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2009年2月12日星期四

D Programming Language 2.0

"It seems to me that most of the "new" programming languages fall into one of two categories: Those from academia with radical new paradigms and those from large corporations with a focus on RAD and the web. Maybe it's time for a new language born out of practical experience implementing compilers." -- Michael

"Great, just what I need.. another D in programming." -- Segfault

The D book Learn to Tango with D by Kris Bell, Lars Ivar Igesund, Sean Kelly and Michael Parker is now out.

The first D Programming Language Conference took place in Seattle at Amazon, Aug 23..24, 2007.

D is a systems programming language. Its focus is on combining the power and high performance of C and C++ with the programmer productivity of modern languages like Ruby and Python. Special attention is given to the needs of quality assurance, documentation, management, portability and reliability.

The D language is statically typed and compiles directly to machine code. It's multiparadigm, supporting many programming styles: imperative, object oriented, and metaprogramming. It's a member of the C syntax family, and its appearance is very similar to that of C++. Here's a quick list of features.

It is not governed by a corporate agenda or any overarching theory of programming. The needs and contributions of the D programming community form the direction it goes.

There are currently two implementations, the dmd package for Windows and x86 Linux, and the GCC D Compiler package for several platforms, including Windows and Mac OS X.

A large and growing collection of D source code and projects are at dsource. More links to innumerable D wikis, libraries, tools, media articles, etc. are at dlinks.

This document is available as a pdf, as well as in Japanese and Portugese translations. A German book Programming in D: Introduction to the new Programming Language is available, as well as a Japanese book D Language Perfect Guide.

This is an example D program illustrating some of the capabilities:

#!/usr/bin/dmd -run /* sh style script syntax is supported */  /* Hello World in D    To compile:      dmd hello.d    or to optimize:      dmd -O -inline -release hello.d */  import std.stdio;  void main(string[] args) {     writefln("Hello World, Reloaded");      // auto type inference and built-in foreach     foreach (argc, argv; args)     {         // Object Oriented Programming         auto cl = new CmdLin(argc, argv);         // Improved typesafe printf         writeln(cl.argnum, cl.suffix, " arg: ", cl.argv);         // Automatic or explicit memory management         delete cl;     }      // Nested structs and classes     struct specs     {         // all members automatically initialized         int count, allocated;     }      // Nested functions can refer to outer     // variables like args     specs argspecs()     {         specs* s = new specs;         // no need for '->'         s.count = args.length;     // get length of array with .length         s.allocated = typeof(args).sizeof; // built-in native type properties         foreach (argv; args)             s.allocated += argv.length * typeof(argv[0]).sizeof;         return *s;     }      // built-in string and common string operations     writefln("argc = %d, " ~ "allocated = %d",  argspecs().count, argspecs().allocated); }  class CmdLin {     private int _argc;     private string _argv;  public:     this(int argc, string argv) // constructor     {         _argc = argc;         _argv = argv;     }      int argnum()     {         return _argc + 1;     }      string argv()     {         return _argv;     }      string suffix()     {         string suffix = "th";         switch (_argc)         {           case 0:             suffix = "st";             break;           case 1:             suffix = "nd";             break;           case 2:             suffix = "rd";             break;           default:      break;         }         return suffix;     } } 

Note: all D users agree that by downloading and using D, or reading the D specs, they will explicitly identify any claims to intellectual property rights with a copyright or patent notice in any posted or emailed feedback sent to Digital Mars.


The D programming language, also known simply as D, is an object-oriented, imperative, multi-paradigm system programming language by Walter Bright of Digital Mars. It originated as a re-engineering of C++, but even though it is predominantly influenced by that language, it is not a variant of it. D has redesigned some C++ features and has been influenced by concepts used in other programming languages, such as Java, C# and Eiffel. A stable version, 1.0, was released on January 2, 2007.[3] An experimental version, 2.0, was released on June 17, 2007

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