::catch_unwind more convenient.

Plese note, that stack unwinding is not an idiomatic Rust error handling (but may be useful nonetheless).

Usage example

```rust #[macrouse] extern crate errlocmacros;

std::panic::catch_unwind(|| {
    foo.api_call_that_shoud_not_fail.expect(errloc!());
}).unwrap_or_else(|e| {
    // output will include the location of "expect" call
    println!("Fatal fail: {:?}", errloc_macros::msg(&e));
});

```

License information

This project is released under the Apache License 2.0.

Changelog

2017-05-13