How can I convert the following C to D.
I have the following C code, how can I do the same in D.
Info **info;
info = new Info*[hl + 2];
int r;
for(r = 0; r hl; r++)
{
info[r] = new Info[vl + 2];
}
info[r] = NULL;
anon
Re: How can I convert the following C to D.
On Wednesday, 21 January 2015 at 23:59:34 UTC, ketmar via
Digitalmars-d-learn wrote:
On Wed, 21 Jan 2015 23:50:59 +
anon via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com wrote:
On Wednesday, 21 January 2015 at 23:47:46 UTC, ketmar via
Digitalmars-d-learn wrote:
On Wed, 21 Jan 2015 23:44:49 +
anon via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com wrote:
I have the following C code, how can I do the same in D.
Info **info;
info = new Info*[hl + 2];
int r;
for(r = 0; r hl; r++)
{
info[r] = new Info[vl + 2];
}
info[r] = NULL;
anon
this is not C.
Your right its c++
so the answer to your question is very easy: just type in any
gibberish. as C cannot compile C++ code, the final result is to
get the
code that cannot be compiled. any gibberish will do.
Great answer.
Anyway the code isn't mine I just wanted to know how to handle
what the author wrote.
I got it working with.
auto info = new Info[][](hl, vl);
and changing the logic so as not check for the NULL.
No need on being picky it was just a question.
anon
Re: How can I convert the following C to D.
On Wed, 21 Jan 2015 23:50:59 +
anon via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote:
On Wednesday, 21 January 2015 at 23:47:46 UTC, ketmar via
Digitalmars-d-learn wrote:
On Wed, 21 Jan 2015 23:44:49 +
anon via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com wrote:
I have the following C code, how can I do the same in D.
Info **info;
info = new Info*[hl + 2];
int r;
for(r = 0; r hl; r++)
{
info[r] = new Info[vl + 2];
}
info[r] = NULL;
anon
this is not C.
Your right its c++
so the answer to your question is very easy: just type in any
gibberish. as C cannot compile C++ code, the final result is to get the
code that cannot be compiled. any gibberish will do.
signature.asc
Description: PGP signature
Re: How can I convert the following C to D.
anon: I got it working with. auto info = new Info[][](hl, vl); and changing the logic so as not check for the NULL. That's probably a better and simpler translation. I have tried to translate your original code too much literally. Bye, bearophile
Re: How can I convert the following C to D.
anon:
I have the following C code, how can I do the same in D.
Info **info;
info = new Info*[hl + 2];
int r;
for(r = 0; r hl; r++)
{
info[r] = new Info[vl + 2];
}
info[r] = NULL;
I suggest you to ignore ketmar, he's not helping :-)
Is your code initializing info[r+1]?
This is roughly a D translation (untested):
void main() @safe {
import std.stdio;
enum uint hl = 5;
enum uint vl = 7;
static struct Info {}
auto info = new Info[][](hl + 2);
foreach (ref r; info[0 .. hl])
r = new Info[vl + 2];
writefln([\n%(%s,\n%)\n], info);
}
Output:
[
[Info(), Info(), Info(), Info(), Info(), Info(), Info(), Info(),
Info()],
[Info(), Info(), Info(), Info(), Info(), Info(), Info(), Info(),
Info()],
[Info(), Info(), Info(), Info(), Info(), Info(), Info(), Info(),
Info()],
[Info(), Info(), Info(), Info(), Info(), Info(), Info(), Info(),
Info()],
[Info(), Info(), Info(), Info(), Info(), Info(), Info(), Info(),
Info()],
[],
[]
]
Is this what you look for?
Bye,
bearophile
Re: How can I convert the following C to D.
On Wednesday, 21 January 2015 at 23:44:52 UTC, anon wrote:
I have the following C code, how can I do the same in D.
Info **info;
info = new Info*[hl + 2];
int r;
for(r = 0; r hl; r++)
{
info[r] = new Info[vl + 2];
}
info[r] = NULL;
anon
The super-literal translation:
Info** info;
info = new Info*[hl + 2].ptr;
int r;
for(r = 0; r hl; r++)
{
info[r] = new Info[vl + 2].ptr;
}
info[r] = null;
A little more D-ish:
Info[][] info = new Info[][hl + 2];
foreach(r; 0 .. hl)
{
info[r] = new Info[vl + 2];
}
assert(info[hl].length == 0); /* Relying on default
initialization. */
D to the ultimate max:
import std.algorithm;
import std.range;
auto info = iota(hl)
.map!(i = new Info[vl + 2])
.chain(only(Info[].init, Info[].init))
.array;
static assert(is(typeof(info) == Info[][]));
assert(info.length == hl + 2);
assert(info[hl].empty);
And if those +2 are for sentinel values, D doesn't need them
because D arrays know their length. And it all comes down to:
auto info = new Info[][](hl, vl);
Re: How can I convert the following C to D.
On Thursday, 22 January 2015 at 00:16:23 UTC, bearophile wrote:
anon:
I have the following C code, how can I do the same in D.
Info **info;
info = new Info*[hl + 2];
int r;
for(r = 0; r hl; r++)
{
info[r] = new Info[vl + 2];
}
info[r] = NULL;
I suggest you to ignore ketmar, he's not helping :-)
Is your code initializing info[r+1]?
This is roughly a D translation (untested):
void main() @safe {
import std.stdio;
enum uint hl = 5;
enum uint vl = 7;
static struct Info {}
auto info = new Info[][](hl + 2);
foreach (ref r; info[0 .. hl])
r = new Info[vl + 2];
writefln([\n%(%s,\n%)\n], info);
}
Output:
[
[Info(), Info(), Info(), Info(), Info(), Info(), Info(),
Info(), Info()],
[Info(), Info(), Info(), Info(), Info(), Info(), Info(),
Info(), Info()],
[Info(), Info(), Info(), Info(), Info(), Info(), Info(),
Info(), Info()],
[Info(), Info(), Info(), Info(), Info(), Info(), Info(),
Info(), Info()],
[Info(), Info(), Info(), Info(), Info(), Info(), Info(),
Info(), Info()],
[],
[]
]
Is this what you look for?
Bye,
bearophile
Hi Bearophile,
It looks like what I need.
Thanks,
anon
Re: How can I convert the following C to D.
On Wed, 21 Jan 2015 23:44:49 +
anon via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote:
I have the following C code, how can I do the same in D.
Info **info;
info = new Info*[hl + 2];
int r;
for(r = 0; r hl; r++)
{
info[r] = new Info[vl + 2];
}
info[r] = NULL;
anon
this is not C.
signature.asc
Description: PGP signature
Re: How can I convert the following C to D.
On Wednesday, 21 January 2015 at 23:47:46 UTC, ketmar via
Digitalmars-d-learn wrote:
On Wed, 21 Jan 2015 23:44:49 +
anon via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com wrote:
I have the following C code, how can I do the same in D.
Info **info;
info = new Info*[hl + 2];
int r;
for(r = 0; r hl; r++)
{
info[r] = new Info[vl + 2];
}
info[r] = NULL;
anon
this is not C.
Your right its c++
Re: How can I convert the following C to D.
anon: It looks like what I need. But what's the purpose of the last two empty arrays? Bye, bearophile
