Function Format

library/cpp/yt/string/format-inl.h:1277–1290

template <class... TArgs>
void Format(TStringBuilderBase* builder, TFormatString<TArgs...> format, TArgs&&... args)
{
    // NB(arkady-e1ppa): "if constexpr" is done in order to prevent
    // compiler from emitting "No matching function to call"
    // when arguments are not formattable.
    // Compiler would crash in TFormatString ctor
    // anyway (e.g. program would not compile) but
    // for some reason it does look ahead and emits
    // a second error.
    if constexpr ((CFormattable<TArgs> && ...)) {
        NYT::NDetail::TValueFormatter<0, TArgs...> formatter(args...);
        NYT::NDetail::RunFormatter(builder, format, formatter);
    }
}

template <class... TArgs>
TString Format(TFormatString<TArgs...> format, TArgs&&... args)