[C++] Use range-based for loop.

Author: denizevrenci

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/cpp/CppGenerator.java

@@ -1609,9 +1609,9 @@ private void generateJsonEscapedStringGetter(
  "%2$s" +
  indent + " std::ostringstream oss;\n" +
  indent + " std::string s = get%1$sAsString();\n\n" +
- indent + " for (auto c = s.cbegin(); c != s.cend(); c++)\n" +
+ indent + " for (const auto c : s)\n" +
  indent + " {\n" +
- indent + " switch (*c)\n" +
+ indent + " switch (c)\n" +
  indent + " {\n" +
  indent + " case '\"': oss << \"\\\\\\\"\"; break;\n" +
  indent + " case '\\\\': oss << \"\\\\\\\\\"; break;\n" +
@@ -1621,14 +1621,14 @@ private void generateJsonEscapedStringGetter(
  indent + " case '\\r': oss << \"\\\\r\"; break;\n" +
  indent + " case '\\t': oss << \"\\\\t\"; break;\n\n" +
  indent + " default:\n" +
- indent + " if ('\\x00' <= *c && *c <= '\\x1f')\n" +
+ indent + " if ('\\x00' <= c && c <= '\\x1f')\n" +
  indent + " {\n" +
  indent + " oss << \"\\\\u\"" + " << std::hex << std::setw(4)\n" +
- indent + " << std::setfill('0') << (int)(*c);\n" +
+ indent + " << std::setfill('0') << (int)(c);\n" +
  indent + " }\n" +
  indent + " else\n" +
  indent + " {\n" +
- indent + " oss << *c;\n" +
+ indent + " oss << c;\n" +
  indent + " }\n" +
  indent + " }\n" +
  indent + " }\n\n" +