On Tuesday, 6 March 2018 at 23:50:20 UTC, Timon Gehr wrote:
On 06.03.2018 10:02, Walter Bright wrote:
On 3/6/2018 12:45 AM, Timon Gehr wrote:
Anyway, "do not use assert" is not the solution, as I have
explained many times now.
My interpretation is you want D assert to behave like C assert.
This interpretation is wrong. I, as well as other people, want
a compiler option to make the compiler ignore D asserts and
contracts. Not more, not less.
Is it an option having the compiler not to remove the asserts
from @safe code, like bounds check?
Just to understand, otherwise, if the assert is removed and it
does not hold, you are in UB, so the request is to guarantee
memory safety in a UB state, right?
The point I don't grasp is why keep running in UB in @safe is
acceptable, while memory corruption not.
Creating library asserts is why D has special support for
__FILE__ and __LINE__ like C does, and for the same reasons.
What I want is special support for sane built-in assert
semantics using a compiler flag.
and that's a reasonable request, that, IMHO, does not hurts
anybody....
That does not mean that there cannot _also_ be a flag to
unleash the nasal demons upon unworthy programmers who were
stupid enough to collaborate with someone who imported an
external library that was written by somebody who had a bad day
one time and left in a wrong assertion.
That's a process management problem, I think.
Debug version of external libraries can be requested, and the
author can be reported about the bad-day wrong assert. I know,
if I can catch it...
Again: There is no reason why we need to force one behavior
over the other. This should be configurable.
I'm all in for having the maximum flexibility in configuration,
but I would stick with Walter as keeping its idea as the default.
/Paolo
