Class: ComponentEmbeddedRuby::Lexer::InputReader

Inherits:
Object
  • Object
show all
Defined in:
lib/component_embedded_ruby/lexer/input_reader.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ InputReader

Returns a new instance of InputReader.



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# File 'lib/component_embedded_ruby/lexer/input_reader.rb', line 6

def initialize(input)
  @input = input.freeze
  @position = 0

  @current_line = 0
  @current_column = 0
end

Instance Attribute Details

#current_column ⇒ Object (readonly)

Returns the value of attribute current_column.



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# File 'lib/component_embedded_ruby/lexer/input_reader.rb', line 4

def current_column
  @current_column
end

#current_line ⇒ Object (readonly)

Returns the value of attribute current_line.



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# File 'lib/component_embedded_ruby/lexer/input_reader.rb', line 4

def current_line
  @current_line
end

Instance Method Details

#current_char ⇒ Object 



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# File 'lib/component_embedded_ruby/lexer/input_reader.rb', line 18

def current_char
  input[@position]
end

#eof? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/component_embedded_ruby/lexer/input_reader.rb', line 14

def eof?
  @position == @input.length
end

#next ⇒ Object 



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# File 'lib/component_embedded_ruby/lexer/input_reader.rb', line 30

def next
  if current_char == "\n"
    @current_line += 1
    @current_column = 0
  else
    @current_column += 1
  end

  @position += 1
end

#peek ⇒ Object 



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# File 'lib/component_embedded_ruby/lexer/input_reader.rb', line 22

def peek
  @input[@position + 1]
end

#peek_behind ⇒ Object 



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# File 'lib/component_embedded_ruby/lexer/input_reader.rb', line 26

def peek_behind
  @input[@position - 1]
end