On Tuesday, 2 July 2024 at 07:23:42 UTC, ryuukk_ wrote:
I said it 2 times already, i don't want string concatenation,
i'll benchmark later, but not right now, right now i'm looking
for a functioning code without string concatenation
Your buffer solution works, but you need to put it inside a
*function*, not at declaration scope. What you wrote declares
*runtime* variables, which wouldn't be usable at compile time (if
you got it past the parser, which is where it was failing).
So for instance:
```d
mixin template implement()
{
mixin(() {
// ctfe new array is basically the same as static array
char[] buffer = new char[4096];
int pos = 0;
void append(string str)
{
buffer[pos .. pos + str.length] = str[];
pos += str.length;
}
append("void* ctx;");
return buffer[0 .. pos];
}());
}
```
And yes, it is faster to do this than appending. But you have to
do a *lot* of it to make a huge difference.
-Steve
