Class: Gobstones::Lang::Commands::MultipleAssignment

Inherits:
Object
  • Object
show all
Includes:
EqualityDefinition
Defined in:
lib/gobstones/lang/commands/multiple_assignment.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from EqualityDefinition

#==

Constructor Details

#initialize(var_tuple, expression) ⇒ MultipleAssignment

Returns a new instance of MultipleAssignment.



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# File 'lib/gobstones/lang/commands/multiple_assignment.rb', line 11

def initialize(var_tuple, expression)
  @var_tuple = var_tuple
  @expression = expression
end

Instance Attribute Details

#expression ⇒ Object (readonly)

Returns the value of attribute expression.



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# File 'lib/gobstones/lang/commands/multiple_assignment.rb', line 9

def expression
  @expression
end

#var_tuple ⇒ Object (readonly)

Returns the value of attribute var_tuple.



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# File 'lib/gobstones/lang/commands/multiple_assignment.rb', line 9

def var_tuple
  @var_tuple
end

Instance Method Details

#equality_attributes ⇒ Object 



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# File 'lib/gobstones/lang/commands/multiple_assignment.rb', line 16

def equality_attributes
  i[var_tuple expression]
end

#evaluate(context) ⇒ Object 



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# File 'lib/gobstones/lang/commands/multiple_assignment.rb', line 20

def evaluate(context)
  # TODO implement as many simple assignments?
  validate_expression_is_function_call
  function_call_result = expression.evaluate(context)
  check_number_of_arguments(function_call_result)
  function_call_result.length.times do |index|
    context.set(var_tuple.variable_at(index), function_call_result[index])
  end
end