Experimental push model parser: Regexp fix.

src/lexer/lexer.re

 #include <fcntl.h>
 #include <stdio.h>
 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
 
 // TODO:
 // - SpiderMonkey compatibility hack: "  --> something" is treated
 //   as a single line comment.
 // - An identifier cannot start immediately after a number.
@@ skipping 151 matching lines @@
     /*!re2c
     re2c:indent:top   = 1;
     re2c:yych:conversion = 0;
     re2c:condenumprefix     = kCondition;
     re2c:define:YYCONDTYPE    = Condition;
 
     eof = "\000";
     any = [\000-\377];
     whitespace_char = [ \t\v\f\r];
     whitespace = whitespace_char+;
-    identifier_start_ = [$_\\a-zA-z];
-    identifier_char = [$_\\a-zA-z0-9];
+    identifier_start_ = [$_\\a-zA-Z];
+    identifier_char = [$_\\a-zA-Z0-9];
     line_terminator = [\n\r]+;
     digit = [0-9];
     hex_digit = [0-9a-fA-F];
     maybe_exponent = ('e' [-+]? digit+)?;
 
     <Normal> "break"       { PUSH_TOKEN(Token::BREAK); }
     <Normal> "case"        { PUSH_TOKEN(Token::CASE); }
     <Normal> "catch"       { PUSH_TOKEN(Token::CATCH); }
     <Normal> "class"       { PUSH_TOKEN(Token::FUTURE_RESERVED_WORD); }
     <Normal> "const"       { PUSH_TOKEN(Token::CONST); }
@@ skipping 227 matching lines @@
 }
 
 
 void ExperimentalScanner::Record(Token::Value token, int beg, int end) {
   if (token == Token::EOS) end--;
   token_[fetched_] = token;
   beg_[fetched_] = beg;
   end_[fetched_] = end;
   fetched_++;
 }