Class: Sequence::SingleItem

Inherits:
Sequence show all
Includes:
ArrayLike
Defined in:
lib/sequence/singleitem.rb

Overview

represnts a seq over a single item

Constant Summary

Constants inherited from Sequence

SubSequence, VERSION

Instance Attribute Summary

Attributes inherited from Sequence

#last_match, #maxmatchlen

Instance Method Summary collapse

Methods included from ArrayLike

#data_class, #index, #like, #new_data, #push, #rindex, #scan, #scan_until, #scanback, #scanback_until, #unshift

Methods inherited from Sequence

#+, #-, #<<, [], #[], #[]=, #_adjust_pos_on_change, #_default_maxmatchlen, #_delete_position, #_normalize_pos, #_parse_slice_args, #all_data, #append, #begin, #check, #check_until, #checkback, #checkback_until, #close, #closed?, #delete, #each, #empty?, #end, #exist?, #existback?, #first, #goto, #holding, #holding!, #holding?, #holding_position, #holding_position!, #holding_position?, #insert, #last, #length, #match?, #matchback?, #modify, #more_data?, #move, #move!, #nearbegin, #nearend, #new, #notify_change, #on_change_notify, #original__new, #overwrite, #pop, #pos=, #pos?, #position, #position=, #position?, #pred, #prepend, #prop, #read!, #readahead, #readback, #readback1, #readbehind, #readbehind1, #rest_size, #reversed, #shift, #skip, #skip_literal, #skip_until, #skip_until_literal, #skipback, #skipback_until, #slice, #slice!, #slice1, #slice1!, #subseq, #succ, #to_sequence, #was_data?, #write, #writeahead, #writeback, #writebehind

Constructor Details

#initialize(obj) ⇒ SingleItem

Returns a new instance of SingleItem.



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# File 'lib/sequence/singleitem.rb', line 9

def initialize(obj)
  @obj=obj
  @eof=false
end

Instance Method Details

#_pos=(pos) ⇒ Object 



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# File 'lib/sequence/singleitem.rb', line 46

def _pos=(pos)
  @eof=pos.nonzero?
end

#begin! ⇒ Object 



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# File 'lib/sequence/singleitem.rb', line 34

def begin!
  @eof=false
end

#end! ⇒ Object 



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# File 'lib/sequence/singleitem.rb', line 38

def end!
  @eof=true
end

#eof? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sequence/singleitem.rb', line 26

def eof?; @eof end

#pos ⇒ Object 



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# File 'lib/sequence/singleitem.rb', line 42

def pos
  @eof ? 1 : 0
end

#read(len) ⇒ Object 



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# File 'lib/sequence/singleitem.rb', line 28

def read(len)
  @eof and return []
  @eof=true
  return [@obj]
end

#read1 ⇒ Object 



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# File 'lib/sequence/singleitem.rb', line 14

def read1
  result=readahead1
  @eof=true
  result
end

#readahead1 ⇒ Object 



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# File 'lib/sequence/singleitem.rb', line 20

def readahead1
  @obj unless @eof
end

#size ⇒ Object 



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# File 'lib/sequence/singleitem.rb', line 24

def size; 1 end