```
string snappyCompress(const string plaintext) {
import deimos.snappy.snappy : snappy_compress,
snappy_max_compressed_length, SNAPPY_OK;
import core.stdc.stdlib : malloc, free;
import std.string : fromStringz, toStringz;
char *input = cast(char *) toStringz(plaintext);
size_t output_length =
snappy_max_compressed_length(plaintext.length);
char *output = cast(char *) malloc(output_length);
if(snappy_compress(input, plaintext.length, output,
&output_length) == SNAPPY_OK) {
string ret = (cast(string) fromStringz(output)).clone();
// <---- do something magical here
return ret;
}
assert(0);
}
```
How can I get the GC to automatically garbage collect the
`output` malloc call by tracking the returned `ret` reference? Or
is this already managed by the gc because I cast to a `string`?
