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CSV::Scanner receives a CSV output, scans it and return the content. It also controls the life cycle of the object with its methods keep_start, keep_end, keep_back, keep_drop.

Uses StringScanner (the official strscan gem). Strscan provides lexical scanning operations on a String. We inherit its object and take advantage on the methods. For more information, please visit: ruby-doc.org/stdlib-2.6.1/libdoc/strscan/rdoc/StringScanner.html

Methods
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Class Public methods

new(*args)

Source: show | on GitHub 

# File ruby/lib/csv/parser.rb, line 42
def initialize(*args)
  super
  @keeps = []
end

Instance Public methods

each_line(row_separator)

Source: show | on GitHub 

# File ruby/lib/csv/parser.rb, line 47
def each_line(row_separator)
  position = pos
  rest.each_line(row_separator) do |line|
    position += line.bytesize
    self.pos = position
    yield(line)
  end
end

keep_back()

Source: show | on GitHub 

# File ruby/lib/csv/parser.rb, line 65
def keep_back
  self.pos = @keeps.pop
end

keep_drop()

Source: show | on GitHub 

# File ruby/lib/csv/parser.rb, line 69
def keep_drop
  @keeps.pop
end

keep_end()

Source: show | on GitHub 

# File ruby/lib/csv/parser.rb, line 60
def keep_end
  start = @keeps.pop
  string.byteslice(start, pos - start)
end

keep_start()

Source: show | on GitHub 

# File ruby/lib/csv/parser.rb, line 56
def keep_start
  @keeps.push(pos)
end