Module: Enum::ClassMethods

Defined in:
lib/emery/enum.rb

Instance Method Summary collapse

Instance Method Details

#check(value) ⇒ Object 



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# File 'lib/emery/enum.rb', line 17

def check(value)
  T.check_not_nil(self, value)
  if !value?(value)
    raise TypeError.new("Value '#{value.inspect.to_s}' is not a member of enum #{self}")
  end
end

#define(key, value) ⇒ Object 



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# File 'lib/emery/enum.rb', line 24

def define(key, value)
  @_enum_hash ||= {}
  @_enums_by_value ||= {}

  if @_enum_hash.key?(key) then
    raise TypeError.new("Duplicate key: #{key}")
  end

  if @_enums_by_value.key?(value) then
    raise TypeError.new("Duplicate value: #{value}")
  end

  new_instance = new(key, value)
  @_enum_hash[key] = new_instance
  @_enums_by_value[value] = new_instance

  if key.to_s == key.to_s.upcase
    const_set key, value
  else
    define_singleton_method(key) { value }
  end
end

#each(&block) ⇒ Object 



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# File 'lib/emery/enum.rb', line 47

def each(&block)
  @_enum_hash.each(&block)
end

#key(v) ⇒ Object 



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# File 'lib/emery/enum.rb', line 72

def key(v)
  enum = @_enums_by_value[v]
  enum.key if enum
end

#key?(k) ⇒ Boolean

Returns:



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# File 'lib/emery/enum.rb', line 59

def key?(k)
  @_enum_hash.key?(k)
end

#keys ⇒ Object 



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# File 'lib/emery/enum.rb', line 77

def keys
  @_enum_hash.values.map(&:key)
end

#parse(k) ⇒ Object 



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# File 'lib/emery/enum.rb', line 51

def parse(k)
  k = k.to_s.upcase
  each do |key, enum|
    return enum.value if key.to_s.upcase == k
  end
  nil
end

#to_h ⇒ Object 



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# File 'lib/emery/enum.rb', line 85

def to_h
  Hash[@_enum_hash.map do |key, enum|
    [key, enum.value]
  end]
end

#value(k) ⇒ Object 



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# File 'lib/emery/enum.rb', line 63

def value(k)
  enum = @_enum_hash[k]
  enum.value if enum
end

#value?(v) ⇒ Boolean

Returns:



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# File 'lib/emery/enum.rb', line 68

def value?(v)
  @_enums_by_value.key?(v)
end

#values ⇒ Object 



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# File 'lib/emery/enum.rb', line 81

def values
  @_enum_hash.values.map(&:value)
end