3 ms·
And what pattern would you recommend if you needed to allocate?
by latch 8mo ago
And what pattern would you recommend if you needed to allocate?
- dns_snek 8mo agoThe diagnostic struct could contain a caller-provided allocator field which the callee can use, and a deinit() function on the diagnostic struct which frees everything.
- srcreigh 8mo agoIt's worth every effort to avoid situations where a function creates extra clean up responsibilities to the caller only on error conditions. If I really needed a large error payload, too big to fit on the stack, I'd probably want to do something like this: const errbuf = try alloc.alloc(u8, 1024*1024*1024); module.setErrorBuf(&errbuf) defer { module.setErrorBuf(null); alloc.free(errbuf); } var func_diag = diagnostics.OfFunction(module.func){}; module.func(foo, bar, &func_diag) catch |err| switch (err) { error.BigPayload => { const payload = func_diag.get(error.BigPayload); // The payload can reference the 1MiB of data safely here, // and it's cleaned up automatically. } }