Re: bitwise operation and type

[Jonathan M Davis]

On Thursday, November 21, 2013 08:21:37 bioinfornatics wrote:
 why this fail http://www.dpaste.dzfl.pl/a6d6acf4
 
 I want to works with ubyte -  
 i do not want use int for manipulating these byte and consume
 more memory as need!

All arithmetic operations on integer types (including bitwise manipulations) 
operate on the original type or (u)int (whichever is larger). So, if you want 
to manipulate a ubyte and then assign the result to a ubyte, you need to cast 
it. It's the same with C/C++ except that C/C++ just silently do the cast for 
you, whereas D requires an explicit cast for narrowing conversions.

- Jonathan M Davis

Re: bitwise operation and type

[Ellery Newcomer]

On 11/20/2013 11:21 PM, bioinfornatics wrote:

why this fail http://www.dpaste.dzfl.pl/a6d6acf4


as with c, most of the integer operators return int for integral types 
smaller than int. also, this is a case where


a += b

does something different than

a = a + b

i guess the former automatically inserts a cast or something.



I want to works with ubyte -  
i do not want use int for manipulating these byte and consume more
memory as need!


tough. use a cast.