is "import std;" a valid approach or a violation of the D programming language?

[Dennis]

On Thursday, 6 May 2021 at 22:27:21 UTC, Steef Boerrigter wrote:
> My question is now, am I abusing an oversight in dmd when I 
> import the entire phobos library, or is it a bug of gdc to 
> *not* accept this approach?

The `std` package is a relatively recent addition (DMD 2.086), 
and gdc is simply a bit behind on the latest front-end currently. 
It used to be called `std.experimental.all`, so you could do:

```D
static if (__VERSION__ <= 2085) {
     import std.experimental.all;
} else {
     import std;
}
```

Note that it is discouraged to use outside scripts / small 
applications, because every time a new symbol is added into 
Phobos, there is potential it could clash with one of your own 
symbols. For example, say you already imported your own 
`SumType`, and then `std.sumtype` was added. You now get 
ambiguous symbol errors because you're importing `std.sumtype` 
unintentionally.