#### libremiliacr
#### Copyright(C) 2020-2024 Remilia Scarlet <remilia@posteo.jp>
####
#### This program is free software: you can redistribute it and/or modify
#### it under the terms of the GNU General Public License as published
#### the Free Software Foundation, either version 3 of the License, or
#### (at your option) any later version.
####
#### This program is distributed in the hope that it will be useful,
#### but WITHOUT ANY WARRANTY; without even the implied warranty of
#### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
#### GNU General Public License for more details.
####
#### You should have received a copy of the GNU General Public License
#### along with this program.If not, see<http:####www.gnu.org/licenses/.>
module RemiLib
# Defines an `Enum` that that allows you to map keys to specific strings. The
# enum keys still have numerical values just like any other `Enum`, but these
# numerical values cannot be specified.
macro defineStringEnum(name, *values)
enum {{name.id}}
{% for val in values %}
{% if val.is_a?(Assign) %}
{{val.target.id}}
{% else %}
{% raise "Only assignments are supported for string-like Enums" %}
{% end %}
{% end %}
def to_s(io : IO) : Nil
case self
{% for val in values %}
{% if val.is_a?(Assign) %}
in {{name.id}}::{{val.target.id}} then io << {{val.value}}
{% end %}
{% end %}
end
end
def to_s : String
case self
{% for val in values %}
{% if val.is_a?(Assign) %}
in {{name.id}}::{{val.target.id}} then {{val.value}}
{% end %}
{% end %}
end
end
def self.parse?(string : String) : self?
case string
{% for val in values %}
{% if val.is_a?(Assign) %}
when {{val.value}} then {{name.id}}::{{val.target.id}}
{% end %}
{% end %}
else nil
end
end
def self.parse(string : String) : self
self.parse?(string) || raise ArgumentError.new("Cannot parse string to a #{ {{@type}} }: #{string}")
end
end
end
end