D

D is a programming language created in 2001 by Walter Bright and Andrei Alexandrescu.

The D programming language is an object-oriented, imperative, multi-paradigm system programming language created by Walter Bright of Digital Mars and released in 2001. Bright was joined in the design and development effort in 2007 by Andrei Alexandrescu. Though it originated as a re-engineering of C++, D is a distinct language, having redesigned some core C++ features while also taking inspiration from other languages, notably Java, Python, Ruby, C#, and Eiffel. Read more on Wikipedia...

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the D website
the D Wikipedia page
file extensions for D include d and di
the D team is on Twitter
Check out the 7 D meetup groups on Meetup.com.
There are 243 Project Euler users using D
Explore D snippets on Rosetta Code
D is supported by the GDB
D is listed on HOPL
D ranks #26 in the TIOBE Index
There is an Ubuntu package for D
Here is a D LSP implementation
There is a CodeMirror package for syntax highlighting D
Pygments supports syntax highlighting for D
GitHub supports syntax highlighting for D
D appears in the Quine Relay project
There is a central package repository for D
dlang.org was registered in 2010
See also: FreeBSD, Linux, C, C#, Eiffel, Java, Python, MiniD, Vala, Swift, Genie, Ruby, Assembly language, LLVM IR, CIL, Eclipse, Visual Studio, Emacs, Vim, TextMate, Visual Studio Code, GDB, UTF-8
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Example code from Riju:

import std.stdio;

void main()
{
    writeln("Hello, world!");
}

Example code from hello-world:

#include <stdio.h>
int main() {
   printf("Hello World");
   return 0;
}

Example code from the Hello World Collection:

// Hello World in D

import std.stdio;

void main()
{
   writefln("Hello World!");
}

Example code from Linguist:

unittest
{
}

Example code from Wikipedia:

1 import std.stdio, std.algorithm, std.range, std.string;
 2 
 3 void main()
 4 {
 5     dstring[][dstring] signs2words;
 6 
 7     foreach(dchar[] w; lines(File("words.txt")))
 8     {
 9         w = w.chomp().toLower();
10         immutable key = w.dup.sort().release().idup;
11         signs2words[key] ~= w.idup;
12     }
13 
14     foreach(words; signs2words)
15         if(words.length > 1)
16             writefln(words.join(" "));
17 }

Language features

Feature	Supported	Example	Token
Binary Literals	✓	// 0[Bb][01_]+
Integers	✓	// (0\|[1-9][0-9_]*)([LUu]\|Lu\|LU\|uL\|UL)?
Floats	✓	// 0[xX]([0-9a-fA-F_]*\.[0-9a-fA-F_]+\|[0-9a-fA-F_]+)[pP][+\-]?[0-9_]+[fFL]?[i]?
Hexadecimals	✓	// 0[xX][0-9a-fA-F_]+
Octals	✓	// 0[0-7_]+
Strings	✓	"Hello world"	"
MultiLine Comments	✓	/+ A comment +/	/+ +/
Print() Debugging	✓		printf
Line Comments	✓	// A comment	//
Templates	✓	template TCopy(T) { void copy(out T to, T from) { to = from; } } int i; TCopy!(int).copy(i, 3);
Operator Overloading	✓
Comments	✓
Pointers	✓
Semantic Indentation	ϴ

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