A Philosophy of Software Design

[Richard (Rikki) Andrew Cattermole]

On 29/06/2026 7:58 PM, Walter Bright wrote:
> On 6/28/2026 5:14 AM, Alexandru Ermicioi wrote:
>> You'd typically pass this info in exception itself, therefore getting 
>> file and number, and runtime values causing this.
> 
> There wouldn't be an exception thrown if:
> 
> ```d
> double d;
> ```
> 
> default initializes it to 0.0 instead of NaN. You will never have an 
> indication that the calculation produces the wrong value.

If it propergates yes, you need a read barrier check and throw if NaN.

But you can also throw static analysis at it to catch royally stupid 
cases like so:

```d
void thing(float arg) {
	float f;

	return f + arg * 2;
}
```