Hello, and Happy new year. I'm a bit confused.

uint read()
{
  assert(pos == 68);

  uint value = littleEndianToNative!uint(cast(ubyte[uint.sizeof])buffer[pos..pos+uint.sizeof]);
      pos += uint.sizeof;
      return value;
    }

The above code doesn't work. instead its working perfect when i replace buffer[68..68+uint.sizeof] Any thoughts ?

On Monday, 16 January 2023 at 15:16:46 UTC, aerto wrote:

uint read()
{
  assert(pos == 68);

  uint value = littleEndianToNative!uint(cast(ubyte[uint.sizeof])buffer[pos..pos+uint.sizeof]);
      pos += uint.sizeof;
      return value;
    }

Sorry for the wrong section and the bad title.

On Monday, 16 January 2023 at 15:16:46 UTC, aerto wrote:

What doesn't work?

Can you also give the definitions of the variables and functions involved?

On Monday, 16 January 2023 at 15:35:38 UTC, Dennis wrote:

class iv{
  private byte[] buffer;
  private ulong writePos;
  private ulong readPos;

  this(){}

  void write(T)(T value) if (is(T == uint)){
    buffer ~= nativeToLittleEndian!uint(value);
    writePos += uint.sizeof;
  }

  uint readUint()
  {
    assert(readPos == 0);
    uint value = littleEndianToNative!uint(cast(ubyte[uint.sizeof])buffer[readPos..readPos+uint.sizeof]);
    readPos += uint.sizeof;
    return value;
  }

  uint readUint_test()
  {
    assert(readPos == 0);
    uint value = littleEndianToNative!uint(cast(ubyte[uint.sizeof])buffer[0..0+uint.sizeof]);
    readPos += uint.sizeof;
    return value;
  }
}

void main()
{

  auto cc = new iv();

  uint ptr = 1000000;

  cc.write(ptr);
  writeln(cc.readUint()); //not works
  writeln(cc.readUint_test()); // works

}

The readUint_test its working while the readUint not.

On Monday, 16 January 2023 at 15:49:27 UTC, aerto wrote:

The compiler currently doesn't determine that readPos..readPos+4 has length 4, so it doesn't like the static array cast. You can do this instead:

littleEndianToNative!uint(cast(ubyte[uint.sizeof])buffer[readPos..$][0..uint.sizeof]);

On Monday, 16 January 2023 at 16:30:29 UTC, Dennis wrote:

littleEndianToNative!uint(cast(ubyte[uint.sizeof])buffer[readPos..$][0..uint.sizeof]);

ohh. Thank you very much.