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module CodeRay
module Encoders
# = Debug Lint Encoder
#
# Debug encoder with additional checks for:
#
# - empty tokens
# - incorrect nesting
#
# It will raise an InvalidTokenStream exception when any of the above occurs.
#
# See also: Encoders::Debug
class DebugLint < Debug
register_for :debug_lint
InvalidTokenStream = Class.new StandardError
EmptyToken = Class.new InvalidTokenStream
IncorrectTokenGroupNesting = Class.new InvalidTokenStream
def initialize options = {}
super
@opened = []
end
def text_token text, kind
raise EmptyToken, 'empty token' if text.empty?
super
end
def begin_group kind
@opened << kind
super
end
def end_group kind
raise IncorrectTokenGroupNesting, "We are inside #{@opened.inspect}, not #{kind}" if @opened.pop != kind
super
end
def begin_line kind
@opened << kind
super
end
def end_line kind
raise IncorrectTokenGroupNesting, "We are inside #{@opened.inspect}, not #{kind}" if @opened.pop != kind
super
end
end
end
end
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