rb_sym_intern    1378 internal.h     VALUE rb_sym_intern(const char *ptr, long len, rb_encoding *enc);
rb_sym_intern    1384 internal.h     	rb_sym_intern((ptr), (long)strlen(ptr), (enc)) : \
rb_sym_intern     622 sprintf.c      			sym = rb_sym_intern(start + 1,
rb_sym_intern    1040 symbol.c           return rb_sym_intern(ptr, strlen(ptr), enc);
rb_sym_intern    1046 symbol.c           return rb_sym_intern(ptr, len, rb_usascii_encoding());