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require "ruby_parser_extras"
require "racc/parser"
##
# RubyParser is a compound parser that uses all known versions to
# attempt to parse.
class RubyParser
VERSIONS = []
attr_accessor :current
def self.for_current_ruby
name = "V#{RUBY_VERSION[/^\d+\.\d+/].delete "."}"
klass = if const_defined? name then
const_get name
else
latest = VERSIONS.first
warn "NOTE: RubyParser::#{name} undefined, using #{latest}."
latest
end
klass.new
end
def self.latest
VERSIONS.first.new
end
def process s, f = "(string)", t = 10
e = nil
VERSIONS.each do |klass|
self.current = parser = klass.new
begin
return parser.process s, f, t
rescue Racc::ParseError, RubyParser::SyntaxError => exc
e ||= exc
end
end
raise e
end
alias :parse :process
def reset
# do nothing
end
class Parser < Racc::Parser
include RubyParserStuff
def self.inherited x
RubyParser::VERSIONS << x
end
def self.version= v
@version = v
end
def self.version
@version ||= Parser > self && self.name[/(?:V|Ruby)(\d+)/, 1].to_i
end
end
class SyntaxError < RuntimeError; end
end
##
# Unfortunately a problem with racc is that it won't let me namespace
# properly, so instead of RubyParser::V25, I still have to generate
# the old Ruby25Parser and shove it in as V25.
require "ruby20_parser"
require "ruby21_parser"
require "ruby22_parser"
require "ruby23_parser"
require "ruby24_parser"
require "ruby25_parser"
require "ruby26_parser"
require "ruby27_parser"
require "ruby30_parser"
require "ruby31_parser"
require "ruby32_parser"
class RubyParser # HACK
VERSIONS.clear # also a HACK caused by racc namespace issues
class V32 < ::Ruby32Parser; end
class V31 < ::Ruby31Parser; end
class V30 < ::Ruby30Parser; end
class V27 < ::Ruby27Parser; end
class V26 < ::Ruby26Parser; end
class V25 < ::Ruby25Parser; end
class V24 < ::Ruby24Parser; end
class V23 < ::Ruby23Parser; end
class V22 < ::Ruby22Parser; end
class V21 < ::Ruby21Parser; end
class V20 < ::Ruby20Parser; end
end
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