Class: Antlr4ruby::CodePointCharStream Abstract

Inherits:
Object
  • Object
show all
Defined in:
lib/antlr4ruby/code_point_char_stream.rb

Overview

This class is abstract.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data, name = UNKNOWN_SOURCE_NAME) ⇒ CodePointCharStream

Returns a new instance of CodePointCharStream.



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 7

def initialize(data, name = UNKNOWN_SOURCE_NAME)
  @data, @name, @position = data, name, 0
end

Class Method Details

.from_buffer(code_point_buffer, name = UNKNOWN_SOURCE_NAME) ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 24

def self.from_buffer(code_point_buffer, name = UNKNOWN_SOURCE_NAME)
  # todo

end

.from_string(input, name = UNKNOWN_SOURCE_NAME) ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 28

def self.from_string(input, name = UNKNOWN_SOURCE_NAME)
  buffer = input.unpack('U*')
  # input.each_char do |c|

  #   buffer.push(c.ord)

  # end

  # 这里会有一个警告，但是不好处理

  CodePointCharStream.new(buffer, name)
end

Instance Method Details

#consume ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 37

def consume
  raise "can not consume eof." if @position == @data.length
  @position += 1
end

#get_source_name ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 78

def get_source_name
  UNKNOWN_SOURCE_NAME if !@name || name.empty?
  @name
end

#get_text(interval) ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 72

def get_text(interval)
  hold = data[interval]
  return hold.pack('U*') if hold
  'error in method get_text'
end

#index ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 42

def index
  @position
end

#la(i) ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 60

def la(i)
  if i < 0
    offset = position + i
    offset < 0 ? IntStream.EOF : data[offset]
  elsif i > 0
    offset = position + i - 1
    offset > data.length ? IntStream.EOF : data[offset]
  else
    0
  end
end

#mark ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 50

def mark
  -1
end

#release(marker) ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 54

def release(marker) end

#seek(index) ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 56

def seek(index)
  @position = index
end

#size ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 46

def size
  @data.length
end

#to_s ⇒ Object 



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# File 'lib/antlr4ruby/code_point_char_stream.rb', line 83

def to_s
  data.pack('U*')
end