Class: Keisan::AST::MultiLine

Inherits:
Parent show all
Defined in:
lib/keisan/ast/multi_line.rb

Instance Attribute Summary

Attributes inherited from Parent

#children

Instance Method Summary collapse

Methods inherited from Parent

#==, #deep_dup, #freeze, #initialize, #is_constant?, #replace, #traverse, #unbound_functions

Methods inherited from Node

#!, #%, #&, #*, #**, #+, #+@, #-, #-@, #/, #<, #<<, #<=, #>, #>=, #>>, #^, #and, #coerce, #contains_a?, #deep_dup, #differentiate, #differentiated, #equal, #evaluated, #false?, #is_constant?, #not_equal, #or, #replace, #replaced, #simplified, #to_cell, #to_node, #traverse, #true?, #unbound_functions, #well_defined?, #|, #~

Constructor Details

This class inherits a constructor from Keisan::AST::Parent

Instance Method Details

#evaluate(context = nil) ⇒ Object 



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# File 'lib/keisan/ast/multi_line.rb', line 13

def evaluate(context = nil)
  context ||= Context.new
  @children = children.map {|child| child.evaluate(context)}
  @children.last
end

#evaluate_assignments(context = nil) ⇒ Object 



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# File 'lib/keisan/ast/multi_line.rb', line 9

def evaluate_assignments(context = nil)
  self
end

#simplify(context = nil) ⇒ Object 



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# File 'lib/keisan/ast/multi_line.rb', line 19

def simplify(context = nil)
  evaluate(context)
end

#to_s ⇒ Object 



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# File 'lib/keisan/ast/multi_line.rb', line 40

def to_s
  children.map(&:to_s).join(";")
end

#unbound_variables(context = nil) ⇒ Object 



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# File 'lib/keisan/ast/multi_line.rb', line 23

def unbound_variables(context = nil)
  context ||= Context.new
  defined_variables = Set.new

  children.inject(Set.new) do |unbound_vars, child|
    if child.is_a?(Assignment) && child.is_variable_definition?
      line_unbound_vars = unbound_variables_for_line_variable_assignment(context, child, unbound_vars, defined_variables)
      if line_unbound_vars.empty?
        defined_variables.add(child.variable_name)
      end
      unbound_vars | line_unbound_vars
    else
      unbound_vars | (child.unbound_variables(context) - defined_variables)
    end
  end
end

#value(context = nil) ⇒ Object 



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# File 'lib/keisan/ast/multi_line.rb', line 4

def value(context = nil)
  context ||= Context.new
  evaluate(context).value(context)
end