60 lines
1.5 KiB
Ruby
60 lines
1.5 KiB
Ruby
module CodeRay
|
|
module Encoders
|
|
|
|
# = Lint Encoder
|
|
#
|
|
# Checks for:
|
|
#
|
|
# - empty tokens
|
|
# - incorrect nesting
|
|
#
|
|
# It will raise an InvalidTokenStream exception when any of the above occurs.
|
|
#
|
|
# See also: Encoders::DebugLint
|
|
class Lint < Debug
|
|
|
|
register_for :lint
|
|
|
|
InvalidTokenStream = Class.new StandardError
|
|
EmptyToken = Class.new InvalidTokenStream
|
|
UnknownTokenKind = Class.new InvalidTokenStream
|
|
IncorrectTokenGroupNesting = Class.new InvalidTokenStream
|
|
|
|
def text_token text, kind
|
|
raise EmptyToken, 'empty token for %p' % [kind] if text.empty?
|
|
raise UnknownTokenKind, 'unknown token kind %p (text was %p)' % [kind, text] unless TokenKinds.has_key? kind
|
|
end
|
|
|
|
def begin_group kind
|
|
@opened << kind
|
|
end
|
|
|
|
def end_group kind
|
|
raise IncorrectTokenGroupNesting, 'We are inside %s, not %p (end_group)' % [@opened.reverse.map(&:inspect).join(' < '), kind] if @opened.last != kind
|
|
@opened.pop
|
|
end
|
|
|
|
def begin_line kind
|
|
@opened << kind
|
|
end
|
|
|
|
def end_line kind
|
|
raise IncorrectTokenGroupNesting, 'We are inside %s, not %p (end_line)' % [@opened.reverse.map(&:inspect).join(' < '), kind] if @opened.last != kind
|
|
@opened.pop
|
|
end
|
|
|
|
protected
|
|
|
|
def setup options
|
|
@opened = []
|
|
end
|
|
|
|
def finish options
|
|
raise 'Some tokens still open at end of token stream: %p' % [@opened] unless @opened.empty?
|
|
end
|
|
|
|
end
|
|
|
|
end
|
|
end
|