Description

The base class for all your parsers. Use as follows:

require 'parslet'

class MyParser < Parslet::Parser
  rule(:a) { str('a').repeat }
  root(:a)        
end

pp MyParser.new.parse('aaaa')   # => 'aaaa'
pp MyParser.new.parse('bbbb')   # => Parslet::Atoms::ParseFailed: 
                                #    Don't know what to do with bbbb at line 1 char 1.

Parslet::Parser is also a grammar atom. This means that you can mix full fledged parsers freely with small parts of a different parser.

Example:

class ParserA < Parslet::Parser
  root :aaa
  rule(:aaa) { str('a').repeat(3,3) }
end
class ParserB < Parslet::Parser
  root :expression
  rule(:expression) { str('b') >> ParserA.new >> str('b') }
end

In the above example, ParserB would parse something like 'baaab'.