Re: single loop copy in D

[psychoticRabbit via Digitalmars-d-learn]

On Friday, 2 March 2018 at 10:08:57 UTC, Simen Kjærås wrote:


This is of course only partly true.

while ((*dst++ = *src++) != 0) {}

works just great, and also better shows what's actually being 
tested for in the loop.


--
  Simen


That's what I was after. Thanks!

Re: single loop copy in D

[Simen Kjærås via Digitalmars-d-learn]

On Friday, 2 March 2018 at 10:01:34 UTC, Jonathan M Davis wrote:
On Friday, March 02, 2018 09:44:20 psychoticRabbit via 
Digitalmars-d-learn wrote:

trying to do this C code, in D, but getting error:
"Error: assignment cannot be used as a condition, perhaps `==`
was meant?"

any help much appreciated:

--
while ((*dst++ = *src++)) {}
--


You can't use = in a while loop's condition like that in D, 
regardless of what you do with parens. You'll need to refactor 
the code so that the assignment is done in the loop's body.


This is of course only partly true.

while ((*dst++ = *src++) != 0) {}

works just great, and also better shows what's actually being 
tested for in the loop.


--
  Simen

Re: single loop copy in D

[Andrea Fontana via Digitalmars-d-learn]

On Friday, 2 March 2018 at 09:44:20 UTC, psychoticRabbit wrote:

trying to do this C code, in D, but getting error:
"Error: assignment cannot be used as a condition, perhaps `==` 
was meant?"


any help much appreciated:

--
while ((*dst++ = *src++)) {}
--


You can't use this syntax inside a while/if/... to prevent 
mistakes due to similarity between assignment syntax (=) and 
comparison syntax (==)


Andrea

Re: single loop copy in D

[Jonathan M Davis via Digitalmars-d-learn]

On Friday, March 02, 2018 09:44:20 psychoticRabbit via Digitalmars-d-learn 
wrote:
> trying to do this C code, in D, but getting error:
> "Error: assignment cannot be used as a condition, perhaps `==`
> was meant?"
>
> any help much appreciated:
>
> --
> while ((*dst++ = *src++)) {}
> --

You can't use = in a while loop's condition like that in D, regardless of
what you do with parens. You'll need to refactor the code so that the
assignment is done in the loop's body.

- Jonathan M Davis

single loop copy in D

[psychoticRabbit via Digitalmars-d-learn]

trying to do this C code, in D, but getting error:
"Error: assignment cannot be used as a condition, perhaps `==` 
was meant?"


any help much appreciated:

--
while ((*dst++ = *src++)) {}
--