Class: StackPath

Inherits:
Object show all
Defined in:
lib/rpdf2txt-rockit/glr_parser.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(from, links = []) ⇒ StackPath

Returns a new instance of StackPath.



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# File 'lib/rpdf2txt-rockit/glr_parser.rb', line 368

def initialize(from, links = [])
  @from, @links = from, Array.new
  links.each {|link| self.add_link(link)}
end

Instance Attribute Details

#from ⇒ Object (readonly)

Returns the value of attribute from.



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# File 'lib/rpdf2txt-rockit/glr_parser.rb', line 365

def from
  @from
end

#links ⇒ Object (readonly)

Returns the value of attribute links.



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# File 'lib/rpdf2txt-rockit/glr_parser.rb', line 366

def links
  @links
end

#to ⇒ Object (readonly)

Returns the value of attribute to.



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# File 'lib/rpdf2txt-rockit/glr_parser.rb', line 365

def to
  @to
end

Instance Method Details



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# File 'lib/rpdf2txt-rockit/glr_parser.rb', line 373

def add_link(link)
  @links.push link
  @to = link.stack
end

#add_path(aStackPath) ⇒ Object 



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# File 'lib/rpdf2txt-rockit/glr_parser.rb', line 378

def add_path(aStackPath)
  @links.concat aStackPath.links
  @to = @links.last.stack
  self
end

#includes_link?(link) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rpdf2txt-rockit/glr_parser.rb', line 384

def includes_link?(link)
  @links.detect {|l| l==link}
end

#inspect ⇒ Object 



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# File 'lib/rpdf2txt-rockit/glr_parser.rb', line 388

def inspect
  "#{from.state}(#{from.lexer.position.char_position}) " +
    @links.map {|l| "-#{l.tree.inspect}-> #{l.stack.state} (#{l.stack.lexer.position.char_position}) "}.join
end