On Tuesday, 26 November 2019 at 03:55:24 UTC, mipri wrote:
On Tuesday, 26 November 2019 at 03:06:52 UTC, Omar wrote:
the page here https://dlang.org/spec/function.html
suggests you can implement a function in a different file
...
mentioned the endeavour of no-bodied-functions as a way of
presenting a black-box type of interface.
oh, that's what you were asking.
Consider:
$ cat interface/references.d
module references;
string greeting();
$ cat implementation/references.d
module references;
string greeting() {
return "Hello, Dave";
}
$ cat main.d
import references;
void main() {
import std.stdio: writeln;
writeln(greeting);
}
And trying to build it:
$ dmd -c implementation/references.d
$ dmd -Iinterface -c main.d
$ dmd main.o references.o
$ ./main
Hello, Dave
The idiomatic way to do that is to put the interface in a "D
interface" file (.di) and the implementation in a .d file:
foo/bar.di
foo/bar.d
Then, when importing foo.bar, the compiler will pick up the .di
file automatically.
And you can actually have the compiler generate the interface
file for you from a source file with the -H option.
