[Issue 17487] CTFE should allow casting delegate function attributes

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17487

Eyal <eyal at weka.io> changed:

           What    |Removed                     |Added
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           See Also|                            |https://issues.dlang.org/sh
                   |                            |ow_bug.cgi?id=17486

--- Comment #1 from Eyal <eyal at weka.io> ---
I have a specific use-case:

assertOp!"<="(x, y);

I want x/y to be lazy so I can disable the assert at runtime (and avoid costs
of computing x,y). I also want any exceptions computing x,y to be caught by
assertOp.

I also need assert functions (including this one) to be @nogc but this is not
directly supported due to (https://issues.dlang.org/show_bug.cgi?id=17486).

So I need to use a delegate cast to achieve the combination of @nogc and lazy
params. This rules out any function that indirectly uses assertOp from ctfe,
which is sad.

if(__ctfe) could skip the asserts altogether, but that loses a lot too.

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