• Jonathan Crapuchettes (11/11) Oct 25 2013 Shouldn't this code work? Looking at the arithmetic conversions section
• =?UTF-8?B?QWxpIMOHZWhyZWxp?= (8/19) Oct 25 2013 But there is 4.0 before 4.1: :)
• Jonathan Crapuchettes (3/28) Oct 25 2013 Thank you for pointing that out for me. I missed that part.

Jonathan Crapuchettes <jcrapuchettes gmail.com> writes:

Shouldn't this code work? Looking at the arithmetic conversions section 
of http://dlang.org/type.html, point 4.1 makes me think that I shouldn't 
be getting the error since they are the same type.

void main()
{
    ushort v1 = 1;
    ushort v2 = 1;
    ushort v3 = v1 + v2;
}

test.d(5): Error: cannot implicitly convert expression (cast(int)v1 + cast
(int)v2) of type int to ushort

=?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:

On 10/25/2013 11:45 AM, Jonathan Crapuchettes wrote:
 Shouldn't this code work? Looking at the arithmetic conversions section
 of http://dlang.org/type.html, point 4.1 makes me think that I shouldn't
 be getting the error since they are the same type.

 void main()
 {
      ushort v1 = 1;
      ushort v2 = 1;
      ushort v3 = v1 + v2;
 }

 test.d(5): Error: cannot implicitly convert expression (cast(int)v1 + cast
 (int)v2) of type int to ushort

But there is 4.0 before 4.1: :)

4. Else the integer promotions are done on each operand, followed by:

    1. If both are the same type, no more conversions are done.

Note "integer promotions are done on each operand". In other words, e.g. 
there is no arithmetic operation on a ushort. The expression v1 + v2 is 
performed as two ints.

Ali

Jonathan Crapuchettes <jcrapuchettes gmail.com> writes:

On Fri, 25 Oct 2013 11:51:03 -0700, Ali Çehreli wrote:

 On 10/25/2013 11:45 AM, Jonathan Crapuchettes wrote:
 Shouldn't this code work? Looking at the arithmetic conversions section
 of http://dlang.org/type.html, point 4.1 makes me think that I
 shouldn't be getting the error since they are the same type.

 void main()
 {
      ushort v1 = 1; ushort v2 = 1; ushort v3 = v1 + v2;
 }

 test.d(5): Error: cannot implicitly convert expression (cast(int)v1 +
 cast (int)v2) of type int to ushort

 But there is 4.0 before 4.1: :)
 
 4. Else the integer promotions are done on each operand, followed by:
 
     1. If both are the same type, no more conversions are done.
 
 Note "integer promotions are done on each operand". In other words, e.g.
 there is no arithmetic operation on a ushort. The expression v1 + v2 is
 performed as two ints.
 
 Ali

Thank you for pointing that out for me. I missed that part.

Jonathan