Calypso and the future of D

[Walter Bright via Digitalmars-d]

On 1/25/2015 3:07 PM, Elie Morisse wrote:
> On Sunday, 25 January 2015 at 22:45:31 UTC, Walter Bright wrote:
>> Not what I meant.
>>
>> What does parse.c have to do with the user of Calypso?
>>
>> How does the user use Calypso? Where is Calypso? How do I run Calypso?
>>
>> A user of Calypso will be baffled when encountering user documentation of
>> Calypso that explains it in terms of dmd internal source code.
>
> Is the new README any better?

No. It doesn't answer any of my questions.

> Once I succeed making the nature of Calypso
> intelligible does the showcase example seem self-explaining enough to make the
> usage straightforward?

I'm obviously terrible at communicating. Let me try again. Assume that I wrote 
Calypso, and I was explaining it to you:

-----------------------------------------

Given the C++ header file foo.h:

     void bar(unsigned *);

and the C++ source file foo.cpp:

     void bar(unsigned *p) { }

I want to call bar() from my D code in test.d:

     void main() {
       uint x;
       bar(&x);
     }

Here's how to do it with Calypso:

     calypso foo.h

which will generate the file foo.d. add an import to test.d:

     import foo;

     void main() {
       uint x;
       bar(&x);
     }

To compile and link:

     clang++ foo.cpp -c
     dmd test foo.o

Which generates the program 'test' which can be run.