Phobos is the official runtime and standard library of the D programming language.
Questions tagged [phobos]
97 questions
2
votes
1 answer
std.regex.regex() not pure. Why?
In D std.regex.regex() is not pure:
import std.regex;
pure void test() // test.d(5): Error: pure function 'test' cannot call impure function 'regex'
{
auto r = regex(r"patern123", "g");
}
Why?
Is it
A. Not enough pure keywords were thrown…
dnsmkl
- 792
- 5
- 17
2
votes
2 answers
Read data from a webpage in D?
how to simply open an url and read the data from a webpage with D?
(I prefer phobos over tango, if needing to use standard lib functionality)
Samuel Lampa
- 4,336
- 5
- 42
- 63
2
votes
1 answer
What is the reasoning behind the design of std.complex?
unittest
{
immutable float a = 1.1, b = 1.2;
auto c1 = complex(a,b);
auto r1 = c1 + c1; // error, not mutable
}
Which means that I can have Complex!(immutable float), but I can never use its opBinary functions against another instance of…
Arlen
- 6,641
- 4
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- 61
1
vote
0 answers
Adding a custom type to a RedBlackTree
I want to keep an ordered set of records and the standard provides me with RedBlackTree. The record is of type Tuple!(string, uint). Here's what it looks like:
import std.json : parseJSON;
uint[string] wordTable;
import…
noconst
- 639
- 4
- 15
1
vote
1 answer
how to check for array or range length being at least N in Dlang
For N=1, I would use std.array : empty to check for length being at least N, and avoid having to go through the whole input.
For N>1 (or all N), what is the idiomatic way in D language?
I've tried to use the std.range : take which "Lazily takes only…
V-R
- 1,309
- 16
- 32
1
vote
1 answer
Using std.algorithm.iteration.sum with Duration[]
Why I can't use std.algorithm.iteration.sum with Duration[] ?
I thought I can use the sum in the same way than e.g. with int[]:
int[] ints = [40, 27, 5];
int intSum = ints.sum();
assert(intSum == 72);
But instead I get an unexpected (unexpected for…
user272735
- 10,473
- 9
- 65
- 96
1
vote
2 answers
Get the variable values at runtime using reflection in Dlang
Is it possible to get the class/struct/other variables value during runtime in dlang to get/set its value? If yes how to do that please provide example.
And also is it possible to get the runtime variable value?
Ex:
class S{ int svariable =…
Hakuna Matata
- 755
- 3
- 13
1
vote
4 answers
Is there an equivalent for Glob in D Phobos?
In python I can use glob to search path patterns. This for instance:
import glob
for entry in glob.glob("/usr/*/python*"):
print(entry)
Would print…
Matthew Jones
- 372
- 2
- 11
1
vote
1 answer
A class that can parse IP domain (e.g. 192.168.0.0/16)
I am writing a simple script in D that needs to interface with command-line network programs that use IP domain addresses (e.g. 10.0.14.0/24).
Is there any ready parser existing for that in D?
Something, that can validate a domain and break it into…
Adam Ryczkowski
- 7,592
- 13
- 42
- 68
1
vote
1 answer
try to install Tango+D2 but compile with error symbol undefined (Window)
I try to use Tango and Phobo together in D2 and I downloaded the package from link and follow its installation process.
But it has only Linux installation but not windows.
This is what I do.
Visual-D and DMD already installed. link
I save the file…
Hami
- 335
- 1
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- 22
1
vote
1 answer
Odd behaviour from Array in BinaryHeap
I have a tree-like structure using Node objects with references to other Node objects. Node is a class. Now, one of the routines I'm writing needs a minimum priority queue, which I'm implementing using std.container.BinaryHeap and…
Koz Ross
- 3,040
- 2
- 24
- 44
1
vote
1 answer
Cartesian product of immutable ranges
Why can't we compute the cartesian product of two immutable ranges ?
The following code :
import std.stdio;
import std.algorithm;
void main() {
immutable int[] B = [ 1, 2, 3 ];
immutable int[] C = [ 4, 5, 6 ];
auto BC =…
matovitch
- 1,264
- 11
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1
vote
1 answer
D Socket Programming Basic Connection Script
I am brand new to D programming so please excuse my ignorance. I am trying to create a basic program to connect to a website and download a page or connect to a restful API and download info. Right now all I need to worry about is TCP (streams). I'm…
user2395126
- 526
- 1
- 7
- 20
1
vote
2 answers
Attempt string-to-real conversion in D without exceptions
Given an array of string, I want to find the first one that can be successfully converted to a real without using exceptions.
The only relevant functions I can see in Phobos are std.conv.to and std.conv.parse, but both of these will throw an…
Peter Alexander
- 53,344
- 14
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1
vote
2 answers
Segfault in D for too large inputs
The following D program crashes for input 939971 or higher, but not for input 939970 or lower:
#!/usr/bin/rdmd --shebang -w -d-debug --relocation-model=pic
import std.stdio;
import std.bigint;
import std.conv;
import std.array;
//extern (C) void…
Demi
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