Experimental scanner: keep track of which strings / identifiers contain an escape.

tools/lexer_generator/code_generator.jinja

 // 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 95 matching lines @@
     }
   {% elif type == 'store_harmony_token_and_goto' %}
     if (harmony_{{value[0]}}_) {
       stored_token = Token::{{value[1]}};
     } else {
       stored_token = Token::{{value[2]}};
     }
     goto code_after_entry_{{value[3]}};
   {% elif type == 'set_marker' %}
     marker_ = cursor_ - {{value}};
+  {% elif type == 'set_has_escapes' %}
+    next_.has_escapes = true;
   {% else %}
     uncompilable code for {{type}}
   {% endif -%}
 {%- endmacro -%}
 
 
 {%- macro long_char_check() -%}
   {%- if encoding == 'utf16'-%}
     primary_char > {{upper_bound}}
   {%- elif encoding == 'utf8'-%}
@@ skipping 153 matching lines @@
 }
 
 #define SKIP() {                      \
   start_ = cursor_;                   \
 }
 
 namespace v8 {
 namespace internal {
 template<>
 void ExperimentalScanner<{{char_type}}>::Scan() {
+  next_.has_escapes = false;
   // Setup environment.
   Token::Value stored_token;
   {{char_type}} primary_char;
   if (cursor_ >= buffer_end_) primary_char = 0;
   else primary_char = *(cursor_);
 
 {# first node is start node #}
 {% for dfa_state in dfa_states -%}
   {%- set inline = dfa_state['inline'] -%}
   {%- if not inline %}
@@ skipping 12 matching lines @@
   FORWARD();
   goto code_start;
 
   fell_through:
   ((void(*)())0)(); // crash
   // force use of stored_token
   stored_token = Token::ILLEGAL;
 }
 } }