I found a way to call C from in Objective C. The big trick is to
rename a .m file to a .mm file. So, I think there's probably a
way for me to link a compiled C dylib into Objective C and then
load its .h header file so that Objective C can call those C
functions.
I'll be using GCC to statically combine the D's .o code in with
the C code.
So, I'm thinking the process is like this:
1. Create a D function d_test() that takes a string input,
concatenates on "-response", and returns the result. Compile as
dtest.o with "dmd -c dtest.d".
2. Create a C function c_test() that takes a string input, calls
d_test() and passes it the string, and then returns the response
from d_test() out of c_test() as a string result. Compile as
ctest.dylib with "gcc -dynamiclib -o ctest.dylib ctest.c dtest.o
-L/usr/local/lib -lphobos2 -lpthread -lm".
3. In Xcode IDE, add this ctest.dylib linked library. Then,
create a ctest.h for the function declaration.
4. In Objective C, import ctest.h in my main.mm file and then
call with something like NSLog("RESULT=%s",c_test("request"));
That should create a debugger line that reads:
RESULT=request-response.
The problem is that I don't know the entire way that I should
create dtest.d and ctest.c.
