ONIGENC_IS_CODE_PRINT  229 include/ruby/encoding.h #define rb_enc_isprint(c,enc) ONIGENC_IS_CODE_PRINT((enc),(c))
ONIGENC_IS_CODE_PRINT 5577 regcomp.c                    ONIGENC_IS_CODE_PRINT(reg->enc, (OnigCodePoint )i))
ONIGENC_IS_CODE_PRINT  370 regerror.c           else if (!ONIGENC_IS_CODE_PRINT(enc, *p) &&