rb_enc_symname_type  285 symbol.c       		type = rb_enc_symname_type(name, len-1, enc, allowed_attrset);
rb_enc_symname_type  313 symbol.c           return rb_enc_symname_type(name, len, enc, IDSET_ATTRSET_FOR_SYNTAX) != -1;
rb_enc_symname_type  321 symbol.c           int type = rb_enc_symname_type(ptr, len, rb_enc_get(name), allowed_attrset);