Experimental lexer generator: Fix html comments.

src/lexer/lexer_py.re

 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 45 matching lines @@
 
 "==="         <|push_token(EQ_STRICT)|>
 "=="          <|push_token(EQ)|>
 "="           <|push_token(ASSIGN)|>
 "!=="         <|push_token(NE_STRICT)|>
 "!="          <|push_token(NE)|>
 "!"           <|push_token(NOT)|>
 
 "//"          <||SingleLineComment>
 "/*"          <||MultiLineComment>
-"<!--"        <||HtmlComment>
+"<!--"        <||SingleLineComment>
+
+"<!-"        <|{
+  cursor_ -= 2;
+  yych = *(cursor_);
+  PUSH_TOKEN(Token::LT);
+  yych = *(++cursor_);
+  PUSH_TOKEN(Token::NOT);
+  yych = *(++cursor_);
+  PUSH_TOKEN(Token::SUB);
+}|>
+
+"<!"        <|{
+  cursor_ -= 1;
+  yych = *(cursor_);
+  PUSH_TOKEN(Token::LT);
+  yych = *(++cursor_);
+  PUSH_TOKEN(Token::NOT);
+}|>
+
 
 "-->" <{
   if (!just_seen_line_terminator_) {
+    yych = *(--cursor_);
     PUSH_TOKEN(Token::DEC);
-    start_ = cursor_ - 1;
     goto code_start;
   }
 }||SingleLineComment>
 
 ">>>="        <|push_token(ASSIGN_SHR)|>
 ">>>"         <|push_token(SHR)|>
 "<<="         <|push_token(ASSIGN_SHL)|>
 ">>="         <|push_token(ASSIGN_SAR)|>
 "<="          <|push_token(LTE)|>
 ">="          <|push_token(GTE)|>
@@ skipping 125 matching lines @@
 <<SingleLineComment>>
 line_terminator  <|push_line_terminator|>
 eof <|skip_and_terminate|>
 catch_all <||continue>
 
 <<MultiLineComment>>
 "*/"             <|skip|>
 # TODO find a way to generate the below rule
 /\*[^\/]/        <||continue>
 line_terminator  <push_line_terminator||continue>
+eof <|skip_and_terminate|>
 catch_all        <||continue>
-
-<<HtmlComment>>
-"-->"            <|skip|>
-# TODO find a way to generate the below rules
-/--./            <||continue>
-/-./             <||continue>
-line_terminator  <push_line_terminator||continue>
-catch_all <||continue>