• Charles Hixson via Digitalmars-d-learn (17/17) Mar 25 2016 I've got a simple struct:
• Adam D. Ruppe (3/4) Mar 25 2016 rawWrite takes a generic array of anything... you should be able
• Charles Hixson via Digitalmars-d-learn (3/7) Mar 25 2016 Thanks, that compiled. It's running a test now...and I'm leaving it for...
• Charles Hixson via Digitalmars-d-learn (4/13) Mar 26 2016 OK, after removing a few bugs, preliminary checks say that this works

Charles Hixson via Digitalmars-d-learn writes:

I've got a simple struct:
struct    Chnk
{  ulong        id;
     char[20]    wrd;
     ubyte        length;

    ...    <--various utility functions and constructors
}
That I'm trying to write to a file.  I want to use an unformatted 
read/write because I want this to be a random access file.

But when I try to cast a Chnk to a ubyte[], I get an error, and when I 
try to to!ubyte[] it I get a slightly different error:: Error: template 
instance isRawStaticArray!() does not match template declaration 
isRawStaticArray(T, A...)

I don't want to copy it twice each time I read or write it, as I would 
if, e.g., I used OutBuffer.  How should I approach this?  Do I need to 
use fread/fwrite?  I'm sure I used to be able to pass a pointer and 
length, but I can't find that option anymore.

Adam D. Ruppe <destructionator gmail.com> writes:

On Friday, 25 March 2016 at 18:25:28 UTC, Charles Hixson wrote:
 But when I try to cast a Chnk to a ubyte[], I get an error, and

rawWrite takes a generic array of anything... you should be able 
to rawWrite((&your_object)[0 .. 1])

Charles Hixson via Digitalmars-d-learn writes:

On 03/25/2016 11:32 AM, Adam D. Ruppe via Digitalmars-d-learn wrote:
 On Friday, 25 March 2016 at 18:25:28 UTC, Charles Hixson wrote:
 But when I try to cast a Chnk to a ubyte[], I get an error, and

 rawWrite takes a generic array of anything... you should be able to 
 rawWrite((&your_object)[0 .. 1])

Thanks, that compiled.  It's running a test now...and I'm leaving it for 
a few hours.

Charles Hixson via Digitalmars-d-learn writes:

OK, after removing a few bugs, preliminary checks say that this works 
perfectly.
Thanks again, as I never would have even considered that approach.

On 03/25/2016 12:24 PM, Charles Hixson via Digitalmars-d-learn wrote:
 On 03/25/2016 11:32 AM, Adam D. Ruppe via Digitalmars-d-learn wrote:
 On Friday, 25 March 2016 at 18:25:28 UTC, Charles Hixson wrote:
 But when I try to cast a Chnk to a ubyte[], I get an error, and

 rawWrite takes a generic array of anything... you should be able to 
 rawWrite((&your_object)[0 .. 1])

 Thanks, that compiled.  It's running a test now...and I'm leaving it 
 for a few hours.