introduced true block and EOL comments

* The previous convention of !* ... *! are now true block comments,
  i.e. they are parsed faster, don't spam the goto table and allow
  embedding of exclamation marks - only "*!" terminates the comment.
* It is therefore now forbidden to have goto labels beginning with "*".
* Also support "!!" to introduce EOL comments (like C++'s //).
  This disallows empty labels, but they weren't useful anyway.
  This is the shortest way to begin a comment.
* All comment labels have been converted to true comments, to ensure
  that syntax highlighting works correctly.
  EOL comments are used for single line commented-out code, since it's
  easiest to uncomment - you don't have to jump to the line end.
  This is a pure convention / coding style.
  Other people might do it differently.
* It's of course still possible to abuse goto labels as comments
  as TECO did for ages.
* In lexing / syntax highlighting, labels and comments are highlighted differently.
* When syntax highlighting, a single "!" will first be highlighted as a label
  since it's not yet unambiguous. Once you type the second character (* or !),
  the first character is retroactively styled as a comment as well.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/lexers/cpp.tes b/lib/lexers/cpp.tes
index 5c3ce4a..0f6a01a 100644
--- a/lib/lexers/cpp.tes
+++ b/lib/lexers/cpp.tes
@@ -12,7 +12,7 @@
   :EN*.hppQ*"S -1 '
   :EN*.hxxQ*"S -1 '
   :EN*.ippQ*"S -1 '
-  !*:EN*.mmQ*"S -1 '*!
+  !!:EN*.mmQ*"S -1 '
   :EN*.smaQ*"S -1 '
   :EN*.inoQ*
 }
@@ -25,7 +25,7 @@
     explicit export friend mutable namespace new not not_eq operator or or_eq
     private protected public reinterpret_cast static_cast template this
     throw try typeid typename using virtual xor xor_eq
-  ! Doxygen keywords !
+  !* Doxygen keywords *!
   2ESSETKEYWORDSQ[lexer.c.doxygenkeywords]
   :M[color.comment],1M[color.set]
   :M[color.comment],2M[color.set]