Passing string from D to c++

monarch_dodra monarchdodra at
Wed Jul 31 00:48:28 PDT 2013

On Wednesday, 31 July 2013 at 05:56:13 UTC, Ali Çehreli wrote:
> On 07/30/2013 02:17 PM, JS wrote:
> > A C++ string is null terminated while a D string is not.
> I think the OP means std::string, which also is not 
> zero-terminated. (On the other hand, C strings are 
> zero-terminated.)

You can obtain a 0 terminated "const char*" from an std::string 
in 0(1) using c_str.

While the C++98 standard doesn't mandate it, the above 
requirement means that 99% of string implementations are using 
arraysinternally. The C++11 standard *does* mandate that the 
implementation use arrays internally. So that means you can get a 
valid char* from &myString[0].

That string will not be 0 terminated, but all the major compiler 
providers (AFAIK) make that guarantee as an extension.

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