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author | Kornelius Kalnbach <murphy@rubychan.de> | 2013-07-14 02:49:16 +0200 |
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committer | Kornelius Kalnbach <murphy@rubychan.de> | 2013-07-14 02:49:16 +0200 |
commit | bf395bd14ed7f63aab84955f6768f59965e3a73e (patch) | |
tree | 870e3ee4980401f43c2dc9a34d2e8343ef3a20ca /lib/coderay/encoders/lint.rb | |
parent | ffe0c90999c0b7255a5dfc608c84e683440475b1 (diff) | |
parent | 7493dcbfded42686169027a158c18c5312a3af24 (diff) | |
download | coderay-bf395bd14ed7f63aab84955f6768f59965e3a73e.tar.gz |
Merge branch 'master' into cleanup-output
Diffstat (limited to 'lib/coderay/encoders/lint.rb')
-rw-r--r-- | lib/coderay/encoders/lint.rb | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/lib/coderay/encoders/lint.rb b/lib/coderay/encoders/lint.rb new file mode 100644 index 0000000..4601e90 --- /dev/null +++ b/lib/coderay/encoders/lint.rb @@ -0,0 +1,57 @@ +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 + IncorrectTokenGroupNesting = Class.new InvalidTokenStream + + def text_token text, kind + raise EmptyToken, 'empty token' if text.empty? + 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 |