Class: PropInitializer::Property

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/prop_initializer/property.rb

Constant Summary collapse

ORDER = 
{ :positional => 0, :* => 1, :keyword => 2, :** => 3, :& => 4 }.freeze
RUBY_KEYWORDS = 
%i[alias and begin break case class def do else elsif end ensure false for if in module next nil not or redo rescue retry return self super then true undef unless until when while yield].to_h { |k| [k, "__#{k}__"] }.freeze
VISIBILITY_OPTIONS = 
Set[false, :private, :protected, :public].freeze
KIND_OPTIONS = 
Set[:positional, :*, :keyword, :**, :&].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name:, kind:, reader:, writer:, predicate:, default:, coercion:) ⇒ Property 



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# File 'lib/prop_initializer/property.rb', line 12

def initialize(name:, kind:, reader:, writer:, predicate:, default:, coercion:)
	@name = name
	@kind = kind
	@reader = reader
	@writer = writer
	@predicate = predicate
	@default = default
	@coercion = coercion
end

Instance Attribute Details

#coercion ⇒ Object (readonly)

Returns the value of attribute coercion.



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# File 'lib/prop_initializer/property.rb', line 22

def coercion
  @coercion
end

#default ⇒ Object (readonly)

Returns the value of attribute default.



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# File 'lib/prop_initializer/property.rb', line 22

def default
  @default
end

#kind ⇒ Object (readonly)

Returns the value of attribute kind.



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# File 'lib/prop_initializer/property.rb', line 22

def kind
  @kind
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/prop_initializer/property.rb', line 22

def name
  @name
end

#predicate ⇒ Object (readonly)

Returns the value of attribute predicate.



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# File 'lib/prop_initializer/property.rb', line 22

def predicate
  @predicate
end

#reader ⇒ Object (readonly)

Returns the value of attribute reader.



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# File 'lib/prop_initializer/property.rb', line 22

def reader
  @reader
end

#writer ⇒ Object (readonly)

Returns the value of attribute writer.



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# File 'lib/prop_initializer/property.rb', line 22

def writer
  @writer
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/prop_initializer/property.rb', line 73

def <=>(other)
	ORDER[@kind] <=> ORDER[other.kind]
end

#block? ⇒ Boolean 



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# File 'lib/prop_initializer/property.rb', line 48

def block?
	@kind == :&
end

#coerce(value, context:) ⇒ Object 



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# File 'lib/prop_initializer/property.rb', line 77

def coerce(value, context:)
	context.instance_exec(value, &@coercion)
end

#default? ⇒ Boolean 



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# File 'lib/prop_initializer/property.rb', line 52

def default?
	nil != @default
end

#default_value ⇒ Object 



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# File 'lib/prop_initializer/property.rb', line 89

def default_value
	case @default
		when Proc then @default.call
		else @default
	end
end

#double_splat? ⇒ Boolean 



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# File 'lib/prop_initializer/property.rb', line 44

def double_splat?
	@kind == :**
end

#escaped_name ⇒ Object 



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# File 'lib/prop_initializer/property.rb', line 85

def escaped_name
	RUBY_KEYWORDS[@name] || @name.name
end

#generate_initializer_handle_property(buffer = +"")) ⇒ Object 



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# File 'lib/prop_initializer/property.rb', line 127

def generate_initializer_handle_property(buffer = +"")
	buffer << "  # " << @name.name << "\n" <<
		"  property = properties[:" << @name.name << "]\n"

	if @kind == :keyword && ruby_keyword?
		generate_initializer_escape_keyword(buffer)
	end

	if default?
		generate_initializer_assign_default(buffer)
	end

	if @coercion
		generate_initializer_coerce_property(buffer)
	end

	generate_initializer_assign_value(buffer)
end

#generate_predicate_method(buffer = +"")) ⇒ Object 



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# File 'lib/prop_initializer/property.rb', line 115

def generate_predicate_method(buffer = +"")
	buffer <<
		(@predicate ? @predicate.name : "public") <<
		" def " <<
		@name.name <<
		"?\n" <<
		"  !!@" <<
		@name.name <<
		"\n" <<
		"end\n"
end

#generate_reader_method(buffer = +"")) ⇒ Object 



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# File 'lib/prop_initializer/property.rb', line 96

def generate_reader_method(buffer = +"")
	buffer <<
		(@reader ? @reader.name : "public") <<
		"\ndef " <<
		@name.name <<
		"\n  value = @" <<
		@name.name <<
		"\n  value\nend\n"
end

#generate_writer_method(buffer = +"")) ⇒ Object 



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# File 'lib/prop_initializer/property.rb', line 106

def generate_writer_method(buffer = +"")
	buffer <<
		(@writer ? @writer.name : "public") <<
		" def " <<
		@name.name <<
		"=(value)\n" <<
		"  @#{@name.name} = value\nend\n"
end

#keyword? ⇒ Boolean 



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# File 'lib/prop_initializer/property.rb', line 32

def keyword?
	@kind == :keyword
end

#optional? ⇒ Boolean 



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# File 'lib/prop_initializer/property.rb', line 24

def optional?
	default?
end

#param ⇒ Object 



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# File 'lib/prop_initializer/property.rb', line 56

def param
	case @kind
	when :*
		"*#{escaped_name}"
	when :**
		"**#{escaped_name}"
	when :&
		"&#{escaped_name}"
	when :positional
		escaped_name
	when :keyword
		"#{@name.name}:"
	else
		raise "You should never see this error."
	end
end

#positional? ⇒ Boolean 



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# File 'lib/prop_initializer/property.rb', line 36

def positional?
	@kind == :positional
end

#required? ⇒ Boolean 



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# File 'lib/prop_initializer/property.rb', line 28

def required?
	!optional?
end

#ruby_keyword? ⇒ Boolean 



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# File 'lib/prop_initializer/property.rb', line 81

def ruby_keyword?
	!!RUBY_KEYWORDS[@name]
end

#splat? ⇒ Boolean 



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# File 'lib/prop_initializer/property.rb', line 40

def splat?
	@kind == :*
end