class Sass::Deprecation

warning, and ‘warn` should be called each time a warning is needed.
A global Deprecation instance should be created for each type of deprecation
given file.
A deprecation warning that should only be printed once for a given line in a

def self.allow_double_warnings

are allowed.
Runs a block in which double deprecation warnings for the same location 
def self.allow_double_warnings
  old_allow_double_warnings = @@allow_double_warnings
  @@allow_double_warnings = true
  yield
ensure
  @@allow_double_warnings = old_allow_double_warnings
end

def initialize 

def initialize
  # A set of filename, line pairs for which warnings have been emitted.
  @seen = Set.new
end

def warn(filename, line, column_or_message, message = nil)

Parameters:
  • message (String) --
  • column (Number) --
  • line (Number) --
  • filename (String, nil) --
  • message (String) --
  • line (Number) --
  • filename (String, nil) --

Overloads:
  • warn(filename, line, column, message)
  • warn(filename, line, message) 
def warn(filename, line, column_or_message, message = nil)
  return if !@@allow_double_warnings && @seen.add?([filename, line]).nil?
  if message
    column = column_or_message
  else
    message = column_or_message
  end
  location = "line #{line}"
  location << ", column #{column}" if column
  location << " of #{filename}" if filename
  Sass::Util.sass_warn("DEPRECATION WARNING on #{location}:\n#{message}")
end