dmd foreach loops throw exceptions on invalid UTF sequences, use replacementDchar instead

[Ola Fosheim Grøstad]

On Monday, 8 November 2021 at 12:32:08 UTC, FeepingCreature wrote:
> Generally, you're reading data that someone wrote for a reason, 
> and ReplacementCharacter would almost universally indicate that 
> there was something you were meant to pick up on but failed to 
> handle. As such, it's much less clear to me whether there even 
> are cases where "text with replacement characters" or "text 
> with replacement characters removed" is even useful.

It could mean that someone did cut'n'paste of text from a more 
recent version of the Unicode standard. ReplacementCharacter 
makes it possible for you to use the input regardless (replacing 
it with a question mark in a square or something).

I think this is an application level feature, and not a language 
level feature, so it doesn't make sense for the language to do 
this IMO. That we can agree on.

(D is not a scripting langauge.)