partial cleanup of continuation handling in lexer * lex.h, lex.ll (octave_lexer::handle_continuation): New function. (octave_lexer::finish_comment): Move to octave_lexer::finish_comment. Don't return token. New argument, looking_at_continuation. If not handling continuation, unput newline character. (^{S}*{CCHAR}\{{S}*{NL}): Call yyless before finishing comment. (^{S}*{CCHAR}\{{S}*{NL}, <BLOCK_COMMENT_START>^{S}*{CCHAR}\{{S}*{NL}, <LINE_COMMENT_START>{ANY_INCLUDING_NL}, <LINE_COMMENT_START>{S}*{CCHAR}.*{NL}): Don't return token. (<LINE_COMMENT_START>{S}*{CCHAR}.*{NL}): Don't give COMMAND_START start state special treatment. ({CONT}{S}*{NL}|{CONT}{S}*{COMMENT}): Call octave_lexer::handle_continuation.

--- a/libinterp/parse-tree/lex.h
+++ b/libinterp/parse-tree/lex.h
@@ -253,8 +253,6 @@
 
   void reset (void);
 
-  int finish_comment (octave_comment_elt::comment_type typ);
-
   // true means that we have encountered eof on the input stream.
   bool end_of_input;
 
@@ -496,6 +494,11 @@
 
   void handle_number (void);
 
+  void handle_continuation (void);
+
+  void finish_comment (octave_comment_elt::comment_type typ,
+                       bool looking_at_continuation = false);
+
   bool have_continuation (bool trailing_comments_ok = true);
 
   bool have_ellipsis_continuation (bool trailing_comments_ok = true);