Function getFileSize

src/IO/WithFileSize.cpp:34–40

template <typename T>
static size_t getFileSize(T & in)
{
    if (auto maybe_size = tryGetFileSize(in))
        return *maybe_size;

    throw Exception(ErrorCodes::UNKNOWN_FILE_SIZE, "Cannot find out file size");
}

std::optional<size_t> tryGetFileSizeFromReadBuffer(ReadBuffer & in)
{