Class: FuncCallNode

Inherits:
Node
  • Object
show all
Defined in:
lib/nodes/stmtnodes.rb

Instance Attribute Summary collapse

Attributes inherited from Node

#value

Instance Method Summary collapse

Constructor Details

#initialize(name, args) ⇒ FuncCallNode

Returns a new instance of FuncCallNode.



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# File 'lib/nodes/stmtnodes.rb', line 105

def initialize(name, args)
  @name = name
  @args = args
end

Instance Attribute Details

#args ⇒ Object

Returns the value of attribute args.



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# File 'lib/nodes/stmtnodes.rb', line 103

def args
  @args
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/nodes/stmtnodes.rb', line 103

def name
  @name
end

Instance Method Details

#create_tree_entry ⇒ Object 



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# File 'lib/nodes/stmtnodes.rb', line 118

def create_tree_entry
  result = set_up_scope_header
  result += "Function #{@name} is called"
  TREE_ARRAY << result unless TREE_ARRAY[-1] == result
end

#evaluate ⇒ Object 



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# File 'lib/nodes/stmtnodes.rb', line 124

def evaluate
  func = ScopeManager.lookup_func(@name)

  function_body = func[0]
  function_param = func[1]

  ScopeManager.increment_scope_level

  if function_param.is_a?(ArrayNode)
    function_param.each do |val, index|
      function_param[index] = VariableDecNode.new(function_param[index].name, @args[index])
      function_param[index].evaluate
    end
  end

  func_return_value = function_body.evaluate

  ScopeManager.decrement_scope_level

  # If function return value is an "Assign" then we declare that variable in the global scope.
  # This should be a ScopeManager method, add_variable_to_global_scope is missing.
  old_scope_lvl = ScopeManager.scope_lvl
  if func_return_value.is_a?(VariableDecNode)
    ScopeManager.scope_lvl = 0
    func_return_value.evaluate
    ScopeManager.scope_lvl = old_scope_lvl
  end

  create_tree_entry if PRINT_TREE_FLAG
  return func_return_value
end

#to_s ⇒ Object 



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# File 'lib/nodes/stmtnodes.rb', line 110

def to_s
  if @args == NilClass
    "#{name}()"
  else
    "#{name}(#{@args})"
  end
end