Merge pull request westes#531 from Explorer09/flexint-include

Also check for C++ standard version when deciding to include <stdint.h>

src/flexint_shared.h

@@ -4,6 +4,11 @@
 #define YYFLEX_INTTYPES_DEFINED
 
 /* Prefer C99 integer types if available. */
+
+# if defined(__cplusplus) && __cplusplus >= 201103L
+#include <cstdint>
+#  define YYFLEX_USE_STDINT
+# endif
 # if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
 /* Include <inttypes.h> and not <stdint.h> because Solaris 2.6 has the former
  * and not the latter.
@@ -33,7 +38,11 @@ typedef unsigned short int flex_uint16_t;
 #  ifdef __STDC__
 typedef signed char flex_int8_t;
 /* ISO C only requires at least 16 bits for int. */
+#   ifdef __cplusplus
+#include <climits>
+#   else
 #include <limits.h>
+#   endif
 #   if UINT_MAX >= 4294967295
 #    define YYFLEX_INT32_DEFINED
 typedef int flex_int32_t;