Class: Rudelo::Parsers::SetLogicTransform::MatchExpr

Inherits:
Struct
  • Object
show all
Defined in:
lib/rudelo/parsers/set_logic_transform.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#in_set ⇒ Object

Returns the value of attribute in_set

Returns:

  • (Object) —

    the current value of in_set



66
67
68
 
# File 'lib/rudelo/parsers/set_logic_transform.rb', line 66

def in_set
  @in_set
end

#left ⇒ Object

Returns the value of attribute left

Returns:

  • (Object) —

    the current value of left



66
67
68
 
# File 'lib/rudelo/parsers/set_logic_transform.rb', line 66

def left
  @left
end

#right ⇒ Object

Returns the value of attribute right

Returns:

  • (Object) —

    the current value of right



66
67
68
 
# File 'lib/rudelo/parsers/set_logic_transform.rb', line 66

def right
  @right
end

Instance Method Details

#eval(in_set_override = nil) ⇒ Object 



67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
 
# File 'lib/rudelo/parsers/set_logic_transform.rb', line 67

def eval(in_set_override=nil)
  # I've always wondered what these replace methods were for
  # and now I know. To make references more pointery.
  # The purpose of this is so we can construct a transform
  # once and use it with different values for in_set.
  in_set.replace(in_set_override) unless in_set_override.nil?
  lvalue = left.eval
  case lvalue
  when ::Set
    right.empty? ? (lvalue.size > 0) : right.eval(lvalue)
  when ::TrueClass, ::FalseClass
    lvalue && right.eval(left.set)
  else
    nil
  end
end