Method: PrettyPrint#initialize

Defined in:

lib/prettyprint.rb

#initialize(output = ''.dup, maxwidth = 79, newline = "\n", &genspace) ⇒ PrettyPrint

Creates a buffer for pretty printing.

output is an output target. If it is not specified, ” is assumed. It should have a << method which accepts the first argument obj of PrettyPrint#text, the first argument sep of PrettyPrint#breakable, the first argument newline of PrettyPrint.new, and the result of a given block for PrettyPrint.new.

maxwidth specifies maximum line length. If it is not specified, 79 is assumed. However actual outputs may overflow maxwidth if long non-breakable texts are provided.

newline is used for line breaks. “\n” is used if it is not specified.

The block is used to generate spaces. {|width| ‘ ’ * width} is used if it is not given.

# File 'lib/prettyprint.rb', line 84

def initialize(output=''.dup, maxwidth=79, newline="\n", &genspace)
  @output = output
  @maxwidth = maxwidth
  @newline = newline
  @genspace = genspace || lambda {|n| ' ' * n}

  @output_width = 0
  @buffer_width = 0
  @buffer = []

  root_group = Group.new(0)
  @group_stack = [root_group]
  @group_queue = GroupQueue.new(root_group)
  @indent = 0
end