+ DW_LANG_Haskell = 0x0018, /* Haskell */
+ DW_LANG_C_plus_plus_11 = 0x001a, /* ISO C++:2011 */
+ DW_LANG_C11 = 0x001d, /* ISO C:2011 */
+ DW_LANG_C_plus_plus_14 = 0x0021, /* ISO C++:2014 */
+ DW_LANG_Fortran03 = 0x0022, /* ISO/IEC 1539-1:2004 */
+ DW_LANG_Fortran08 = 0x0023, /* ISO/IEC 1539-1:2010 */
+