class CSV::Parser::Scanner

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: docs.ruby-lang.org/en/master/StringScanner.html

Public Class Methods

new (*args)

Source

# File lib/csv/parser.rb, line 55
def initialize(*args)
  super
  @keeps = []
end

Calls superclass method

Public Instance Methods

each_line (row_separator) { |line| ... }

Source

# File lib/csv/parser.rb, line 60
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

# File lib/csv/parser.rb, line 78
def keep_back
  self.pos = @keeps.pop
end

keep_drop ()

Source

# File lib/csv/parser.rb, line 82
def keep_drop
  @keeps.pop
end

keep_end ()

Source

# File lib/csv/parser.rb, line 73
def keep_end
  start = @keeps.pop
  string.byteslice(start, pos - start)
end

keep_start ()

Source

# File lib/csv/parser.rb, line 69
def keep_start
  @keeps.push(pos)
end