tree a3d52ac9134ba22a116f10ef350c6f038b1ac629
parent f45f2b7903d2db989402601ad8ec27eff5c1dc9d
author Dave Cheney <dave@cheney.net> 1465273385 +1000
committer Dave Cheney <dave@cheney.net> 1465273385 +1000

Introduce Stacktrace and Frame (#37)

* Introduce Stacktrace and Frame

This PR is a continuation of a series aimed at exposing the stack trace
information embedded in each error value. The secondary effect is to
deprecated the `Fprintf` helper.

Taking cues from from @chrishines' `stack` package this PR introduces a
new interface `Stacktrace() []Frame` and a `Frame` type, similar in
function to the `runtime.Frame` type (although lacking its iterator
type). Each `Frame` implemnts `fmt.Formatter` allowing it to print
itself.

The older `Location` interface is still supported but also deprecated.