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# coding: utf-8
module Rsec #:nodoc:
# parser base
module Parser
# parses string<br/>
# returns nil if unparsed
def parse str, source_name='source'
ctx = ParseContext.new str, source_name
_parse ctx
end
# almost the same as parse<br/>
# but raises SyntaxError
def parse! str, source_name='source'
ctx = ParseContext.new str, source_name
ret = _parse ctx
if INVALID[ret]
raise ctx.generate_error source_name
end
ret
end
attr_accessor :name
def inspect
# TODO move
@name ||= self.class.to_s[/\w+$/]
case self
when Lazy
"<#{name}>"
when Binary
"<#{name} #{left.inspect} #{right.inspect}>"
when Seq, Seq_, Branch
# don't use redefined map!
res = []
each{|e| res << e.inspect}
"<#{name} #{res.join ' '}>"
when Unary
"<#{name} #{some.inspect}>"
else
"<#{name}>"
end
end
end
# parsers with 2 params base
Binary = Struct.new :left, :right
class Binary
include Parser
end
# parsers with 1 param base
Unary = Struct.new :some
class Unary
include Parser
end
end
require "rsec/parsers/misc"
require "rsec/parsers/seq"
require "rsec/parsers/prim"
require "rsec/parsers/join"
require "rsec/parsers/repeat"
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