Problems using rawWrite in an experiment with WAVs in D

[Paul Backus]

On Wednesday, 27 December 2023 at 20:20:23 UTC, tososdk wrote:
> I was recreating some code from C++ to D:
[...]
> But since I am somewhat new to these topics and even more so to 
> Dlang, I don't understand very well. The problem occurs in the 
> creation of the .wav, regarding rawWrite, I'm not really sure 
> what to do in that specific part. Maybe I'm ignorant, but I'm 
> not very good at these topics, plus it's for experimentation.

Here's the error message I got when I tried to compile your code:

```
Error: template `std.stdio.File.rawWrite` is not callable using 
argument types `!()(WavHeader)`
/dlang/dmd/linux/bin64/../../src/phobos/std/stdio.d(1273):        
Candidate is: `rawWrite(T)(in T[] buffer)`
```

What this message is saying is that you tried to pass a 
`WavHeader` to `rawWrite`, but `rawWrite` expects a slice (`T[]`, 
where `T` can be any type) as an argument.

The easiest way to fix this is to use [pointer slicing][1] to 
create a temporary slice that points to `wavh`:

```d
   file.rawWrite((&wahv)[0 .. 1]);
```

[1]: https://dlang.org/spec/expression.html#slice_expressions