Class: Dhall::EmptyList

Inherits:
List show all
Defined in:
lib/dhall/ast.rb,
lib/dhall/binary.rb,
lib/dhall/normalize.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from List

as_dhall, #element_type, of

Methods inherited from Expression

#&, #*, #+, #as_dhall, #cache_key, #call, #deep_merge, #deep_merge_type, #dhall_eq, #digest, #fetch, #fusion, #merge, #resolve, #shift, #slice, #substitute, #to_binary, #to_cbor, #to_proc, #to_s, #|

Constructor Details

#initialize(attrs) ⇒ EmptyList

Returns a new instance of EmptyList.



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# File 'lib/dhall/ast.rb', line 469

def initialize(attrs)
  if attrs.key?(:element_type)
    et = attrs.delete(:element_type)
    attrs[:type] = self.class.as_dhall.call(et) if et
  end

  super
end

Class Method Details

.decode(type) ⇒ Object 



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# File 'lib/dhall/binary.rb', line 98

def self.decode(type)
  EmptyList.new(type: Dhall.decode(type))
end

Instance Method Details

#[](_) ⇒ Object 



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# File 'lib/dhall/ast.rb', line 500

def [](_)
  OptionalNone.new(value_type: element_type)
end

#as_json ⇒ Object 



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# File 'lib/dhall/ast.rb', line 478

def as_json
  [4, element_type.as_json]
rescue
  [28, type.as_json]
end

#concat(other) ⇒ Object 



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# File 'lib/dhall/ast.rb', line 520

def concat(other)
  other
end

#each ⇒ Object 



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# File 'lib/dhall/ast.rb', line 488

def each
  self
end

#first ⇒ Object 



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# File 'lib/dhall/ast.rb', line 504

def first
  OptionalNone.new(value_type: element_type)
end

#join ⇒ Object 



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# File 'lib/dhall/ast.rb', line 516

def join(*)
  ""
end

#last ⇒ Object 



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# File 'lib/dhall/ast.rb', line 508

def last
  OptionalNone.new(value_type: element_type)
end

#length ⇒ Object 



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# File 'lib/dhall/ast.rb', line 496

def length
  0
end

#map(type: nil) ⇒ Object 



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# File 'lib/dhall/ast.rb', line 484

def map(type: nil)
  type.nil? ? self : with(element_type: type)
end

#normalize ⇒ Object 



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# File 'lib/dhall/normalize.rb', line 247

def normalize
  super.with(type: type.normalize)
end

#reduce(z) ⇒ Object 



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# File 'lib/dhall/ast.rb', line 492

def reduce(z)
  z
end

#reverse ⇒ Object 



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# File 'lib/dhall/ast.rb', line 512

def reverse
  self
end