415   auto tryRead = [&Stream](char &Dest, size_t size) -> Error {  in ReadSignature()  local
424   if (Error Err = tryRead(Signature[0], 8))  in ReadSignature()
426   if (Error Err = tryRead(Signature[1], 8))  in ReadSignature()
431     if (Error Err = tryRead(Signature[2], 8))  in ReadSignature()
433     if (Error Err = tryRead(Signature[3], 8))  in ReadSignature()
438     if (Error Err = tryRead(Signature[2], 8))  in ReadSignature()
440     if (Error Err = tryRead(Signature[3], 8))  in ReadSignature()
445     if (Error Err = tryRead(Signature[2], 8))  in ReadSignature()
447     if (Error Err = tryRead(Signature[3], 8))  in ReadSignature()
452     if (Error Err = tryRead(Signature[2], 4))  in ReadSignature()
454     if (Error Err = tryRead(Signature[3], 4))  in ReadSignature()
456     if (Error Err = tryRead(Signature[4], 4))  in ReadSignature()
458     if (Error Err = tryRead(Signature[5], 4))  in ReadSignature()