assert/static assert message format difference
Basile B.
b2.temp at gmx.com
Tue Jun 13 17:01:36 UTC 2023
On Tuesday, 13 June 2023 at 16:46:26 UTC, DLearner wrote:
> Only a small thing, but is it intended that:
> ```
> void main() {
>
> // static assert (false, "Static Assert triggered");
> assert(false, "Assert triggered");
>
> }
> ```
> produces
> ```
> core.exception.AssertError at staticassertex01.d(4): Assert
> triggered
> ```
> but removing the // produces
> ```
> staticassertex01.d(3): Error: static assert: "Static Assert
> triggered"
> ```
> ie message surrounded by double-quotes?
internal detail.
Static assert will render the message by formatting an AST node,
i.e the StringExp (as the string has to be statically evaluable),
using a compiler module called the hdrgen, leading to have the
double quotes included, because the hdrgen is supposed to give
back the source code for a particulat node.
Runtime assert only know the string ptr and len, which are
runtime values. So... in that case it's more like a format %s,
that takes another path.
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