Re: Is my T.init elaborate (eg: Not 0)
On Monday, 5 May 2014 at 21:54:33 UTC, Tobias Pankrath wrote: On Monday, 5 May 2014 at 21:51:14 UTC, Tobias Pankrath wrote I'm trying to find the same result, without a runtime check. Anybody know how? I'd write a function that tests the bits of a T.init copy, but reinterpreting is not allowed during CTFE... Foreach member x of Type X of T, check if T.init.x equals X.init? Ah, sorry, didn't read carefully. This is not what you want. Actually, I think you're on to something. I can recursively iterate on all basic types in my T, and check they are all 0 or NULL. Should work. Thanks!
Re: Is it possible to check if a type is an instance of a template?
On 5/6/14, bearophile via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: There is now std.traits.isInstanceOf that could do what you need. Someone resurrected a thread from 2011. Of course there's isInstanceOf when I added it myself at the end of 2012.
Re: Reading a single whitespace-separated word from stdin
Mark Isaacson:
I'm trying my hand at reading from standard input and having
little luck. In particular, I would like to be able to do the
rough equivalent of C++'s:
cin myString;
There isn't always a 1:1 mapping between C++ and D. In D if you
want a single word you usually read the whole line (with a
byLine) and then you use split or splitter to take the single
words.
Something like this (untested):
foreach (line; stdin.byLine) {
immutable words = line.chomp.idup.split;
}
Bye,
bearophile
Re: Reading a single whitespace-separated word from stdin
Fair enough. I've done stuff like that in the past. I'm trying to implement a university project that was originally designed for C++ style I/O... and so where I'd have otherwise jumped at something like that from the beginning, my hands are slightly tied. Suppose I'll make due/not fully comply with the spec.
Re: Reading a single whitespace-separated word from stdin
Mark Isaacson: Fair enough. I've done stuff like that in the past. I'm trying to implement a university project that was originally designed for C++ style I/O... and so where I'd have otherwise jumped at something like that from the beginning, my hands are slightly tied. If you need/want to use the C++ style, even if it's not fully Phobos-idiomatic, probably you can invent some way to simulate it. Bye, bearophile
Re: Reading a single whitespace-separated word from stdin
Indeed. However, doing so looks more painful than redefining my goals. Upon further examination it seems that I had more flexibility than I originally estimated. Besides, the real reason I'm implementing this project is just to practice for when I get to write production D code in a week anyway; I'd rather learn the idioms.
Re: Reading a single whitespace-separated word from stdin
Mark Isaacson: Indeed. However, doing so looks more painful than redefining my goals. Upon further examination it seems that I had more flexibility than I originally estimated. Besides, the real reason I'm implementing this project is just to practice for when I get to write production D code in a week anyway; I'd rather learn the idioms. OK. Once you are done with this little project you can post a link here, I can review the code a little if you want. Bye, bearophile
Re: Implicit static-dynamic arr and modifying
On Mon, 05 May 2014 22:16:58 -0400
Nick Sabalausky via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com wrote:
On 5/5/2014 10:11 PM, Nick Sabalausky wrote:
Is this kinds stuff a sane thing to do, or does it just work by
accident?:
void modify(ubyte[] dynamicArr)
{
dynamicArr[$-1] = 5;
}
void main()
{
ubyte[4] staticArr = [1,1,1,1];
modify(staticArr);
assert(staticArr == [1,1,1,5]);
}
Duh, it's just using a normal slice of the static array...
// Roughly:
dynamicArr.ptr = staticArr;
dynamicArr.length = typeof(staticArr).sizeof;
So all is well, and deliberately so. Pardon the noise.
It's definitely deliberate, though I think that it's a flaw in the language's
design. IMHO, static arrays should never be automatically sliced, but
unfortunately, changing that would break too much code at this point. The
biggest problem is the fact that it's inherently unsafe, though unfortunately,
the compiler currently considers it @safe:
https://issues.dlang.org/show_bug.cgi?id=8838
- Jonathan M Davis
The writeln() function's args can't be [一 ，二]?
Hi,everyone, I find the The writeln() function's args can't be [一 ，二]? why? Thank you. Frank.
Re: The writeln() function's args can't be [一 ，二]?
On Tuesday, 6 May 2014 at 09:43:10 UTC, FrankLike wrote:
Hi,everyone,
I find the The writeln() function's args can't be [一 ，二]?
why?
Thank you.
Frank.
The problem is that you have a wide-character comma (，) there.
This works:
void main() {
writeln([一, 二]);
}
Re: Global variables read at compile time?
I have got same error. I need to pass in instance of class constant, but got error Error: static variable cannot be read at compile http://www.everfall.com/paste/id.php?1mc9mb9cxyie When I had create instance of class in main, and create confvarible above it all worked, but when I had moved it's in module I got error.
Re: Need help with movement from C to D
On Monday, 5 May 2014 at 17:55:37 UTC, Meta wrote: enum offsetof(T, string field) = mixin(type.stringof ~ . ~ field ~ .offsetof); To ensure that a syntactically valid symbol is passed as the type. Interestingly, but this code doesn't compile: enum offsetof(typenfield) = mixin(type.stringof ~ .offsetof); writeln(offsetof!(StrToBob.bob));
Simple matching on a range
Is it a good idea to add a function like this to Phobos?
This is just a first draft of the idea.
void main() {
import std.stdio, std.algorithm, std.range, range_matcher;
auto primes = iota(2, uint.max)
.filter!(x = iota(2, x)
.all!(t = x % t != 0));
auto twinPrimes = primes.rangeMatch!(q{x, x + 2},
q{ [x, x + 2] });
twinPrimes.take(20).writeln;
immutable arr = [1, 2, 1, 3, 5, 3];
// All items of arr that appear twice or more:
arr.rangeMatch!(q{x, $_, x}, q{ x }).writeln;
}
Output:
[[3, 5], [5, 7], [11, 13], [17, 19], [29, 31], [41, 43], [59,
61], [71, 73], [101, 103], [107, 109]]
[1, 3]
rangeMatch takes three arguments, the first is a range of items.
The second is a string that encodes what to match, and the third
is a string that generates the output from the matched data.
So q{x, x + 2} matches any value x followed by x + 2. This is the
definition of twin prime, if the input sequence is of primes.
q{x, $__, x} matches any x, followed by 1 or more other items,
followed by the same x.
$_ means 0 or more.
Bye,
bearophile
Re: Need help with movement from C to D
On Tuesday, 6 May 2014 at 11:09:37 UTC, Andrey wrote: On Monday, 5 May 2014 at 17:55:37 UTC, Meta wrote: enum offsetof(T, string field) = mixin(type.stringof ~ . ~ field ~ .offsetof); To ensure that a syntactically valid symbol is passed as the type. Interestingly, but this code doesn't compile: enum offsetof(typenfield) = mixin(type.stringof ~ .offsetof); writeln(offsetof!(StrToBob.bob)); That's because `StrToBob.bob.stringof` is bob. You can use this instead: import std.traits; enum offsetof(alias typenfield) = mixin(fullyQualifiedName!(typenfield) ~ .offsetof);
Re: Create many objects using threads
On Tuesday, 6 May 2014 at 03:26:52 UTC, Ali Çehreli wrote: On 05/05/2014 04:32 PM, Caslav Sabani wrote: So basically using threads in D for creating multiple instances of class is actually slower. Not at all! That statement can be true only in certain programs. :) Ali But what does exactly means that Garbage Collector blocks? What does it blocks and in which way? And can I use threads to create multiple instance faster or that is just not possible? Thanks
Re: The writeln() function's args can't be [一 ，二]?
The problem is that you have a wide-character comma (，) there.
This works:
void main() {
writeln([一, 二]);
}
No,I mean the execute result is error.That doesn't get the [一,
二],but get the [涓C,浜?].
Why?
Thank you.
Frank.
Re: Global variables read at compile time?
On 05/06/2014 03:16 AM, Suliman wrote:
When I had create instance of class in main, and create confvarible
above it all worked, but when I had moved it's in module I got error.
There is module 'static this()' for such runtime initialization:
Config config;
static this()
{
config = new Config(confname);
if (config.isconfigexists())
writeln(config exist);
else
writeln(config do not exists);
}
void main()
{}
Ali
Re: Need help with movement from C to D
I'm not sure why you'd want to wrap the .offsetof expression in
a template, but it can easily be done like this:
enum offsetOf(alias A, string S) = mixin(A.~S~.offsetof);
Keep in mind that D's offsetof is flawed - if the object does not
contain the requested member, but implicitly converts to another one
that does have such field then the expression compiles, but yields
a bogus value. Eg
struct S { int a, b, c; S2 s2; alias s2 this; }
struct S2 { int d, e; }
static assert(S.e.offsetof==4); // Oops.
artur
Re: Need help with movement from C to D
Artur Skawina:
Keep in mind that D's offsetof is flawed - if the object does
not contain the requested member, but implicitly converts to
another one that does have such field then the expression
compiles, but yields a bogus value. Eg
struct S { int a, b, c; S2 s2; alias s2 this; }
struct S2 { int d, e; }
static assert(S.e.offsetof==4); // Oops.
Is this in Bugzilla?
Bye,
bearophile
Re: Global variables read at compile time?
Thanks! But is there any other solution? I am thinking that I am trying to specify config name by wrong way...
Re: The writeln() function's args can't be [一 ，二]?
On Tuesday, 6 May 2014 at 13:35:57 UTC, FrankLike wrote:
The problem is that you have a wide-character comma (，) there.
This works:
void main() {
writeln([一, 二]);
}
No,I mean the execute result is error.That doesn't get the
[一, 二],but get the [涓C,浜?].
Why?
Thank you.
Frank.
It works for me (Linux). If you're on Windows, it could have
something to do with Windows' handling of Unicode, but I don't
know enough about that to help you. There were posts about this
in this newsgroup, maybe you can find them, or someone else
remembers and can tell you directly...
Re: Need help with movement from C to D
On Tuesday, 6 May 2014 at 14:25:01 UTC, Artur Skawina via Digitalmars-d-learn wrote: I'm not sure why you'd want to wrap the .offsetof expression in a template, but it can easily be done like this: enum offsetOf(alias A, string S) = mixin(A.~S~.offsetof); Great, that's even shorter. Somehow I was fixated on converting the symbol to a string first, but of course the name is directly available in the mixin: enum offsetof(alias typenfield) = mixin(typenfield.offsetof);
Re: The writeln() function's args can't be [一 ，二]?
On Tue, 06 May 2014 15:48:44 +0100, Marc Schütz schue...@gmx.net wrote:
On Tuesday, 6 May 2014 at 13:35:57 UTC, FrankLike wrote:
The problem is that you have a wide-character comma (，) there.
This works:
void main() {
writeln([一, 二]);
}
No,I mean the execute result is error.That doesn't get the [一,
二],but get the [涓C,浜?].
Why?
Thank you.
Frank.
It works for me (Linux). If you're on Windows, it could have something
to do with Windows' handling of Unicode, but I don't know enough about
that to help you. There were posts about this in this newsgroup, maybe
you can find them, or someone else remembers and can tell you directly...
IIRC you need to type chcp 65001 and set the command prompt to the
Lucida font...
R
--
Using Opera's revolutionary email client: http://www.opera.com/mail/
Re: Need help with movement from C to D
On 05/06/14 16:45, via Digitalmars-d-learn wrote: On Tuesday, 6 May 2014 at 14:25:01 UTC, Artur Skawina via Digitalmars-d-learn wrote: I'm not sure why you'd want to wrap the .offsetof expression in a template, but it can easily be done like this: enum offsetOf(alias A, string S) = mixin(A.~S~.offsetof); Great, that's even shorter. Somehow I was fixated on converting the symbol to a string first, but of course the name is directly available in the mixin: enum offsetof(alias typenfield) = mixin(typenfield.offsetof); I didn't realize that worked, but it does. So... enum offsetOf(alias A) = A.offsetof; But I have no idea why anybody would want to wrap this trivial expression like that. And, I have no idea if the, hmm, /unconventional/ D offsetof semantics are in the bugzilla. It's not really a bug, but a design mistake... artur
Re: Need help with movement from C to D
Artur Skawina: And, I have no idea if the, hmm, /unconventional/ D offsetof semantics are in the bugzilla. It's not really a bug, but a design mistake... Design mistakes are valid bugzilla entries. At worst the bad behavior could be documented. But often it's possible to fix the design too, with a small breaking change. Bye, bearophile
Re: Implicit static-dynamic arr and modifying
On Tue, May 06, 2014 at 01:06:14AM -0700, Jonathan M Davis via
Digitalmars-d-learn wrote:
On Mon, 05 May 2014 22:16:58 -0400
Nick Sabalausky via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com wrote:
On 5/5/2014 10:11 PM, Nick Sabalausky wrote:
Is this kinds stuff a sane thing to do, or does it just work by
accident?:
void modify(ubyte[] dynamicArr)
{
dynamicArr[$-1] = 5;
}
void main()
{
ubyte[4] staticArr = [1,1,1,1];
modify(staticArr);
assert(staticArr == [1,1,1,5]);
}
Duh, it's just using a normal slice of the static array...
// Roughly:
dynamicArr.ptr = staticArr;
dynamicArr.length = typeof(staticArr).sizeof;
So all is well, and deliberately so. Pardon the noise.
It's definitely deliberate, though I think that it's a flaw in the
language's design. IMHO, static arrays should never be automatically
sliced, but unfortunately, changing that would break too much code at
this point. The biggest problem is the fact that it's inherently
unsafe, though unfortunately, the compiler currently considers it
@safe:
https://issues.dlang.org/show_bug.cgi?id=8838
[...]
A particularly pernicious instance of this hole is the following:
class C {
int[] data;
this(int[] args...) @safe {
data = args;
}
}
C f() @safe {
return new C(1,2,3);
}
void main() {
import std.stdio;
writeln(f().data); // on my system, writes garbage
}
Exercise for the reader: spot the bug.
T
--
English has the lovely word defenestrate, meaning to execute by
throwing someone out a window, or more recently to remove Windows from
a computer and replace it with something useful. :-) -- John Cowan
Re: Implicit static-dynamic arr and modifying
H. S. Teoh: Exercise for the reader: spot the bug. https://issues.dlang.org/show_bug.cgi?id=5212 https://issues.dlang.org/show_bug.cgi?id=11657 Bye, bearophile
Re: Create many objects using threads
On Monday, 5 May 2014 at 22:11:39 UTC, Ali Çehreli wrote:
On 05/05/2014 02:38 PM, Kapps wrote:
I think that the GC actually blocks when
creating objects, and thus multiple threads creating
instances would not
provide a significant speedup, possibly even a slowdown.
Wow! That is the case. :)
You'd want to benchmark this to be certain it helps.
I did:
import std.range;
import std.parallelism;
class C
{}
void foo()
{
auto c = new C;
}
void main(string[] args)
{
enum totalElements = 10_000_000;
if (args.length 1) {
foreach (i; iota(totalElements).parallel) {
foo();
}
} else {
foreach (i; iota(totalElements)) {
foo();
}
}
}
Typical run on my system for -O -noboundscheck -inline:
$ time ./deneme parallel
real0m4.236s
user0m4.325s
sys 0m9.795s
$ time ./deneme
real0m0.753s
user0m0.748s
sys 0m0.003s
Ali
Huh, that's a much, much, higher impact than I'd expected.
I tried with GDC as well (the one in Debian stable, which is
unfortunately still 2.055...) and got similar results. I also
tried creating only totalCPUs threads and having each of them
create NUM_ELEMENTS / totalCPUs objects rather than risking that
each creation was a task, and it still seems to be the same.
Using malloc and emplace instead of new D, results are about 50%
faster for single-threadeded and ~3-4 times faster for
multi-threaded (4 cpu 8 thread machine, Linux 64-bit). The
multi-threaded version is still twice as slow though. On my
Windows laptop (with the program compiled for 32-bit), it did not
make a significant difference and the multi-threaded version is
still 4 times slower.
That being said, I think most malloc implementations while being
thread-safe, usually use locks or do not scale well.
Code:
import std.range;
import std.parallelism;
import std.datetime;
import std.stdio;
import core.stdc.stdlib;
import std.conv;
class C {}
void foo() {
//auto c = new C;
enum size = __traits(classInstanceSize, C);
void[] mem = malloc(size)[0..size];
emplace!C(mem);
}
void createFoos(size_t count) {
foreach(i; 0 .. count) {
foo();
}
}
void main(string[] args) {
StopWatch sw = StopWatch(AutoStart.yes);
enum totalElements = 10_000_000;
if (args.length = 1) {
foreach (i; iota(totalElements)) {
foo();
}
} else if(args[1] == tasks) {
foreach (i; parallel(iota(totalElements))) {
foo();
}
} else if(args[1] == parallel) {
for(int i = 0; i totalCPUs; i++) {
taskPool.put(task(createFoos, totalElements /
totalCPUs));
}
taskPool.finish(true);
} else
writeln(Unknown argument ', args[1], '.);
sw.stop();
writeln(cast(Duration)sw.peek);
}
Results (Linux 64-bit):
shardsoft:~$ dmd -O -inline -release test.d
shardsoft:~$ ./test
552 ms, 729 μs, and 7 hnsecs
shardsoft:~$ ./test
532 ms, 139 μs, and 5 hnsecs
shardsoft:~$ ./test tasks
1 sec, 171 ms, 126 μs, and 4 hnsecs
shardsoft:~$ ./test tasks
1 sec, 38 ms, 468 μs, and 6 hnsecs
shardsoft:~$ ./test parallel
1 sec, 146 ms, 738 μs, and 2 hnsecs
shardsoft:~$ ./test parallel
1 sec, 268 ms, 195 μs, and 3 hnsecs
Re: Global variables read at compile time?
On 05/06/2014 07:40 AM, Suliman wrote: Thanks! But is there any other solution? I am thinking that I am trying to specify config name by wrong way... Sorry, I don't understand what exactly you are trying to do. :( Is config file a compile-time concept? Do you want to read it at compile time? You can also include the contents of a file at compile-time: import (somefile.d) The compiler will read the file and insert its contents where the import statement appears. On the other hand, if it is available only at run-time, you obviously have to read it at run time. Ali
Re: Create many objects using threads
On Tuesday, 6 May 2014 at 15:56:11 UTC, Kapps wrote:
On Monday, 5 May 2014 at 22:11:39 UTC, Ali Çehreli wrote:
On 05/05/2014 02:38 PM, Kapps wrote:
I think that the GC actually blocks when
creating objects, and thus multiple threads creating
instances would not
provide a significant speedup, possibly even a slowdown.
Wow! That is the case. :)
You'd want to benchmark this to be certain it helps.
I did:
import std.range;
import std.parallelism;
class C
{}
void foo()
{
auto c = new C;
}
void main(string[] args)
{
enum totalElements = 10_000_000;
if (args.length 1) {
foreach (i; iota(totalElements).parallel) {
foo();
}
} else {
foreach (i; iota(totalElements)) {
foo();
}
}
}
Typical run on my system for -O -noboundscheck -inline:
$ time ./deneme parallel
real0m4.236s
user0m4.325s
sys 0m9.795s
$ time ./deneme
real0m0.753s
user0m0.748s
sys 0m0.003s
Ali
Huh, that's a much, much, higher impact than I'd expected.
I tried with GDC as well (the one in Debian stable, which is
unfortunately still 2.055...) and got similar results. I also
tried creating only totalCPUs threads and having each of them
create NUM_ELEMENTS / totalCPUs objects rather than risking
that each creation was a task, and it still seems to be the
same.
snip
I tried with using an allocator that never releases memory,
rounds up to a power of 2, and is lock-free. The results are
quite a bit better.
shardsoft:~$ ./test
1 sec, 47 ms, 474 μs, and 4 hnsecs
shardsoft:~$ ./test
1 sec, 43 ms, 588 μs, and 2 hnsecs
shardsoft:~$ ./test tasks
692 ms, 769 μs, and 8 hnsecs
shardsoft:~$ ./test tasks
692 ms, 686 μs, and 8 hnsecs
shardsoft:~$ ./test parallel
691 ms, 856 μs, and 9 hnsecs
shardsoft:~$ ./test parallel
690 ms, 22 μs, and 3 hnsecs
I get similar results on my laptop (which is much faster than the
results I got on it using DMD's malloc):
test
1 sec, 125 ms, and 847 ╬╝s
test
1 sec, 125 ms, 741 ╬╝s, and 6 hnsecs
test tasks
556 ms, 613 ╬╝s, and 8 hnsecs
test tasks
552 ms and 287 ╬╝s
test parallel
554 ms, 542 ╬╝s, and 6 hnsecs
test parallel
551 ms, 514 ╬╝s, and 9 hnsecs
Code:
http://pastie.org/9146326
Unfortunately it doesn't compile with the ancient version of gdc
available in Debian, so I couldn't test with that. The results
should be quite a bit better since core.atomic would be faster.
And frankly, I'm not sure if the allocator actually works
properly, but it's just for testing purposes anyways.
Re: Global variables read at compile time?
I am tying to hardcode name of config file name. Then I would read and parse it.
Re: Reading a single whitespace-separated word from stdin
An exceptionally generous offer! May take you up on that. Thank you :).
Re: Create many objects using threads
On 05/06/2014 05:46 AM, hardcoremore wrote: But what does exactly means that Garbage Collector blocks? What does it blocks and in which way? I know this much: The current GC that comes in D runtime is a single-threaded GC (aka a stop-the-world GC), meaning that all threads are stopped when the GC is running a garbage collection cycle. And can I use threads to create multiple instance faster or that is just not possible? My example program that did nothing but constructed objects on the GC heap cannot be an indicator of the performance of all multi-threaded programs. In real programs there will be computation-intensive parts; there will be parts blocked on I/O; etc. There is no way of knowing without measuring. Ali
Re: Read Complete File to Array of Lines
I am trying to write simple parser, that split text to
key value
name = david
lastname = wood
here is my code:
foreach (line; readText(confname).splitLines())
{
writeln(line);
foreach (str; split(line, =))
{
writeln(str);
}
}
now it's look like my code are put at str something wrong. I
tried to do writeln(str[0]) but it's put there only first letters
from first row.
Also could anybody help me to find example how create structure
and than fill it's with value field.
Register allocation algorithm
I'm working on small compiler to understand these stuff and maybe
get involved with the D compiler. I wrote a front-end to a C-like
language and now I'm working on the code generator. To be more
specific, in the register allocation phase. I was using a old and
one where I put everything on stack because I thought it could be
too complex for now but then I found something that seems a
beginner like me would implement. From wikipedia articles I was
able to implement below algorithm. I did some search, but it
didn't provide much useful contents to myself, much probably
because I don't have a math background and compiler development
baggage. From what I understood how algorithms works I've
implemented but I have a couple of questions. There's a lot of
people here that knows a lot about compilers. Questions:
Data:
the code generator has only two registers available, they are RO
and R1.
Numbers are 32-bit.
operations: load, push, pop, add, sub, div, mul. They are
x86-like instructions.
I think that's all.
How should I design the get_reg() function?
I was using a stack-based to hold registers, but changed to
current one (very very simple): it does keep the previously
register returned in the function and return the inverse of,
eg, if previously was R0 does return R1 if R1 does return R0.
It does init always with R0 register to result of expression
always be in R0. But if I run out of registers, one register is
pushed on stack and result might don't live in R0. So, how do I
chose the register to result expression always be in it? A
working code example could be very great!
I also want to someone tell me if is correct my
label()/sethiUllman() implementation.
I translated directly this code from C/C++(since post non-D code
one could say it doesn't make much sense) that's the language I'm
using and keep it in the C-way as possible, ie, not using too
much D features because I want to translate it back to my C one
when I get it working. It's because D compiler is written in C++
and then I want to be able read dmd compiler source code, in case
I get involved to, what I really want to.
Thanks in advance.
Here's the code:
http://pastebin.com/vP0XtyVi (pastebin version, in case of found
it's more readable)
import std.stdio;
enum Type {
number,
id,
add,
sub,
mul,
div,
push,
pop,
none
}
enum Reg {
none,
r0,
r1
}
class AST {
AST left;
AST right;
Type type;
Reg reg;
int n;
this(AST l, AST r, Type t) {
left = l;
right = r;
type = t;
n = 0;
}
}
class BinExpression : AST {
this(AST l, AST r, Type t) {
super(l, r, t);
}
}
class Identifier : AST {
string name;
this(string nm) {
super(null, null, Type.id);
name = nm;
}
}
class Number : AST {
int number;
this(int n) {
super(null, null, Type.number);
number = n;
}
}
Reg[] regs = [ Reg.r0, Reg.r1 ];
const int regs_num = regs.sizeof / int.sizeof;
int C = 0;
void main() {
// ((2 + 2) + (2 + 2)) + ((2 + 2) + (2 + 2))
// t1 = 2 + 2
// t2 = 2 + 2
// t3 = t1 + t2
// t4 = 2 + 2
// t5 = 2 + 2
// t6 = t4 + t5
// t7 = t3 + t6
Number a = new Number(2);
Number b = new Number(2);
Number c = new Number(2);
Number d = new Number(2);
Number e = new Number(2);
Number f = new Number(2);
Number g = new Number(2);
Number h = new Number(2);
// t1 = 2 + 2
BinExpression t1 = new BinExpression(a, b, Type.add);
// t2 = 2 + 2
BinExpression t2 = new BinExpression(c, d, Type.add);
// t3 = t1 + t2
BinExpression t3 = new BinExpression(t1, t2, Type.add);
// t4 = 2 + 2
BinExpression t4 = new BinExpression(e, f, Type.add);
// t5 = 2 + 2
BinExpression t5 = new BinExpression(g, h, Type.add);
// t5 = t3 + t4
BinExpression t6 = new BinExpression(t4, t5,Type.add);
BinExpression t7 = new BinExpression(t3, t6, Type.add);
label(t7);
gen(t7);
}
Reg get_reg() {
if(C == regs.sizeof / int.sizeof) {
//writeln(out of registers!);
C = 0;
}
return regs[C++];
}
void gen(AST ast) {
if(ast.left !is null ast.right !is null) {
int l = ast.left.n;
int r = ast.right.n;
if(l = regs_num r = regs_num) {
gen(ast.right);
ast.n -= 1;
//Reg r2 = ast.right.reg;
emit_operation(Type.push, ast.right.reg);
Re: Implicit static-dynamic arr and modifying
On Tuesday, 6 May 2014 at 02:17:06 UTC, Nick Sabalausky wrote:
So all is well, and deliberately so. Pardon the noise.
IMO it's not. I once had a particularly nasty bug because of this:
struct S
{
@safe:
string str;
this(string data)
{
import std.digest.md;
str = md5Of(data).toHexString(); // Oops...
}
}
Atom text editor
FYI: If anyone is using GitHub's text editor Atom and would like basic D syntax highlighting: apm init --package ~/.atom/packages/language-d --convert https://github.com/textmate/d.tmbundle https://atom.io/docs/v0.94.0/converting-a-text-mate-bundle
Re: The writeln() function's args can't be [一 ，二]?
On Tuesday, 6 May 2014 at 15:03:11 UTC, Regan Heath wrote:
On Tue, 06 May 2014 15:48:44 +0100, Marc Schütz
schue...@gmx.net wrote:
On Tuesday, 6 May 2014 at 13:35:57 UTC, FrankLike wrote:
The problem is that you have a wide-character comma (，)
there.
This works:
void main() {
writeln([一, 二]);
}
No,I mean the execute result is error.That doesn't get the
[一, 二],but get the [涓C,浜?].
Why?
Thank you.
Frank.
It works for me (Linux). If you're on Windows, it could have
something to do with Windows' handling of Unicode, but I don't
know enough about that to help you. There were posts about
this in this newsgroup, maybe you can find them, or someone
else remembers and can tell you directly...
IIRC you need to type chcp 65001 and set the command prompt
to the Lucida font...
R
No,it's error.My OS is windows 7,chcp 936. SimpleChinese.
I use the 'go language' to test
'fmt.println(一, 二)'
Then execute result is :一, 二.
It's ok.
But D is error:涓C,浜?.
Why?
Thank you.
Frank.
Re: The writeln() function's args can't be [一 ，二]?
On 05/06/2014 04:56 PM, FrankLike wrote: On Tuesday, 6 May 2014 at 15:03:11 UTC, Regan Heath wrote: IIRC you need to type chcp 65001 and set the command prompt to the Lucida font... R No,it's error.My OS is windows 7,chcp 936. SimpleChinese. I use the 'go language' to test I don't know how go works but code page 936 is not Unicode. D's output on the other hand, is Unicode. 'fmt.println(一, 二)' Then execute result is :一, 二. It's ok. It means that the go program's output is in code page 936. But D is error:涓C,浜?. That is understandable: Since the console is set to 936, it interprets D program's UTF-8 output incorrectly. Please do what Regan Heath says and test again: 1) Set the code page to 65001 2) Use a font that includes your Unicode characters Ali
Re: The writeln() function's args can't be [一 ，二]?
That is understandable: Since the console is set to 936, it interprets D program's UTF-8 output incorrectly. Please do what Regan Heath says and test again: 1) Set the code page to 65001 2) Use a font that includes your Unicode characters Ali Thank you. I modify it by the 'Regedit'(my OS is windows 7 x64): open Regedit, find 'HKEY_CURRENT_USER\Console' find the CodePage,Double Click, then modify the type to 'decimal system',and modify the value to 65001. That's all. Thank you,everyone. Frank.
