Class: NScript::ValueNode

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

Constant Summary collapse

SOAK = 
" == undefined ? undefined : "

Constants inherited from Node

Node::TAB

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Node

#children, children, #compile, #compile_closure, #contains?, #idt, statement, statement_only, #statement_only?, top_sensitive, #top_sensitive?, #write

Constructor Details

#initialize(base, properties = []) ⇒ ValueNode

Returns a new instance of ValueNode.



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# File 'lib/nscript/parser/nodes.rb', line 277

def initialize(base, properties=[])
  @base, @properties = base, [properties].flatten
end

Instance Attribute Details

#last ⇒ Object (readonly)

Returns the value of attribute last.



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# File 'lib/nscript/parser/nodes.rb', line 273

def last
  @last
end

#source ⇒ Object (readonly)

Returns the value of attribute source.



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# File 'lib/nscript/parser/nodes.rb', line 273

def source
  @source
end

Instance Method Details

#<<(other) ⇒ Object 



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# File 'lib/nscript/parser/nodes.rb', line 281

def <<(other)
  @properties << other
  self
end

#arguments? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nscript/parser/nodes.rb', line 302

def arguments?
  @base.to_s == 'arguments'
end

#array? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nscript/parser/nodes.rb', line 290

def array?
  @base.is_a?(ArrayNode) && !properties?
end

#compile_node(o) ⇒ Object 



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# File 'lib/nscript/parser/nodes.rb', line 314

def compile_node(o)
  soaked    = false
  only      = o.delete(:only_first)
  props     = only ? @properties[0...-1] : @properties
  baseline  = @base.compile(o)
  parts     = [baseline.dup]
  props.each do |prop|
    if prop.is_a?(AccessorNode) && prop.soak
      soaked = true
      if @base.is_a?(CallNode) && prop == props.first
        temp = o[:scope].free_variable
        parts[-1] = "(#{temp} = #{baseline})#{SOAK}#{baseline = temp.to_s + prop.compile(o)}"
      else
        parts[-1] << "#{SOAK}#{baseline += prop.compile(o)}"
      end
    else
      part = prop.compile(o)
      baseline += part
      parts << part
    end
  end
  @last = parts.last
  @source = parts.length > 1 ? parts[0...-1].join('') : nil
  code = parts.join('').gsub(')())', '()))')
  write(soaked ? "(#{code})" : code)
end

#object? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nscript/parser/nodes.rb', line 294

def object?
  @base.is_a?(ObjectNode) && !properties?
end

#properties? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nscript/parser/nodes.rb', line 286

def properties?
  return !@properties.empty? || @base.is_a?(ThisNode)
end

#splice? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nscript/parser/nodes.rb', line 298

def splice?
  properties? && @properties.last.is_a?(SliceNode)
end

#statement? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/nscript/parser/nodes.rb', line 310

def statement?
  @base.is_a?(Node) && @base.statement? && !properties?
end

#unwrap ⇒ Object 



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# File 'lib/nscript/parser/nodes.rb', line 306

def unwrap
  @properties.empty? ? @base : self
end