Class: Code::Node::If

Inherits:
Code::Node show all
Defined in:
lib/code/node/if.rb

Defined Under Namespace

Classes: Else

Constant Summary collapse

IF_KEYWORD = 
"if"
UNLESS_KEYWORD = 
"unless"
ELSIF_KEYWORD = 
"elsif"
ELSE_KEYWORD = 
"else"

Instance Method Summary collapse

Constructor Details

#initialize(parsed) ⇒ If

Returns a new instance of If.



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# File 'lib/code/node/if.rb', line 22

def initialize(parsed)
  @first_operator = parsed.delete(:first_operator)
  @first_statement = Node::Statement.new(parsed.delete(:first_statement))
  @first_body = Node::Code.new(parsed.delete(:first_body))
  @elses =
    parsed.delete(:elses) { [] }.map { |elses| Node::If::Else.new(elses) }
  super(parsed)
end

Instance Method Details

#evaluate(**args) ⇒ Object 



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# File 'lib/code/node/if.rb', line 31

def evaluate(**args)
  if @first_operator == IF_KEYWORD &&
       @first_statement.evaluate(**args).truthy?
    @first_body.evaluate(**args)
  elsif @first_operator == UNLESS_KEYWORD &&
        @first_statement.evaluate(**args).falsy?
    @first_body.evaluate(**args)
  else
    @elses.each do |elses|
      if elses.operator == ELSIF_KEYWORD &&
           elses.statement.evaluate(**args).truthy?
        return elses.body.evaluate(**args)
      elsif elses.operator == IF_KEYWORD &&
            elses.statement.evaluate(**args).truthy?
        return elses.body.evaluate(**args)
      elsif elses.operator == UNLESS_KEYWORD &&
            elses.statement.evaluate(**args).falsy?
        return elses.body.evaluate(**args)
      elsif elses.operator == ELSE_KEYWORD
        return elses.body.evaluate(**args)
      end
    end

    ::Code::Object::Nothing.new
  end
end