rebar_erl_vsn
=====
defines for erlang versions
Build
-----
$ rebar3 compile
Use
---
Add the plugin to your rebar config:
```erlang
{plugins, [rebar_erl_vsn]}.
{provider_hooks, [{pre, [{compile, erl_vsn}]}]}.
```
Then just call your plugin directly in an existing application:
$ rebar3 compile
===> Fetching rebar_erl_vsn
===> Compiling rebar_erl_vsn
<Plugin Output>
Defines
-------
Each major/minor pair get a define like `17.5` or `18.0` in addition the following 'events' are defined too (in combination with the corresponding version):
* `new_hash` (`16.0`) - new crypto:hash functions are the default and old ones deprecated.
* `maps`, `namespaced_types` (`17.0`) - maps are introduced, types like `dict()` now require a namespace.
* `large_maps` (`18`) - large maps are now feasable, while in R17 they caused performance problems