Class: Pegex::Input

Inherits:
Object
  • Object
show all
Defined in:
lib/pegex/input.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize {|_self| ... } ⇒ Input

Returns a new instance of Input.

Yields:

  • (_self)

Yield Parameters:

  • _self (Pegex::Input) —

    the object that the method was called on



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# File 'lib/pegex/input.rb', line 6

def initialize
  @is_eof = false
  @is_open = false
  @is_close = false
  yield self
end

Instance Attribute Details

#string ⇒ Object

Returns the value of attribute string.



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# File 'lib/pegex/input.rb', line 4

def string
  @string
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/pegex/input.rb', line 26

def close
  fail "Attempted to close an unopen Pegex::Input object" \
    if @is_close
  @is_open = false
  @is_close = true
  @buffer = nil
  return self
end

#open ⇒ Object 



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# File 'lib/pegex/input.rb', line 20

def open
  @buffer = @string \
    or fail "Pegex::Input::open failed. No source to open"
  @is_open = true
end

#open? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pegex/input.rb', line 35

def open?
  @is_open
end

#read ⇒ Object 



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# File 'lib/pegex/input.rb', line 13

def read
  buffer = @buffer
  @buffer = nil
  @eof = true
  return buffer
end