summaryrefslogtreecommitdiff
path: root/lib/rdoc/erbio.rb
blob: 42ce895fb39b33721181553dd4533fa5016d115b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
# frozen_string_literal: true
require 'erb'

##
# A subclass of ERB that writes directly to an IO.  Credit to Aaron Patterson
# and Masatoshi SEKI.
#
# To use:
#
#   erbio = RDoc::ERBIO.new '<%= "hello world" %>', nil, nil
#
#   open 'hello.txt', 'w' do |io|
#     erbio.result binding
#   end
#
# Note that binding must enclose the io you wish to output on.

class RDoc::ERBIO < ERB

  ##
  # Defaults +eoutvar+ to 'io', otherwise is identical to ERB's initialize

  def initialize str, safe_level = nil, trim_mode = nil, eoutvar = 'io'
    super
  end

  ##
  # Instructs +compiler+ how to write to +io_variable+

  def set_eoutvar compiler, io_variable
    compiler.put_cmd    = "#{io_variable}.write"
    compiler.insert_cmd = "#{io_variable}.write"
    compiler.pre_cmd    = []
    compiler.post_cmd   = []
  end

end