On 09/23/2015 01:44 AM, Sönke Ludwig wrote:
Am 22.09.2015 um 22:18 schrieb Nick Sabalausky:
=====================
String Interpolation:
=====================
https://github.com/Abscissa/scriptlike#string-interpolation
AFAICT, a string mixin is necessary to accomplish this in D, but
otherwise it works much like other languages:
--------------------------------------------
// Output: The number 21 doubled is 42!
int num = 21;
writeln(
mixin(interp!"The number ${num} doubled is ${num * 2}!")
);
--------------------------------------------
The interpolated sections are handled via std.conv.text(), so they
accept any type.
Bikeshedding requested! I'm not 100% sold on the name "interp" for this
long-term. Suggestions welcome.
An alternative idea would be to mix in a local "writeln" function, which
can then be used multiple times without syntax overhead:
mixin template interp()
{
void iwriteln(string str)()
{
// pretend that we actually parse the string ;)
write("This is ");
write(somevar);
writeln(".");
}
}
void main()
{
int somevar = 42;
mixin interp;
iwriteln!("This is ${somevar}.");
}
Yah, I think we need something like that in the stdlib. Also, we need
writefln with compile-time format string (someone was working on it but
I haven't heard about it in a while). -- Andrei
