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Contents
=begin
Copyright 2006 Suraj N. Kurapati
This file is part of Ruby-VPI.
Ruby-VPI is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
Ruby-VPI is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Ruby-VPI; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
=end
require 'erb'
# Returns an array containing the current ERB buffer and the content that the given block will append to the buffer when it is invoked.
#
# == Example
# Suppose your ERB template invoked a method with some arguments and some content in a block. You can pass the block to this method to obtain the content contained within the block.
#
## template = ERB.new <<-EOS
## <% wrap_xml "message" do %>
## i love ruby!
## <% end %>
## EOS
#
# In this case, the ERB template invokes the _wrap_xml_ method to wrap some content within a pair of XML tags.
#
## def wrap_xml tag, &block
## buffer, content = ERB.buffer_and_content(&block)
## buffer << "<#{tag}>#{content}</#{tag}>"
## end
#
# When we evaluate the template:
## puts template.result(binding)
#
# we see the following output:
## <message>
## i love ruby!
## </message>
#
def ERB.buffer_and_content
raise ArgumentError unless block_given?
# buffer + content
buffer = yield
a = buffer.length
# buffer + content + content
yield
b = buffer.length
# buffer + content
content = buffer.slice! a..b
# buffer
buffer.slice!((-content.length)..-1)
[buffer, content]
end
Version data entries
10 entries across 10 versions & 1 rubygems