Class: Algebrick::Matchers::Array

Inherits:

Abstract

• Object
• Abstract
• Algebrick::Matchers::Array

show all

Defined in:

lib/algebrick/matchers/array.rb

Instance Attribute Summary (collapse)

• - (Object) matchers readonly

  Returns the value of attribute matchers.

Attributes inherited from Abstract

#value

Class Method Summary (collapse)

• + (Object) call(*matchers)

Instance Method Summary (collapse)

• - (Object) ==(other)
• - (Object) children
• - (Array) initialize(*matchers) constructor

  A new instance of Array.

• - (Boolean) matching?(other) protected
• - (Boolean) rest?
• - (Object) to_s

Methods inherited from Abstract

#!, #&, #===, #>, #assign!, #assign?, #assign_to_s, #assigned?, #assigns, #case, #children_including_self, #collect_assigns, #find_children, #inspect, #matchable!, #matched?, #to_a, #|

Methods included from TypeCheck

#Child!, #Child?, #Match!, #Match?, #Type!, #Type?, error

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# File 'lib/algebrick/matchers/array.rb', line 24

def initialize(*matchers)
  super()
  @matchers = matchers
  raise ArgumentError, 'many can be only last' if @matchers[0..-2].any? { |v| v.is_a?(Many) }
end

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# File 'lib/algebrick/matchers/array.rb', line 22

def matchers
  @matchers
end

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# File 'lib/algebrick/matchers/array.rb', line 18

def self.call(*matchers)
  new *matchers
end

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# File 'lib/algebrick/matchers/array.rb', line 38

def ==(other)
  other.kind_of? self.class and
      self.matchers == other.matchers
end

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# File 'lib/algebrick/matchers/array.rb', line 30

def children
  find_children @matchers
end

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# File 'lib/algebrick/matchers/array.rb', line 49

def matching?(other)
  return false unless other.kind_of? ::Array
  if rest?
    matchers[0..-2].zip(other).all? { |m, v| m === v } and
        matchers.last === other[(matchers.size-1)..-1]
  else
    matchers.size == other.size and
        matchers.zip(other).all? { |m, v| m === v }
  end
end

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# File 'lib/algebrick/matchers/array.rb', line 43

def rest?
  matchers.last.is_a?(Many)
end

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# File 'lib/algebrick/matchers/array.rb', line 34

def to_s
  "#{assign_to_s}#{"Array.(#{matchers.join(',')})" if matchers}"
end