Class: Keisan::AST::Indexing

Inherits:
UnaryOperator show all
Defined in:
lib/keisan/ast/indexing.rb

Constant Summary

Constants inherited from Operator

Operator::ARITIES, Operator::ARITY_PRIORITY_ASSOCIATIVITY, Operator::ASSOCIATIVITIES, Operator::ASSOCIATIVITY_OF_PRIORITY, Operator::PRIORITIES

Instance Attribute Summary collapse

Attributes inherited from Parent

#children

Instance Method Summary collapse

Methods inherited from UnaryOperator

arity, associativity, #child, priority

Methods inherited from Operator

arity, #arity, associativity, #associativity, associativity_of_priority, #blank_value, #priority, priority, #symbol, symbol

Methods inherited from Parent

#==, #deep_dup, #freeze, #unbound_functions, #unbound_variables

Methods inherited from Node

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

Constructor Details

#initialize(child, indexes = []) ⇒ Indexing

Returns a new instance of Indexing.



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# File 'lib/keisan/ast/indexing.rb', line 6

def initialize(child, indexes = [])
  @children = [child]
  @indexes = indexes
end

Instance Attribute Details

#indexes ⇒ Object (readonly)

Returns the value of attribute indexes.



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

def indexes
  @indexes
end

Instance Method Details

#evaluate(context = nil) ⇒ Object 



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

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

  evaluate_list(context) || evaluate_hash(context) || self
end

#evaluate_assignments(context = nil) ⇒ Object 



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

def evaluate_assignments(context = nil)
  self
end

#replace(variable, replacement) ⇒ Object 



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# File 'lib/keisan/ast/indexing.rb', line 35

def replace(variable, replacement)
  super
  @indexes = indexes.map {|index| index.replace(variable, replacement)}
end

#simplify(context = nil) ⇒ Object 



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# File 'lib/keisan/ast/indexing.rb', line 31

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

#to_s ⇒ Object 



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# File 'lib/keisan/ast/indexing.rb', line 15

def to_s
  "(#{child.to_s})[#{indexes.map(&:to_s).join(',')}]"
end

#value(context = nil) ⇒ Object 



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# File 'lib/keisan/ast/indexing.rb', line 11

def value(context = nil)
  return child.value(context).send(:[], *indexes.map {|index| index.value(context)})
end