D-language calls std::string in C + +

Calling std::string in C + + in the D language requires the use of the extern (c++,class) syntax, which is not supported in the DMD2.071 version and requires the use of ldc1.1.

: https://github.com/ldc-developers/ldc/releases/. Download Ldc2-1.1.0-alpha1-win32-msvc.zip

When using ldc2-1.1, you must use the VS2015 library file because you need to connect.

Use Visuald to test call std::string below.

Unpack the LDC in the following directory:

Use vs2015 to create a new project, such as:

To set up the LDC Path: (tools---options and projects and SOLUTIONS)

Settings using the LDC Compiler: (project attribute-->general)

Compiling a 32-bit program with LDC does not require setting the Ms-coff format, because he is using the Ms-coff format.

one, the test string* call (completely Normal)

Test.cpp

#include <stdio.h>#include<iostream>#include<string>using namespacestd;extern "C + +"{    string*getstdstring () {return New string("Hello std::string"); }    voidPrintstdstring (string*Str) {printf ("str:\r\n"); printf ("%s\r\n",str->C_str ()); }}

Std.d

Module stl;extern(c + +, Std) {    extern(c + +,class)structAllocator (CharT); structchar_traits (CharT) {}extern(c + +,class)structbasic_string (CharT, chartraits = char_traits! ( CharT), Allocator = allocator!(CharT)) {}}extern(c + +) {alias String= std.basic_string! (Char); voidPrintstdstring (string*str); String*getstdstring ();}voidtest () {auto str=getstdstring (); Printstdstring (str);}

Main.d

Import Std.stdio;import stl; int Main (string[] argv) {    test ();    READLN ();     return 0 ;}

second, the test string& call (the result is not normal)

Test.cpp

#include <stdio.h>#include<iostream>#include<string>using namespacestd;extern "C + +"{    string&getstdstring () {return string("Hello std::string"); }    voidPrintstdstring (string&Str) {printf ("str:\r\n"); printf ("%s\r\n", Str.c_str ()); }}

Stl.d

Module stl;extern(c + +, Std) {    extern(c + +,class)structAllocator (CharT); structchar_traits (CharT) {}extern(c + +,class)structbasic_string (CharT, chartraits = char_traits! ( CharT), Allocator = allocator!(CharT)) {}}extern(c + +) {alias String= std.basic_string! (Char); voidPrintstdstring (refString str); refString getstdstring ();}voidtest () {auto str=getstdstring (); Printstdstring (str);}

Main.d

Import Std.stdio;import stl; int Main (string[] argv) {    test ();    READLN ();     return 0 ;}

Compile Run:

Can compile through, also can run, just not want the structure, specific problems also need analysis ...

Iii. call to test the C_str () method of the string* (fully Normal)

Call the C_str () method of the string

Test.cpp

#include <stdio.h>#include<iostream>#include<string>using namespacestd;extern "C + +"{    string*getstdstring () {return New string("Hello std::string"); }    voidPrintstdstring (string*Str) {printf ("C + + output:%s\r\n",str->C_str ()); }}

Stl.d

Module stl;extern(c + +, Std) {    extern(c + +,class)structAllocator (CharT); structchar_traits (CharT) {}extern(c + +,class)structbasic_string (CharT, chartraits = char_traits! ( CharT), Allocator = allocator!(CharT)) {        extern(c + +) public  Const Const(CharT) *C_str (); }}extern(c + +) {alias String= std.basic_string! (Char); voidPrintstdstring (string*str); String*getstdstring ();}

Main.d

import std.stdio;import stl;import std. string ; void Test () {    = getstdstring ();     = Fromstringz (str.c_str ());    Printstdstring (str);    Writeln ("D   ", dstr);} int Main (string[] argv) {    test ();    READLN ();     return 0 ;}

Compile Run:

Finish running Successfully.

D language calls std::string in C + +