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"

Instance Method Summary collapse

Constructor Details

#initialize(if_parsed) ⇒ If

Returns a new instance of If.



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# File 'lib/code/node/if.rb', line 21

def initialize(if_parsed)
  @if_operator = if_parsed.fetch(:if_operator)
  @if_statement =
    ::Code::Node::Statement.new(if_parsed.fetch(:if_statement))
  @if_body = ::Code::Node::Code.new(if_parsed.fetch(:if_body))
  @elses = if_parsed.fetch(:elses, [])
  @elses.map! { |else_parsed| ::Code::Node::If::Else.new(else_parsed) }
end

Instance Method Details

#evaluate(**args) ⇒ Object 



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# File 'lib/code/node/if.rb', line 30

def evaluate(**args)
  if_object = @if_statement.evaluate(**args)

  if @if_operator == IF_KEYWORD && if_object.truthy?
    @if_body.evaluate(**args)
  elsif @if_operator == UNLESS_KEYWORD && if_object.falsy?
    @if_body.evaluate(**args)
  else
    @elses.each do |else_node|
      if else_node.operator == IF_KEYWORD
        else_object = else_node.statement.evaluate(**args)
        return else_node.body.evaluate(**args) if else_object.truthy?
      elsif else_node.operator == UNLESS_KEYWORD
        else_object = else_node.statement.evaluate(**args)
        return else_node.body.evaluate(**args) if else_object.falsy?
      elsif else_node.operator.nil?
        return else_node.body.evaluate(**args)
      end
    end

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