Calling C++ "void foo(Klass&)"

[Mengu via Digitalmars-d]

On Thursday, 10 August 2017 at 07:58:55 UTC, Arjan wrote:
> On Thursday, 10 August 2017 at 00:32:40 UTC, Mengu wrote:
>> my second question is: i have no idea what's going on in this 
>> file: 
>> https://github.com/whoshuu/cpr/blob/master/include/cpr/body.h 
>> i'd appreciate some pointers.
>
> A new 'type' named Body which IS-A std::string is defined.

i think we can mimic this with an alias this for a string (or 
const char*) property. is that right?

> To construct a Body there are various options:
> The ctors 'default': Body(), 'copy': Body(const Body&) and 
> 'move': Body(Body&&) ctors are using the compiler generated 
> default implementation.
> The same is true for the assignment operators =

how can i check what compiler generates for default so i can add 
them to my extern C++ clause?

> Then a few explicit conversion ctors are defined to construct a 
> Body from a const char* string and std::string. Explicit means 
> the compiler is not allowed to implicit convert to std::string 
> or const char* for provide args not being a const char* or 
> std::string but for which a conversion exists.
>

i'll give these converters a try.


> Since the h file also contains the definitions, the compiler 
> must inline the code for the Body ctors and assignment 
> operator. It also means not C/cpp file is needed since the 
> function bodies are already in the h file.

i realized that when i saw the member initialization syntax in 
header files.

>
> HTH

thank you very much for the detailed explanation.