Class: Algebrick::Matchers::Abstract

Inherits:

Object

• Object
• Algebrick::Matchers::Abstract

show all

Includes:

TypeCheck

Defined in:

lib/algebrick/matchers/abstract.rb

Instance Attribute Summary (collapse)

• - (Object) value readonly

  Returns the value of attribute value.

Instance Method Summary (collapse)

• - (Object) !
• - (Object) &(matcher)
• - (Object) ==(other)
• - (Object) ===(other)
• - (Object) >(block) (also: #>>)
• - (Object) assign! (also: #~)
• - (Boolean) assign?
• - (Object) assign_to_s
• - (Boolean) assigned?
• - (Object) assigns
• - (Object) case(&block) (also: #when)
• - (Object) children
• - (Object) children_including_self
• - (Object) collect_assigns private
• - (Object) find_children(collection) private
• - (Abstract) initialize constructor

  A new instance of Abstract.

• - (Object) inspect
• - (Object) matchable!(obj) private
• - (Boolean) matched?
• - (Boolean) matching?(other) protected
• - (Object) to_a
• - (Object) to_s
• - (Object) |(matcher)

Methods included from TypeCheck

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

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# File 'lib/algebrick/matchers/abstract.rb', line 21

def initialize
  @assign, @value, @matched = nil
end

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# File 'lib/algebrick/matchers/abstract.rb', line 19

def value
  @value
end

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# File 'lib/algebrick/matchers/abstract.rb', line 52

def !
  Not.new self
end

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# File 'lib/algebrick/matchers/abstract.rb', line 44

def &(matcher)
  And.new self, matcher
end

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# File 'lib/algebrick/matchers/abstract.rb', line 102

def ==(other)
  raise NotImplementedError
end

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# File 'lib/algebrick/matchers/abstract.rb', line 82

def ===(other)
  matching?(other).tap { |matched| @value = other if (@matched = matched) }
end

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# File 'lib/algebrick/matchers/abstract.rb', line 31

def >(block)
  return self, block
end

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# File 'lib/algebrick/matchers/abstract.rb', line 37

def assign!
  @assign = true
  self
end

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# File 'lib/algebrick/matchers/abstract.rb', line 56

def assign?
  @assign
end

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# File 'lib/algebrick/matchers/abstract.rb', line 86

def assign_to_s
  assign? ? '~' : ''
end

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# File 'lib/algebrick/matchers/abstract.rb', line 60

def assigned?
  !!@value
end

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# File 'lib/algebrick/matchers/abstract.rb', line 72

def assigns
  collect_assigns.tap do
    return yield *assigns if block_given?
  end
end

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# File 'lib/algebrick/matchers/abstract.rb', line 25

def case(&block)
  return self, block
end

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# File 'lib/algebrick/matchers/abstract.rb', line 94

def children
  raise NotImplementedError
end

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# File 'lib/algebrick/matchers/abstract.rb', line 68

def children_including_self
  children.unshift self
end

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# File 'lib/algebrick/matchers/abstract.rb', line 116

def collect_assigns
  mine = @assign ? [@value] : []
  children.inject(mine) { |assigns, child| assigns + child.assigns }
end

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# File 'lib/algebrick/matchers/abstract.rb', line 126

def find_children(collection)
  collection.map do |matcher|
    matcher if matcher.kind_of? Abstract
  end.compact
end

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# File 'lib/algebrick/matchers/abstract.rb', line 90

def inspect
  to_s
end

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# File 'lib/algebrick/matchers/abstract.rb', line 121

def matchable!(obj)
  raise ArgumentError, 'object does not respond to :===' unless obj.respond_to? :===
  obj
end

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# File 'lib/algebrick/matchers/abstract.rb', line 64

def matched?
  @matched
end

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# File 'lib/algebrick/matchers/abstract.rb', line 110

def matching?(other)
  raise NotImplementedError
end

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# File 'lib/algebrick/matchers/abstract.rb', line 78

def to_a
  assigns
end

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# File 'lib/algebrick/matchers/abstract.rb', line 98

def to_s
  raise NotImplementedError
end

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# File 'lib/algebrick/matchers/abstract.rb', line 48

def |(matcher)
  Or.new self, matcher
end