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Parslet makes developing complex parsers easy. It does so by
* providing the best <b>error reporting</b> possible
* <b>not generating</b> reams of code for you to debug
Parslet takes the long way around to make <b>your job</b> easier. It allows
for incremental language construction. Often, you start out small,
implementing the atoms of your language first; _parslet_ takes pride in making
this possible.
Eager to try this out? Please see the associated web site:
require 'parslet'
include Parslet
# Constructs a parser using a Parser Expression Grammar like DSL:
parser = str('"') >>
str('\\') >> any |
str('"').absnt? >> any
) >>
# Parse the string and capture parts of the interpretation (:string above)
tree = parser.parse('"This is a \\"String\\" in which you can escape stuff"')
tree # => {:string=>"This is a \\\"String\\\" in which you can escape stuff"}
# Here's how you can grab results from that tree:
transform = do
rule(:string => simple(:x)) {
puts "String contents: #{x}" }
This library should work with most rubies. I've tested it with MRI 1.8
(except 1.8.6), 1.9, rbx-head, jruby. Please report as a bug if you encounter
Note that due to Ruby 1.8 internals, Unicode parsing is not supported on that
At version 1.2.1 - See HISTORY.txt for changes.
(c) 2010 Kaspar Schiess
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