what the closest thing we have to racket's check_expect()?

[WebFreak001]

On Wednesday, 22 December 2021 at 20:14:01 UTC, Dr Machine Code 
wrote:
> it differ from assert because it contains the expression, file 
> and line information. See this 
> https://stackoverflow.com/questions/14420857/check-expect-example-in-racket
> what's the closest thing we have in D? can we make it without 
> compiler  builtin?

if you just want to use an assert, the compiler flag 
`-checkaction=context` basically gives you this kind of error 
messages.

Example how to use in DUB (from serve-d): 
https://github.com/Pure-D/serve-d/blob/84094fade433f3d52e43c5296d20af53b102ffdd/dub.json


```d
void main()
{
     assert(1 + 1 == 2);
     assert(1 + 1 == 1);
}

__EOF__

Sample output:

core.exception.AssertError at onlineapp.d(4): 2 != 1
----------------
??:? _d_assert_msg [0x563912072788]
./onlineapp.d:4 _Dmain [0x563912069f54]
```

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