SYSerr.SYSerr

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
template SYSerr(string f, string r)
version(!LIBRESSL_INTERNAL)
extern (C) nothrow @nogc
enum SYSerr = "libressl_d.openssl.err.ERR_PUT_error(libressl_d.openssl.err.ERR_LIB_SYS, " ~ f ~ ", " ~ r ~ ", __FILE__, __LINE__);";

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