ENCODING_MASK      28 debug.c                RUBY_ENCODING_MASK  = ENCODING_MASK,
ENCODING_MASK      23 include/ruby/encoding.h     RBASIC(obj)->flags &= ~ENCODING_MASK;\
ENCODING_MASK      35 include/ruby/encoding.h #define ENCODING_GET_INLINED(obj) ((RBASIC(obj)->flags & ENCODING_MASK)>>ENCODING_SHIFT)