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Diffstat (limited to 'boost/property_tree/detail/json_parser_write.hpp')
-rw-r--r--boost/property_tree/detail/json_parser_write.hpp7
1 files changed, 4 insertions, 3 deletions
diff --git a/boost/property_tree/detail/json_parser_write.hpp b/boost/property_tree/detail/json_parser_write.hpp
index b52c8ea..78dbfe4 100644
--- a/boost/property_tree/detail/json_parser_write.hpp
+++ b/boost/property_tree/detail/json_parser_write.hpp
@@ -29,11 +29,13 @@ namespace boost { namespace property_tree { namespace json_parser
typename std::basic_string<Ch>::const_iterator e = s.end();
while (b != e)
{
+ typedef typename make_unsigned<Ch>::type UCh;
+ UCh c(*b);
// This assumes an ASCII superset. But so does everything in PTree.
// We escape everything outside ASCII, because this code can't
// handle high unicode characters.
- if (*b == 0x20 || *b == 0x21 || (*b >= 0x23 && *b <= 0x2E) ||
- (*b >= 0x30 && *b <= 0x5B) || (*b >= 0x5D && *b <= 0xFF))
+ if (c == 0x20 || c == 0x21 || (c >= 0x23 && c <= 0x2E) ||
+ (c >= 0x30 && c <= 0x5B) || (c >= 0x5D && c <= 0xFF))
result += *b;
else if (*b == Ch('\b')) result += Ch('\\'), result += Ch('b');
else if (*b == Ch('\f')) result += Ch('\\'), result += Ch('f');
@@ -46,7 +48,6 @@ namespace boost { namespace property_tree { namespace json_parser
else
{
const char *hexdigits = "0123456789ABCDEF";
- typedef typename make_unsigned<Ch>::type UCh;
unsigned long u = (std::min)(static_cast<unsigned long>(
static_cast<UCh>(*b)),
0xFFFFul);