commit 7eb4c23133611333b835471ee3b9b1a5f92d6cf0
author Marcel van Lohuizen <mpvl@golang.org> Tue Sep 23 09:12:29 2014 +0200
committer Marcel van Lohuizen <mpvl@golang.org> Tue Sep 23 09:12:29 2014 +0200
tree 737053de3b8d9b62e2c4b99981542f1419a7fd81
parent d17d24a8053c2b438d5b92fe2da578be2b5950af

go.text.transform: added Reset method to Transformer interface.

Reasons to pick explicit Reset instead of optional one:
- Explict reset is about 3-4 times faster.
- More Transformers than I expected (7 of 19 currently in go.text) can use
  a Reset method to some extent.
- Simpler code overall compared to an implementation of an optional Reset.
- Makes it easier to change implementations that currently don't need
  a Reset method to use one later.

I'm somewhat ambivalent about the NopResetter type, but it does simplify
the code a bit. One notable advantage is that it gives standardized
documentation for the Reset method of types embedding this type.

LGTM=nigeltao
R=nigeltao
CC=golang-codereviews
https://golang.org/cl/144400043