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# Exception2MessageMapper
Helper module for easily defining exceptions with predefined messages.
## Installation
Add this line to your application's Gemfile:
```ruby
gem 'e2mmap'
```
And then execute:
$ bundle
Or install it yourself as:
$ gem install e2mmap
## Usage
1.
```
class Foo
extend Exception2MessageMapper
def_e2message ExistingExceptionClass, "message..."
def_exception :NewExceptionClass, "message..."[, superclass]
...
end
```
2.
```
module Error
extend Exception2MessageMapper
def_e2message ExistingExceptionClass, "message..."
def_exception :NewExceptionClass, "message..."[, superclass]
...
end
class Foo
include Error
...
end
foo = Foo.new
foo.Fail ....
```
3.
```
module Error
extend Exception2MessageMapper
def_e2message ExistingExceptionClass, "message..."
def_exception :NewExceptionClass, "message..."[, superclass]
...
end
class Foo
extend Exception2MessageMapper
include Error
...
end
Foo.Fail NewExceptionClass, arg...
Foo.Fail ExistingExceptionClass, arg...
```
## Development
After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake test` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
## Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/ruby/e2mmap.
## License
The gem is available as open source under the terms of the [2-Clause BSD License](https://opensource.org/licenses/BSD-2-Clause).
|
